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TABLE OF CONTENTS

Filed Pursuant to Rule 424(b)(3)
Registration No. 333-124130

PROSPECTUS

AFFORDABLE RESIDENTIAL COMMUNITIES INC.

2,387,981 SHARES OF COMMON STOCK

        This prospectus relates to the offer and sale from time to time by certain stockholders of up to 2,387,981 shares of our common stock that may be issued from time to time in exchange for Partnership Common Units of Affordable Residential Communities LP ("OP units"). We refer to these stockholders as the selling stockholders.

        The registration of the shares covered by this prospectus does not necessarily mean that any of the shares will be offered or sold by the selling stockholders. We will not receive any proceeds from the resale of the shares of our common stock by the selling stockholders named herein. We will pay all expenses of this offering, other than commissions and discounts of broker-dealers and market makers.

        The selling stockholders may sell the common stock offered hereby from time to time on the New York Stock Exchange or such other national securities exchange or automated interdealer quotation system on which shares of the common stock are then listed or quoted, through negotiated transactions or otherwise at market prices prevailing at the time of the sale or at negotiated prices.

        Our common stock is listed on the New York Stock Exchange under the symbol "ARC." The last reported sale price of our common stock on the New York Stock Exchange on April 28, 2005 was $12.68 per share.

        INVESTING IN OUR COMMON STOCK INVOLVES RISKS. YOU SHOULD CAREFULLY CONSIDER THE RISK FACTORS BEGINNING ON PAGE 3 OF THIS PROSPECTUS BEFORE YOU MAKE AN INVESTMENT IN OUR COMMON STOCK.

        Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is May 3, 2005



TABLE OF CONTENTS

PROSPECTUS SUMMARY   1

RISK FACTORS

 

3

FORWARD LOOKING STATEMENTS

 

17

USE OF PROCEEDS

 

18

U.S. FEDERAL INCOME TAX CONSIDERATIONS

 

19

SELLING STOCKHOLDERS

 

38

PLAN OF DISTRIBUTION

 

41

LEGAL MATTERS

 

43

EXPERTS

 

43

WHERE YOU CAN FIND MORE INFORMATION

 

44

INCORPORATION OF DOCUMENTS BY REFERENCE

 

44

ABOUT THIS PROSPECTUS

        This prospectus is part of a registration statement which we filed with the Securities and Exchange Commission, or SEC, using a "shelf" registration process. Under this shelf process, certain stockholders may sell the shares of our common stock issued from time to time in exchange for OP units, as described in this prospectus. We will not receive any proceeds from any sale of the shares of our common stock by the selling stockholders. You should read both this prospectus and the additional information described under the heading "Where You Can Find More Information" beginning on page 43.

        Unless the context otherwise requires, in this prospectus the terms "ARC," the "Company," "we," "us" or "our" refer to Affordable Residential Communities Inc. and its consolidated subsidiaries. "OP" or "operating partnership" refers to Affordable Residential Communities LP., our operating partnership subsidiary.

        You should rely only on the information contained in or incorporated by reference in this prospectus. We have not authorized anyone to provide you with information different from that contained in or incorporated by reference in this prospectus. The selling stockholders may offer for resale shares of our common stock and seek offers to buy such securities only in jurisdictions where offers and sales are permitted. The information contained in this prospectus is accurate only as of the date of this prospectus, regardless of the time of delivery of this prospectus or of any sale of our common stock.

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PROSPECTUS SUMMARY

        This brief summary does not contain all of the information that may be important to you. You should carefully read this entire document and the other documents to which this prospectus refers you before making your investment decision. See "Where You Can Find More Information."

The Company

        We are a fully integrated, self-administered and self-managed equity real estate investment trust, or REIT, focused primarily on the acquisition, renovation, repositioning and operation of all-age manufactured home communities. We also rent and sell manufactured homes, finance sales of manufactured homes and act as agent in the sale of homeowners' insurance and other related insurance products, all exclusively to residents in our communities.

        As of December 31, 2004, we owned and operated 315 communities in 27 states containing 63,661 homesites.

        Our properties are located in 27 states and represent 67 markets across the U.S. Our five largest markets are Dallas-Fort Worth, Texas, with 11.4% of total homesites; Atlanta, Georgia, with 7.8% of total homesites; Salt Lake City, Utah, with 6.0% of total homesites; the Front Range of Colorado, with 5.2% of total homesites; and Kansas City/Lawrence/Topeka, Kansas with 3.8% of total homesites.

        On February 18, 2004, we completed our initial public offering, or IPO, of 24,508,617 shares of our common stock (including 2,258,617 shares sold by selling securityholders) and 5,000,000 shares of our 8.25% Series A cumulative redeemable preferred stock. The net proceeds to the Company (after underwriting discounts but before expenses) from our sale of common stock and preferred stock in the IPO were $517.5 million. On March 17, 2004, we issued an additional 791,592 shares of common stock pursuant to the underwriters' exercise of their over-allotment option, generating net proceeds to the Company (after underwriting discounts but before expenses) of $14.0 million. In conjunction with the IPO, we also completed a financing transaction consisting of $500 million of new mortgage debt and the repayment of certain existing indebtedness. With a portion of the proceeds from our IPO and the financing transaction, we acquired 90 manufactured home communities from Hometown America, L.L.C., or Hometown, located in 24 states with 26,406 homesites. The total purchase price for these communities and related assets was approximately $615.3 million including assumed indebtedness with a fair value of $93.1 million.

        We were organized in 1998 as a Maryland corporation and have elected to be taxed as a REIT under the Internal Revenue Code, commencing with our taxable year ended December 31, 1998. We conduct all of our business activities through our operating partnership, of which we are the sole general partner and in which we held a 94.4% ownership interest as of December 31, 2004. The remaining 5.6% ownership interest in the OP represents outstanding common limited partnership interests, or OP units. Each of these outstanding OP units, which were issued in our May 2002 reorganization, is part of a paired unit that includes 1.9268 shares of our special voting stock. Each of these paired units is currently exchangeable by its holder for cash or, at our election, one share of our common stock, and each paired unit entitles its holder to one vote on all matters submitted to a vote of our stockholders. Collectively, limited partners who hold these paired units have approximately 5.6% of the total voting power of our outstanding voting stock as of December 31, 2004.

        Our principal executive, corporate and property management offices are located at 600 Grant Street, Suite 900, Denver, Colorado 80203, and our telephone number is (303) 383-7500. Our internet address is www.aboutarc.com. The information contained on our website is not part of this prospectus.



The Offering

Securities offered by the selling stockholders   2,387,981 shares of our common stock that may be issued from time to time in exchange for OP units of the operating partnership.

Use of proceeds

 

We will not receive any proceeds upon any sale of common stock by the selling stockholders.

New York Stock Exchange symbol

 

"ARC"

Risk factors

 

Before investing in our common stock, you should carefully read and consider the information set forth in "Risk Factors" beginning on page 3 of this prospectus and all other information appearing elsewhere and incorporated by reference in this prospectus and any accompanying prospectus supplement.

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RISK FACTORS

        Before you invest in our common stock, you should be aware that there are various risks, including those described below. You should consider carefully these risk factors together with all of the other information included or incorporated by reference in this prospectus before you decide to purchase our securities. The following Risk Factors could adversely affect our revenue, expenses, net income, cash flow, ability to pay or refinance our debt obligations, ability to make distributions to our stockholders, and/or the per share trading price of our common stock.

Risks Related to Our Properties and Operations

        Adverse economic or other conditions in the markets in which we do business, including our five largest markets of Dallas-Fort Worth, Texas; Atlanta, Georgia; Salt Lake City, Utah; the Front Range of Colorado; and Kansas City/Lawrence/Topeka, Kansas could negatively affect our occupancy and results of operations. Our operating results are dependent upon our ability to achieve and maintain a high level of occupancy in our communities. Adverse economic or other conditions in the markets in which we do business, and specifically in metropolitan areas of those markets, may negatively affect our occupancy and rental rates, which in turn, may negatively affect our revenues. If our communities do not generate revenues sufficient to meet our cash requirements, including operating and other expenses, debt service and capital expenditures, our net income, funds from operations ("FFO"), cash flow, financial condition, ability to make distributions to stockholders and common stock trading price could be adversely affected. The following factors, among others, may adversely affect the occupancy of our communities and/or the revenues generated by our communities:

        Our communities located in Dallas-Fort Worth, Texas; Atlanta, Georgia; Salt Lake City, Utah; the Front Range of Colorado; and Kansas City/Lawrence/Topeka, Kansas contain approximately 11.4%, 7.8%, 6.0%, 5.2% and 3.8%, respectively, of our total homesites. As a result of the geographic concentration of our communities in these markets, we are particularly exposed to the risks of downturns in these local economies as well as to other local real estate market conditions or other conditions which could adversely affect our occupancy rates, rental rates and the values of communities in these markets.

        Our results of operations also would be adversely affected if our tenants are unable to pay rent or if our homesites or our rental homes are unable to be rented on favorable terms. If we are unable to

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promptly relet our homesites and rental homes or renew our leases for a significant number of our homesites or rental homes, or if the rental rates upon such renewal or reletting are significantly lower than expected rates, then our business and results of operations would be adversely affected. In addition, certain expenditures associated with each community (such as real estate taxes and maintenance costs) generally are not reduced when circumstances cause a reduction in income from such community and could increase without a corresponding increase in rental or other income. Furthermore, real estate investments are relatively illiquid and, therefore, will tend to limit our ability to vary our portfolio promptly in response to changes in economic or market conditions.

        In addition, periods of economic slowdown or recession, rising interest rates or declining demand for real estate, or the public perception that any of these events may occur, could result in a general decline in rents or an increase in defaults under existing leases, which would adversely affect our net income, FFO, cash flow, financial condition, ability to pay or refinance our debt obligations, ability to make distributions to our stockholders and the per share trading price of our common stock.

        We may not be able to maintain and improve our occupancy through expansion of our home lease with option to purchase program and our rental home program, which could negatively affect our revenue and our results of operations. We have responded to the challenging operating environment for manufactured home communities by developing and implementing a range of programs and initiatives aimed at increasing and maintaining our occupancy, including our home lease with option to purchase program and our rental home program. Our ability to maintain and increase occupancy and improve our operating margins in our existing communities in the future will depend to a large degree upon the success of these programs.

        Pursuant to our rental home program, we acquire manufactured homes, place them on unoccupied homesites in selected communities in our portfolio and lease them, typically for a one-year lease term. For the year ended December 31, 2004, rental income received from residents of our rental homes totaled $40.3 million. Our overall occupancy at December 31, 2004 was 81.5% with homeowners occupying 72.1% of our total homesites and tenants in our rental homes occupying approximately 9.4% of our total homesites. If we are unable to improve and maintain occupancy in our communities through expansion of our lease with option to purchase program and our rental home program, our operating results may be negatively affected. Our ownership of rental homes also increases our capital requirements and our operating expenses and subjects us to greater exposure to risks such as re-leasing risks and mold-related claims. In addition, our increased sales and leasing activities increase our exposure to these matters as well as to legal and regulatory compliance costs and risks and to litigation and claims arising out of the same.

        Our lease with option to purchase program is a new program which differs significantly from the lease-to-own programs offered by certain of our competitors, and we are not aware of any lease-to-own program structured in a manner similar to ours. Accordingly, while we believe our program has been structured and is being implemented in compliance with applicable legal and regulatory requirements in all material respects, we have no significant past experience operating this program and neither the structure and terms of the program nor our management and implementation of the program have been subject to review by any court or regulatory agency or authority in any suit or proceeding. There can be no assurance, if any such review were to occur, that the structure and terms of the program and our management and implementation of the program will be found to be in compliance with all such applicable legal and regulatory requirements. Any determination by a court or other agency or authority of competent jurisdiction finding a violation of any applicable legal or regulatory requirements, or the threat of such a determination, could subject us to material fines, penalties, judgments or other payments, which could have an adverse effect on our financial condition and results of operations, and also could result in significant changes to the structure and terms of the program, which could increase the costs to us of continuing the program or otherwise adversely affect our ability

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to continue to maintain the program, which could have an adverse effect on our ability to increase occupancy and improve our results of operations.

        We may not be able to maintain and improve our occupancy through expansion of our in-community home sales and financing initiative, which could negatively affect our revenue and our results of operations. We have responded to the challenging operating environment for manufactured home communities by developing and implementing a range of programs and initiatives aimed at increasing and maintaining our occupancy, including our in-community home sales and financing initiative. Our ability to maintain and increase occupancy and improve our operating margins in our existing communities in the future will depend to some degree upon the success of this initiative. Through our in-community home sales and financing initiative, we intend to significantly expand our capability both to acquire for-sale manufactured home inventory and sell these homes to customers in our communities at reasonable prices and to finance sales of these homes to customers in our communities. We have obtained a multi-year debt facility pursuant to which we will be able to fund up to $125 million to support loan originations in connection with the sale of homes in our communities. If we are not able to maintain this debt facility, we do not expect to be able to fully fund this initiative, which could significantly impair our ability to maintain or increase our occupancy in our communities and to achieve growth in our revenue and operating margins.

        The availability of advances under our retail home sales and consumer finance debt facility is subject to certain conditions that are beyond our control. Conditions that could result in our inability to draw on these facilities include a downgrade of the lender's credit rating, Inc. and the absence of certain markets for financing debt obligations secured by securities or mortgage loans. Funding under this facility may also be denied if the lender determines that the value of the assets serving as collateral would be insufficient to maintain the required 75% loan-to-value ratio upon giving effect to a request for funding. The lender can also at any time require that we prepay amounts funded or provide additional collateral if in its judgment this is necessary to maintain the 75% loan-to-value ratio.

        We have no significant operating history in the consumer finance business and we cannot assure you that we will be able to successfully expand this initiative and manage this business. Loans produced by our in-community home sales and financing initiative may have higher default rates than we anticipate, and demand for consumer financing may not be as great as we anticipate or may decline. Our in-community home sales and financing initiative operates in a regulated industry with significant consumer protection laws, and the regulatory framework may change in a manner which may adversely affect our operating results. The regulatory environment and associated consumer finance laws create a risk of greater liability from our in-community home sales and financing initiative and could subject us to private claims and awards. This initiative is dependent on licenses granted by state and federal regulatory bodies, which may be withdrawn or which may not be renewed and which could have an adverse impact on our ability to achieve our operating objectives. We have obtained many, and are in the process of obtaining all of the remaining state and local licenses and permits necessary for us to implement this initiative in all of the markets in which we operate.

        We continue to work to integrate the Hometown communities, and we may not realize the improvements in occupancy and operating results that we anticipate from this acquisition. The Hometown acquisition was significantly larger than the largest portfolio acquisition of manufactured home communities we had completed previously, and there can be no assurance that we will in fact be able to effectively integrate all of the Hometown communities and fully realize the anticipated benefits of this acquisition. In evaluating these communities following the acquisition, we have encountered and continue to address various issues associated with integrating them into our operations, including significant employee turnover and replacement, higher than anticipated deferred maintenance costs and issues relative to resident quality of life. Because we do not have the same operating experience with the Hometown communities as we do with our other manufactured home communities, we have not been able to fully anticipate operating difficulties with the Hometown communities, such as lease-related issues, zoning

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issues, environmental issues, personnel issues or mold-related issues, to the same degree that we can anticipate similar operating difficulties with the other manufactured home communities we currently operate. In addition, as a result of the Hometown acquisition, we now operate manufactured home communities in 27 new markets in which we did not previously have experience operating, and our lack of experience in these markets may hinder our ability to operate the Hometown communities in these markets successfully and to achieve our anticipated operating results.

        We also must continue to address the existing vacancies in the Hometown communities through our programs and initiatives aimed at increasing occupancy, including our rental home program and our in-community retail home sales and consumer financing initiative. Delays in completing the integration of the Hometown communities resulting from the issues described above have resulted in delays in implementing these programs and initiatives at the Hometown communities. If we are not successful in implementing our rental home program and other initiatives in managing the Hometown communities, we may not be able to achieve the improvements in occupancy and operating results that we anticipate from the Hometown acquisition, which could adversely affect our financial condition, results of operations, cash flow, per share trading price of our common stock and our ability to satisfy our debt service obligations and to pay distributions to our shareholders.

        The terms of our acquisition agreement with Hometown may cause us to incur additional costs and liabilities. Pursuant to the acquisition agreement with Hometown, we have assumed all liabilities and obligations of Hometown with respect to the Hometown communities and the other acquired assets, whether known or unknown, absolute or contingent, and whether arising before or after the date we acquired the Hometown communities, subject to limited exceptions. In addition, Hometown is not required to indemnify us for any inaccuracy in or breach of any of its representations or warranties in the agreement. As a result of these provisions, we are responsible for liabilities and obligations with respect to the Hometown communities and the other acquired assets for which we have no recourse to Hometown or anyone else, and we may incur unanticipated costs in connection with completion of the Hometown acquisition and the integration of the Hometown communities in excess of our expected costs.

        The manufactured housing industry continues to face a challenging operating environment marked by a shortage of available financing for home purchases and a significant decrease in manufactured home shipments, which has put downward pressure on occupancy in manufactured home communities and may continue to do so. The manufactured housing industry continues to face a challenging operating environment which has resulted in losses, exits from the industry and significant curtailment of activity among manufacturers, retailers and consumer finance companies. According to Manufactured Housing Institute, or MHI, industry shipments (a measure of manufacturing production and wholesale sales) have declined from 372,843 homes in 1998 to 130,937 in 2003. We believe this ongoing period of challenging industry conditions was the result of an over-supply of consumer credit from 1994 to 1999, which led to over-stimulation in the manufacturing, retail home sales and financing sectors of the industry. When compared to the manufacturing, retail home sales and consumer finance sectors of the manufactured housing industry, the manufactured home community sector has been relatively less affected than the other three sectors but is also facing challenging conditions, including an increase in the number of repossessed and abandoned homes, a shortage of consumer financing to support new manufactured home sales and move-ins and resale of existing homes in manufactured home communities, and historically low mortgage interest rates and favorable credit terms for traditional entry-level, site-built housing, all of which has put downward pressure on occupancy levels in our manufactured home communities and may continue to do so. We expect industry conditions will remain difficult for the foreseeable future, based partly on overall economic conditions throughout the U.S. and a continued shortage of consumer financing for manufactured home buyers.

        We have reported historical accounting losses on a consolidated basis since our inception, and we may continue to report accounting losses in the future. We have had net losses available to common

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stockholders before allocation to minority interest of $94.7 million, $34.4 million, $40.8 million and $13.1 million for the years ended December 31, 2004, 2003, 2002, and 2001, respectively. As of December 31, 2004, our retained deficit was $252.0 million. There can be no assurance that we will not continue to incur net losses in the future.

        We may not be successful in identifying suitable acquisitions that meet our criteria or in completing such acquisitions and successfully integrating and operating acquired properties, which may impede our growth and negatively affect our results of operations. Our ability to expand through acquisitions is a part of our business strategy and requires us to identify suitable acquisition candidates or investment opportunities that meet our criteria and are compatible with our growth strategy. We may not be successful in identifying suitable real estate properties or other assets that meet our acquisition criteria or in consummating acquisitions or investments on satisfactory terms. Failure to identify or consummate acquisitions will reduce the number of acquisitions we complete and slow our growth, which could in turn adversely affect our stock price.

        We continue to evaluate available manufactured home communities in select markets when strategic opportunities arise. Our ability to acquire properties on favorable terms and successfully integrate and operate them may be exposed to the following significant risks:

        The availability of competing housing alternatives in our markets could negatively affect occupancy levels and rents in our communities, which could adversely affect our revenue and our results of operations. All of our properties are located in markets that include other manufactured home communities. The number of competing manufactured home communities in a particular market could have a material effect on our ability to lease our homes and/or homesites and to maintain or raise rents. Other forms of multifamily residential properties and single family housing, including rental properties, represent competitive alternatives to our communities. The availability of a number of other housing options, such as apartment units and new or existing site-built housing stock, as well as more favorable financing

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alternatives for the same, could have an adverse effect on our occupancy and rents, which could adversely affect our cash flow and financial condition and ability to make distributions to our shareholders.

        Uninsured losses or losses in excess of our insurance coverage could adversely affect our financial condition and our cash flow. We maintain comprehensive liability, fire, flood (where appropriate), extended coverage and rental loss insurance with respect to our properties with policy specifications, limits and deductibles customarily carried for similar properties. Certain types of losses, however, may be either uninsurable or not economically insurable, such as losses due to earthquakes, riots, acts of war or terrorism. Should an uninsured loss occur, we could lose both our investment in, and anticipated profits and cash flow from, a property, which could adversely affect our financial condition and our ability to make distributions to our shareholders. In addition, if any such loss is insured, we may be required to pay a significant deductible on any claim for recovery of such a loss prior to our insurer being obligated to reimburse us for the loss or the amount of the loss may exceed our coverage for the loss.

        Environmental compliance costs and liabilities associated with operating our communities may affect our results of operations. Under various federal, state and local laws, ordinances and regulations, owners and operators of real estate may be liable for the costs of removal or remediation of certain hazardous or toxic substances on or in such property. Such laws often impose such liability without regard to whether the owner or operator knew of, or was responsible for, the presence of such hazardous or toxic substances. The presence of such substances, or the failure to properly remediate such substances, may adversely affect the owner's or operator's ability to lease, sell or rent such property or to borrow using such property as collateral. Persons who arrange for the disposal or treatment of hazardous or toxic substances may also be liable for the costs of removal or remediation of such substances at a disposal or treatment facility, whether or not such facility is owned or operated by such person. Certain environmental laws impose liability for release of asbestos-containing materials into the air and third parties may seek recovery from owners or operators of real properties for personal injury associated with asbestos-containing materials.

        In connection with the ownership (direct or indirect), operation, management and development of real properties, we may be considered an owner or operator of such properties or as having arranged for the disposal or treatment of hazardous or toxic substances and, therefore, potentially liable for removal or remediation costs, as well as certain other related costs, including governmental fines and injuries to persons and property. All but one of our properties have been subject to a Phase I or similar environmental audit (which involves general inspections without soil sampling or ground water analysis) completed by independent environmental consultants. These environmental audits have not revealed any significant environmental liability that we believe would have a material adverse effect on our business or results of operations. No assurances can be given that existing environmental studies with respect to any of our properties reveal all environmental liabilities, that any prior owner or operator of our properties did not create any material environmental condition not known to us, or that a material environmental condition does not otherwise exist as to any one or more of our properties. Furthermore, material environmental conditions, liabilities, or compliance concerns may have arisen after the review was completed or may arise in the future; and future laws, ordinances or regulations may impose material additional environmental liability, which would adversely affect our financial condition, results from operations and ability to make distributions to stockholders.

        Increases in taxes and regulatory compliance costs may reduce our revenue. Costs resulting from changes in real estate tax laws generally are not passed through to tenants directly and will affect us. Increases in income, service or other taxes generally are not passed through to tenants under leases and may adversely affect our net income, FFO, cash flow, financial condition, ability to pay or refinance our debt obligations, ability to make distributions to stockholders, and the per share trading price of our common stock. Similarly, changes in laws increasing the potential liability for environmental conditions

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existing on properties or increasing the restrictions on discharges or other conditions may result in significant unanticipated expenditures, which would adversely affect our business and results of operations.

        Rent control or rent stabilization legislation and other regulatory restrictions may limit our ability to increase rents or dispose of our properties. Certain states and municipalities have adopted laws and regulations specifically regulating the ownership and operation of manufactured home communities. These laws and regulations include provisions imposing restrictions on the timing or amount of rent increases and granting to community residents a right of first refusal on a sale of their community by the owner to a third party. Enactments of similar laws and regulations have been or may be considered from time to time in other jurisdictions. We currently own 8,475 homesites in two states that have rent control regulations, Florida and California. These communities represent 9.8% of our total communities and 13.3% of our total homesites. We presently expect to continue to operate manufactured home communities, and may in the future acquire manufactured home communities, in areas that either are subject to one or more of these types of laws or regulations or in which legislation with respect to such laws or regulations may be enacted in the future. Laws and regulations regulating landlord/tenant relationships or otherwise relating to the ownership and operation of manufactured home communities, whether existing law or enacted in the future, could limit our ability to increase rents or recover increases in our operating expenses and could make it more difficult for us to dispose of properties in certain circumstances.

        Costs associated with complying with the Americans with Disabilities Act of 1990 may result in unanticipated expenses. Under the Americans with Disabilities Act of 1990, or ADA, all places of public accommodation are required to meet certain federal requirements related to access and use by disabled persons. These requirements became effective in 1992. A number of additional federal, state and local laws may also require modifications to our properties, or restrict certain further renovations of the properties, with respect to access thereto by disabled persons. For example, the Fair Housing Amendments Act of 1988, or FHAA, requires apartment properties first occupied after March 13, 1990 to be accessible to the handicapped. Noncompliance with the ADA or the FHAA could result in the imposition of fines or an award of damages to private litigants and also could result in an order to correct any non-complying feature, which could result in substantial capital expenditures. Although we believe that our properties are substantially in compliance with present requirements, we have not conducted an audit or investigation of all of our properties to determine our compliance and we cannot predict the ultimate cost of compliance with the ADA, the FHAA or other legislation. If one or more of our communities is not in compliance with the ADA, the FHAA or other legislation, then we would be required to incur additional costs to bring the community into compliance. If we incur substantial costs to comply with the ADA, the FHAA or other legislation, our financial condition, results of operations, cash flow, per share trading price of our common stock and our ability to satisfy our debt service obligations and to pay distributions could be adversely affected.

        We may incur significant costs complying with other regulations applicable to our business. The properties in our portfolio are subject to various federal, state and local regulatory requirements, such as state and local fire, life-safety and utility compliance requirements. If we fail to comply with these various requirements, we might incur governmental fines or private damage awards. We believe that the properties in our portfolio are currently in material compliance with all applicable regulatory requirements. However, we do not know whether existing requirements will change or whether future requirements will require us to make significant unanticipated expenditures that could adversely affect our net income, FFO, cash flow and financial condition, ability to satisfy our debt service obligations, the per share trading price of our common stock and ability to make distributions to our stockholders.

        Expansion of our existing communities entails certain risks which may negatively affect our operating results. We may expand our existing communities where a community contains adjacent undeveloped land and where the land is zoned for manufactured housing. The manufactured home community

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expansion business involves significant risks in addition to those involved in the ownership and operation of established manufactured home communities, including the risks that financing may not be available on favorable terms for expansion projects, that the cost of construction may exceed estimates or budgets, that construction and lease-up may not be completed on schedule resulting in increased debt service expense and construction costs, that long-term financing may not be available on completion of construction, and that homesites may not be leased on profitable terms or at all. In connection with any expansion of our existing communities, if any of the above occurred our financial condition, results of operations and ability to make expected distributions to stockholders could be adversely affected.

        Exposure to mold and contamination-related claims could adversely affect our results of operations. We own a significant number of rental homes, which we lease to third parties. In each of these rental homes, we run a risk of mold, mildew and/or fungus related claims if these items are found in any home. In addition, we provide water and sewer systems in our communities and we run the risk that if a home is not properly connected to a system, or if the integrity of the system is breached, mold or other contamination can develop. If this were to occur, we could incur significant remedial costs and we may also be subject to private damage claims and awards, which could be material. If we become subject to claims in this regard, it could adversely affect our financial condition, results of operations and insurability, which could adversely affect our stock price and our ability to make distributions to our stockholders.

Risks Related to Our Debt Financings

        We are subject to the risks normally associated with debt financing, including the risk that payments of principal and interest on borrowings may leave us with insufficient cash to operate our communities or to pay our current quarterly distributions or any distributions necessary to maintain our REIT status. As of December 31, 2004, we had approximately $1.0 billion of outstanding indebtedness, all of which was secured. We expect to incur additional debt in the future to the extent necessary to fund our future cash needs, including making additional borrowings under our revolving credit facility or additional borrowings pursuant to other available financing sources. Additionally, we do not anticipate that our internally generated cash flow will be adequate to repay our existing indebtedness upon maturity and, therefore, we expect to repay our indebtedness through refinancing and equity offerings. Further, we may need to borrow funds to maintain our current rate of quarterly cash distributions or to make distributions required to maintain our REIT status.

        Our level of debt and the limitations imposed on us by our debt agreements could have significant adverse consequences, including the following:

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        We could become more highly leveraged because our organizational documents contain no limitation on the amount of debt we may incur. Our organizational documents contain no limitations on the amount of indebtedness that we or our operating partnership may incur. Although we intend to maintain a balance between our total outstanding indebtedness and the value of our portfolio, we could alter this balance at any time. If we become more highly leveraged, then the resulting increase in debt service could adversely affect our ability to make payments on our outstanding indebtedness and to pay our anticipated distributions and/or any distributions required to maintain our REIT status.

        Increases in interest rates may increase our interest expense, which would adversely affect our cash flow, our ability to service our indebtedness and our ability to make distributions to our stockholders. As of December 31, 2004, approximately 23% of our debt was subject to variable interest rates. An increase in interest rates could increase our interest expense, which would adversely affect our cash flow, our ability to service our indebtedness and our ability to make distributions to our stockholders. As of December 31, 2004, we had a total of $229.9 million of variable rate debt bearing a weighted average interest rate of approximately 5.66% per annum. On February 26, 2004 we entered into a two-year interest rate swap agreement pursuant to which we effectively fixed the base rate portion of the interest rate with respect to $100 million of our variable rate debt. As a result, as of December 31, 2004, approximately 13% of our total indebtedness was subject to variable interest rates for a minimum of two years.

        Failure to hedge effectively against interest rate changes may adversely affect our results of operations. We seek to manage our exposure to interest rate volatility by using interest rate hedging arrangements that involve risks, such as the risk that counterparties may fail to honor their obligations under these arrangements, and that these arrangements may not be effective in reducing our exposure to interest rate changes. Failure to hedge effectively against interest rate changes may adversely affect our financial condition, results of operations and ability to make distributions to our stockholders.

        Our growth depends on external sources of capital which are outside of our control. In order to maintain our qualification as a REIT, we are required under the Internal Revenue Code to annually distribute at least 90% of our REIT taxable income, determined without regard to the dividends paid deduction and excluding any net capital gain. In addition, we will be subject to income tax at regular corporate rates to the extent that we distribute less than 100% of our REIT taxable income, including any net capital gains. Because of these distribution requirements, we may not be able to fund future capital needs, including any necessary acquisition financing, from operating cash flow. Consequently, we rely on third-party sources to fund our capital needs. We may not be able to obtain the financing on favorable terms or at all. Any additional debt we incur will increase our leverage. Our access to third-party sources of capital depends, in part, on:

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        If we cannot obtain capital from third-party sources, we may not be able to acquire properties when strategic opportunities exist, satisfy our debt service obligations or make the cash distributions to our stockholders necessary to maintain our qualification as a REIT.

Risks Related to Organizational and Corporate Structure

        Our business could be harmed if key personnel terminate their employment with us. Our success is dependent on the efforts of our executive officers and senior management team. The top four members of our senior management team have in excess of 31 years of combined experience in the manufactured housing industry. While we believe that we could find replacements for these key personnel, the loss of their services could materially and adversely affect our operations. We currently own and are the beneficiary of "key-man" life insurance for Scott D. Jackson, our Chairman and Chief Executive Officer, and we have entered into employment agreements with both Mr. Jackson and John G. Sprengle, our Vice Chairman.

        We may change our investment and financing strategies and enter into new lines of business without stockholder consent, which may result in riskier investments than our current investments. We may change our investment and financing strategies and enter into new lines of business at any time without the consent of our stockholders, which could result in our making investments and engaging in business activities that are different from, and possibly riskier than, the investments and businesses described in this prospectus. A change in our investment strategy or our entry into new lines of business may increase our exposure to interest rate and other risk or real estate market fluctuations.

        Our failure to qualify as a REIT would result in higher tax expenses and reduced cash available for distribution to our stockholders. Although we believe that we have operated and will continue to operate in a manner that enables us to meet the requirements for qualification as a REIT for U.S. federal income tax purposes, no assurance can be given that we are organized or will continue to operate in a manner so as to qualify or remain so qualified. Qualification as a REIT involves the satisfaction of numerous requirements (some on an annual and quarterly basis) established under highly technical and complex provisions of the Internal Revenue Code for which there are only limited judicial or administrative interpretations, and involve the determination of various factual matters and circumstances not entirely within our control.

        If we fail to qualify as a REIT in any taxable year, we would not be allowed a deduction for dividends paid to our stockholders in computing our taxable income and would be subject to U.S. federal income tax (including any applicable alternative minimum tax) on our taxable income at corporate tax rates. Moreover, unless entitled to relief under certain statutory provisions, we also would be disqualified from electing to be a REIT for the four taxable years following the year during which our qualification is lost. This treatment would reduce our net earnings available for investment or distribution to our stockholders because of the additional tax liability to us for the years involved. See "U.S. Federal Income Tax Considerations." As a result of the additional U.S. federal income tax liability, we might need to borrow funds or liquidate certain investments on terms that may be disadvantageous to us in order to pay the applicable tax, and we would not be compelled to make distributions under the Internal Revenue Code.

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        Joint venture investments could be adversely affected by our lack of sole decision-making authority, our reliance on co-venturer's financial condition and disputes between us and our co-venturers. We may co-invest in the future with third parties through partnerships, joint ventures or other entities, acquiring non-controlling interests in or sharing responsibility for managing the affairs of a property, partnership, joint venture or other entity. In such event, we would not be in a position to exercise sole decision-making authority regarding the property, partnership, joint venture or other entity. Investments in partnerships, joint ventures, or other entities may, under certain circumstances, involve risks not present were a third party not involved, including the possibility that partners or co-venturers might become bankrupt or fail to fund their share of required capital contributions. Partners or co-venturers may have economic or other business interests or goals which are inconsistent with our business interests or goals, and may be in a position to take actions contrary to our policies or objectives. Such investments may also have the potential risk of impasses on decisions, such as a sale, because neither we nor the partner or co-venturer would have full control over the partnership or joint venture. Disputes between us and partners or co-venturers may result in litigation or arbitration that would increase our expenses and prevent our officers and/or directors from focusing their time and effort on our business. Consequently, actions by or disputes with partners or co-venturers might result in subjecting properties owned by the partnership or joint venture to additional risk. In addition, we may in certain circumstances be liable for the actions of our third-party partners or co-venturers. We will seek to maintain sufficient control of such entities to permit them to achieve our business objectives.

        Our Chief Executive Officer has outside business interests which could require time and attention. Scott D. Jackson, our Chairman and Chief Executive Officer, has outside business interests which include his ownership of Global Mobile Limited Liability Company, or Global Mobile, and JJ&T Enterprises, Inc., or JJ&T, both of which, through a commonly owned subsidiary, Global E, own and operate manufactured home communities. In addition, Mr. Jackson's employment agreement includes an exception to his non-competition covenant pursuant to which Mr. Jackson is permitted to devote time to the management and operations of Global Mobile and JJ&T, consistent with past practice. Although Mr. Jackson's employment agreement requires that he devote substantially his full business time and attention to our company, this agreement also permits Mr. Jackson to devote time to his outside business interests consistent with past practice. As a result, these outside business interests could potentially interfere with Mr. Jackson's ability to devote time to our business and affairs.

        Conflicts of interest could arise as a result of our relationship with our operating partnership. Conflicts of interest could arise in the future as a result of the relationships between us and our affiliates, on the one hand, and our operating partnership or any partner thereof, on the other. Our directors and officers have duties to our company and our stockholders under applicable Maryland law in connection with their management of our company. At the same time, we, as general partner, have fiduciary duties to our operating partnership and to the limited partners under Delaware law in connection with the management of our operating partnership. Our duties as general partner to our operating partnership and its partners may come into conflict with the duties of our directors and officers to our company and our stockholders. The partnership agreement of our operating partnership does not require us to resolve such conflicts in favor of either our stockholders or the limited partners in our operating partnership.

        Unless otherwise provided for in the relevant partnership agreement, Delaware law generally requires a general partner of a Delaware limited partnership to adhere to fiduciary duty standards under which it owes its limited partners the highest duties of good faith, fairness and loyalty and which generally prohibit such general partner from taking any action or engaging in any transaction as to which it has a conflict of interest.

        Additionally, the partnership agreement expressly limits our liability by providing that we, and our officers and directors, will not be liable or accountable in damages to our operating partnership, the limited partners or assignees for errors in judgment, mistakes of fact or law or for any act or omission

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if we, or such director or officer, acted in good faith. In addition, our operating partnership is required to indemnify us, our affiliates and each of our respective officers, directors, employees and agents to the fullest extent permitted by applicable law against any and all losses, claims, damages, liabilities, joint or several, expenses, judgments, fines and other actions incurred by us or such other persons, provided that our operating partnership will not indemnify for (i) willful misconduct or a knowing violation of the law or (ii) any transaction for which such person received an improper personal benefit in violation or breach of any provision of the partnership agreement.

        The provisions of Delaware law that allow the common law fiduciary duties of a general partner to be modified by a partnership agreement have not been resolved in a court of law, and we have not obtained an opinion of counsel covering the provisions set forth in the partnership agreement that purport to waive or restrict our fiduciary duties that would be in effect under common law were it not for the partnership agreement.

        We may incur adverse consequences if we expand or enter into new non-real estate business ventures. Our operating partnership owns or invests in businesses that currently or may in the future engage in more diverse and riskier ventures, such as the sale of manufactured homes and financing of manufactured home sales on a broader scale (rather than only to customers in our communities), inventory financing, sales of home improvement products, brokerage of manufactured homes, acting as agent for sales of insurance and related products, third-party property management and other non-real estate business ventures that our management and board of directors determine, using reasonable business judgment, will benefit us.

        If we seek to enter into new non-real estate business ventures and to grow our existing non-real estate business ventures we may risk our ability to maintain our REIT status. In addition, this strategy would expose the holders of our securities to more risk than a business strategy in which our operations are limited to real estate business ventures because we do not have the same experience in non-real estate business ventures that we do in the ownership and operation of manufactured home communities and the related businesses we conduct.

        Certain provisions of Maryland law and our organizational documents, including the stock ownership limit imposed by our charter, may inhibit market activity in our stock and could prevent or delay a change in control transaction. Our charter, bylaws, the partnership agreement of our operating partnership and Maryland law contain provisions that may delay, defer or prevent a change of control or other transaction that might involve a premium price for our common stock or otherwise be in the best interest of our stockholders, including supermajority vote and cause requirements for removal of directors and advance notice requirements for director nominations and stockholder proposals.

        Our charter provides that no individual may beneficially own more than 9.8% (in value or number of shares, whichever is more restrictive) of the outstanding shares of our common stock or more than 9.8% in value of our outstanding shares of our stock. These restrictions on transferability and ownership will not apply if the board of directors determines that it is no longer in our best interests to continue to qualify as a REIT. These ownership limits could delay, defer or prevent a change of control or other transaction that might involve a premium price for our common stock or otherwise be in the best interest of our stockholders.

        Our board of directors has the power to issue additional shares of our stock in a manner that may not be in your best interests. Our charter authorizes our board of directors to amend the charter without stockholder approval to increase the total number of authorized shares of stock or the number of shares of stock of any class or series and issue additional common stock, preferred stock or special voting stock. In addition, our board of directors may classify or reclassify any unissued shares of common stock or preferred stock and may set the preferences, rights and other terms of the classified or reclassified shares. Although our board of directors has no intention to do so at the present time, it could issue additional shares of our special voting stock or establish a series of preferred stock that

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could have the effect of delaying, deferring or preventing a change in control or other transaction that might involve a premium price for our common stock or otherwise be in the best interest of our stockholders.

        Our rights and the rights of our stockholders to take action against our directors and officers are limited. Maryland law provides that a director or officer has no liability in that capacity if he or she performs his or her duties in good faith, in a manner he or she reasonably believes to be in our best interests and with the care that an ordinarily prudent person in a like position would use under similar circumstances. In addition, our charter eliminates our directors' and officers' liability to us and our stockholders for money damages except for liability resulting from actual receipt of an improper benefit in money, property or services or active and deliberate dishonesty established by a final judgment and which is material to the cause of action. Our bylaws require us to indemnify our directors and officers for liability resulting from actions taken by them in those capacities to the maximum extent permitted by Maryland law. As a result, we and our stockholders may have more limited rights against our directors and officers than might otherwise exist under common law. In addition, we may be obligated to fund the defense costs incurred by our directors and officers.

        Our management has limited experience operating a public company. Our board of directors and executive officers have overall responsibility for the management and oversight of our business and operations, and, while certain of our officers have extensive experience in real estate marketing, acquisitions, development, management, finance and law, none of them has significant prior experience in operating a public company. We cannot assure you that our past experience will be sufficient to successfully operate our company as a public company.

        To maintain our REIT status, we may be forced to borrow funds on a short-term basis during unfavorable market conditions. To qualify as a REIT, we generally must distribute to our stockholders at least 90% of our REIT taxable income each year, excluding capital gains, and we will be subject to regular corporate income taxes to the extent that we distribute less than 100% of our REIT taxable income each year. In addition, we will be subject to a 4% nondeductible excise tax on the amount, if any, by which distributions paid by us in any calendar year are less than the sum of 85% of our ordinary income, 95% of our capital gain net income and 100% of our undistributed income from prior years. In order to maintain our REIT status and avoid the payment of income and excise taxes, we may need to borrow funds on a short-term basis to meet the REIT distribution requirements even if the then prevailing market conditions are not favorable for these borrowings. These short-term borrowing needs could result from a difference in timing between the actual receipt of cash and inclusion of income for U.S. federal income tax purposes, or the effect of non-deductible capital expenditures, the creation of reserves or required debt or amortization payments.

        Dividends payable by REITs do not generally qualify for the reduced tax rates on qualified dividends. Until tax years beginning after December 31, 2008, certain qualified dividends payable to individual U.S. stockholders (as such term is defined under "U.S. Federal Income Tax Considerations" below) are taxed at 15%. Generally, dividends payable by REITs will not constitute qualified dividends eligible for the reduced rates. The more favorable rates applicable to regular corporate dividends could cause stockholders who are individuals to perceive investments in REITs to be relatively less attractive than investments in the stocks of non-REIT corporations that pay dividends, which could adversely affect the value of the stock of REITs, including our common stock and our preferred stock.

        In addition, the relative attractiveness of real estate in general may be adversely affected by the newly favorable tax treatment given to corporate dividends, which could negatively affect the value of our properties.

        Possible legislative or other actions affecting REITs could adversely affect our stockholders. The rules dealing with federal income taxation are constantly under review by persons involved in the legislative process and by the Internal Revenue Service ("IRS") and the U.S. Treasury Department. Changes to

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the tax law (which changes may have retroactive application) could adversely affect our stockholders. It cannot be predicted whether, when, in what forms, or with what effective dates, the tax laws applicable to us or our stockholders will be changed.

Risks Related to the Offering of Our Common Stock

        Our current periodic cash distribution to our common stockholders may exceed our FFO available to our common stockholders in the future. For the twelve months ended December 31, 2004, our annual cash distribution to our common stockholders exceeded our FFO available to our common stockholders. We funded our annual cash distribution for the year ended December 31, 2004 from our operating cash flow, from cash generated from our senior fixed and variable rate mortgage debt incurred in connection with the completion of our IPO in February 2004, and from other borrowings. Unless our FFO available to common stockholders increases substantially, we will be required to fund future cash distributions to our common stockholders from other borrowings, from sales of some of our properties, or from other available financing sources or we will have to reduce such distributions. If we use working capital or proceeds from such other borrowings, from sales of some of our properties, or from other available financing sources to fund these distributions, this will reduce the availability of these funds for other purposes, including the purchase of homes necessary to implement our programs for increasing our occupancy, which could negatively impact our financial condition and results from operations and our ability to expand our business and further fund our growth initiatives.

        An increase in interest rates may have an adverse effect on the price of our common stock. One of the factors that may influence the price of our common stock in the public market will be the annual distributions to stockholders relative to the prevailing market price of our common stock. An increase in market interest rates, which are currently at low levels relative to historical rates, may lead prospective purchasers of our common stock to expect a higher dividend yield and higher interest rates would likely increase our borrowing costs and potentially decrease funds available for distribution. Thus, higher market interest rates could adversely affect the market price of our common stock.

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FORWARD LOOKING STATEMENTS

        This prospectus and the documents incorporated by reference herein include "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, as amended by the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts, included in this prospectus that address results or developments that ARC expects or anticipates will or may occur in the future, where statements are preceded by, followed by or include the words "believes," "expects," "may," "will," "would," "could," "should," "seeks," "approximately," "intends," "plans," "projects," "estimates" or "anticipates" or the negative of these words and phrases or similar words or phrases, including such things as our business strategy, our ability to obtain future financing arrangements, estimates relating to our future distributions, our understanding of our competition, market trends, projected capital expenditures, the impact of technology on our products, operations and business are forward-looking statements.

        The forward-looking statements are based on our beliefs, assumptions and expectations of our future performance taking into account all information currently available to us. These beliefs, assumptions and expectations are subject to risks and uncertainties and can change as a result of many possible events or factors, not all of which are known to us. If a change occurs, our business, financial condition, liquidity and results of operations may vary materially from those expressed in our forward-looking statements. These risks, along with the risks disclosed in the section of this prospectus entitled "Risk Factors" beginning on page 3 and the following factors, could cause actual results to vary from our forward-looking statements: national, regional and local economic climates, future terrorist attacks in the U.S. or abroad, competition from other forms of single or multifamily housing, changes in market rental rates, supply and demand for affordable housing, the cost of acquiring, transporting, setting or selling manufactured homes, the availability of manufactured homes from manufacturers, the availability of financing for us to acquire additional manufactured homes, the ability of manufactured home buyers to obtain financing, our ability to maintain rental rates and maximize occupancy, the level of repossessions by manufactured home lenders, the adverse impact of external factors such as changes in interest rates, inflation and consumer confidence, the ability to identify acquisitions, the pace of acquisitions and/or dispositions of communities and new or rental homes, our corporate debt ratings, demand for home purchases in our communities and demand for financing of such purchases, demand for rental homes in our communities, the condition of capital markets, actual outcome of the resolution of any conflict, our ability to successfully operate acquired properties, our ability to maintain our REIT status, environmental uncertainties and risks related to natural disasters, and changes in and compliance with real estate permitting, licensing and zoning laws including legislation affecting monthly leases and rent control and increases in property taxes.

        Consequently, all of the forward-looking statements made in this prospectus are qualified by these cautionary statements and there can be no assurance that the actual results or developments anticipated by the Company will be realized, or even substantially realized, and that they will have the expected consequences to or effects on the Company and its business or operations. Forward-looking statements made in this prospectus speak as of the date hereof. The Company undertakes no obligation to update or revise any forward-looking statement in this prospectus.

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USE OF PROCEEDS

        We will not receive any proceeds upon any sale of common stock by the selling stockholders. All such proceeds will be received by the respective selling stockholders.

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U.S. FEDERAL INCOME TAX CONSIDERATIONS

        The following is a summary of the material federal income tax consequences relating to our taxation and qualification as a REIT and an investment in our common stock. For purposes of this section under the heading "U.S. Federal Income Tax Considerations," references to "ARC" mean only Affordable Residential Communities Inc. and not its subsidiaries or other lower-tier entities, except as otherwise indicated. This summary is based upon the Internal Revenue Code, the regulations promulgated by the U.S. Treasury Department, rulings and other administrative pronouncements issued by the IRS, and judicial decisions, all as currently in effect, and all of which are subject to differing interpretations or to change, possibly with retroactive effect. No assurance can be given that the IRS would not assert, or that a court would not sustain, a position contrary to any of the tax consequences described below. No advance ruling has been or will be sought from the IRS regarding any matter discussed in this prospectus. The summary is also based upon the assumption that the operation of ARC, and of its subsidiaries and other lower-tier and affiliated entities, will in each case be in accordance with its applicable organizational documents or partnership agreement. This summary is for general information only, and does not purport to discuss all aspects of federal income taxation that may be important to a particular investor in light of its investment or tax circumstances, or to investors subject to special tax rules, such as:

and, except to the extent discussed below:

        This summary assumes that investors will hold our common stock as capital assets, which generally means as property held for investment.

        THE FEDERAL INCOME TAX TREATMENT OF HOLDERS OF OUR COMMON STOCK DEPENDS IN SOME INSTANCES ON DETERMINATIONS OF FACT AND INTERPRETATIONS OF COMPLEX PROVISIONS OF FEDERAL INCOME TAX LAW FOR WHICH NO CLEAR PRECEDENT OR AUTHORITY MAY BE AVAILABLE. IN ADDITION, THE TAX CONSEQUENCES OF HOLDING ARC COMMON STOCK TO ANY PARTICULAR INVESTOR WILL DEPEND ON THE INVESTOR'S PARTICULAR TAX CIRCUMSTANCES. YOU ARE URGED TO CONSULT YOUR TAX ADVISOR REGARDING THE FEDERAL, STATE, LOCAL, AND FOREIGN INCOME AND OTHER TAX CONSEQUENCES TO YOU, IN LIGHT OF YOUR PARTICULAR INVESTMENT OR TAX CIRCUMSTANCES, OF ACQUIRING, HOLDING, EXCHANGING, OR OTHERWISE DISPOSING OF OUR COMMON STOCK.

Taxation of ARC

        ARC elected to be taxed as a REIT under the Internal Revenue Code, commencing with its taxable year ended December 31, 1998. ARC believes that it was organized and has operated in a

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manner so as to qualify as a REIT, and intends to continue to be organized and operate in such a manner.

        The law firm of Skadden, Arps, Slate, Meagher & Flom LLP has acted as our tax counsel in connection with our concurrent offerings. We have received the opinion of Skadden, Arps, Slate, Meagher & Flom LLP to the effect that beginning with our taxable year ended December 31, 1998 through April 29, 2005, ARC has been organized and operated in conformity with the requirements for qualification and taxation as a REIT under the Internal Revenue Code, and that its proposed method of operation will enable it to continue to meet the requirements for qualification and taxation as a REIT. It must be emphasized that the opinion of Skadden, Arps, Slate, Meagher & Flom LLP is based on various assumptions relating to the organization and operation of ARC, and is conditioned upon representations and covenants made by the management of ARC and affiliated entities regarding its organization, assets, and the past, present and future conduct of its business operations. While ARC believes that it is qualified and operated as a REIT, and intends to continue to operate so that it will qualify as a REIT, given the highly complex nature of the rules governing REITs, the ongoing importance of factual determinations, and the possibility of future changes in the circumstances of ARC, no assurance can be given by Skadden, Arps, Slate, Meagher & Flom LLP or ARC that ARC will so qualify for any particular year. Skadden, Arps, Slate, Meagher & Flom LLP will have no obligation to advise ARC or the holders of ARC common stock of any subsequent change in the matters stated, represented or assumed, or of any subsequent change in the applicable law. You should be aware that opinions of counsel are not binding on the IRS, and no assurance can be given that the IRS will not challenge the conclusions set forth in such opinions.

        Qualification and taxation as a REIT depends on the ability of ARC to meet, on a continuing basis, through actual operating results, distribution levels, and diversity of stock ownership, various qualification requirements imposed upon REITs by the Internal Revenue Code, the compliance with which will not be reviewed by Skadden, Arps, Slate, Meagher & Flom LLP. ARC's ability to qualify as a REIT also requires that it satisfy certain asset tests, some of which depend upon the fair market values of assets directly or indirectly owned by ARC. ARC's ability to qualify as a REIT also requires that it satisfy certain asset tests, some of which depend upon the fair market values of assets directly or indirectly owned by ARC. Such values may not be susceptible to a precise determination. Accordingly, no assurance can be given that the actual results of ARC's operations for any taxable year satisfy such requirements for qualification and taxation as a REIT.

        As indicated above, qualification and taxation as a REIT depends upon the ability of ARC to meet, on a continuing basis, various qualification requirements imposed upon REITs by the Internal Revenue Code. The material qualification requirements are summarized below under "—Requirements for Qualification—General." While ARC intends to operate so that it qualifies as a REIT, no assurance can be given that the IRS will not challenge its qualification, or that it will be able to operate in accordance with the REIT requirements in the future. See "—Failure to Qualify."

        Provided that ARC qualifies as a REIT, it will generally be entitled to a deduction for dividends that it pays and therefore will not be subject to federal corporate income tax on its net income that is currently distributed to its stockholders. This treatment substantially eliminates the "double taxation" at the corporate and stockholder levels that results generally from investment in a corporation. Rather, income generated by a REIT generally is taxed only at the stockholder level upon a distribution of dividends by the REIT.

        The Jobs and Growth Tax Relief Reconciliation Act of 2003, which we refer to in this prospectus as the "2003 Act", generally lowers the rate at which stockholders who are individual U.S. stockholders (as defined below) are taxed on corporate dividends to a maximum of 15% (the same as long-term

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capital gains), for the 2003 through 2008 tax years, thereby substantially reducing, though not completely eliminating, the double taxation that has historically applied to corporate dividends. With limited exceptions, however, dividends received by individual U.S. stockholders (as defined below) from ARC or from other entities that are taxed as REITs will continue to be taxed at rates applicable to ordinary income, which, pursuant to the 2003 Act, will be as high as 35% through 2010.

        Net operating losses, foreign tax credits and other tax attributes of a REIT generally do not pass through to the stockholders of the REIT, subject to special rules for certain items such as capital gains recognized by REITs. See "—Taxation of Stockholders."

        If ARC qualifies as a REIT, it will nonetheless be subject to federal tax in the following circumstances:

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        In addition, ARC and its subsidiaries may be subject to a variety of taxes, including payroll taxes and state, local, and foreign income, property and other taxes on their assets and operations. ARC could also be subject to tax in situations and on transactions not presently contemplated.

        The Internal Revenue Code defines a REIT as a corporation, trust or association:


        The Internal Revenue Code provides that conditions (1) through (4) must be met during the entire taxable year, and that condition (5) must be met during at least 335 days of a taxable year of 12 months, or during a proportionate part of a shorter taxable year. ARC's charter provides restrictions regarding the ownership and transfer of its shares, which are intended to assist in satisfying the share ownership requirements described in conditions (5) and (6) above. For purposes of condition (6), an "individual" generally includes a supplemental unemployment compensation benefit plan, a private foundation, or a portion of a trust permanently set aside or used exclusively for charitable purposes, but does not include a qualified pension plan or profit sharing trust.

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        To monitor compliance with the share ownership requirements, ARC is generally required to maintain records regarding the actual ownership of its shares. To do so, ARC must demand written statements each year from the record holders of significant percentages of its stock in which the record holders are to disclose the actual owners of the shares (i.e., the persons required to include in gross income the dividends paid by ARC). A list of those persons failing or refusing to comply with this demand must be maintained as part of the records of ARC. Failure by ARC to comply with these record-keeping requirements could subject it to monetary penalties. If ARC satisfies these requirements and has no reason to know that condition (6) is not satisfied, it will be deemed to have satisfied such condition. A stockholder that fails or refuses to comply with the demand is required by Treasury regulations to submit a statement with its tax return disclosing the actual ownership of the shares and other information.

        In addition, a corporation generally may not elect to become a REIT unless its taxable year is the calendar year. ARC satisfies this requirement.

        The Code provides relief from violations of the REIT gross income requirements, as described below under "—Income Tests," in cases where a violation is due to reasonable cause and not willful neglect, and other requirements are met, including the payment of a penalty tax that is based upon the magnitude of the violation. In addition, the recently enacted American Jobs Creation Act of 2004 (the "2004 Act") includes provisions that extend similar relief in the case of certain violations of the REIT asset requirements (see "—Asset Tests" below) and other REIT requirements, again provided that the violation is due to reasonable cause and not willful neglect, and other conditions are met, including the payment of a penalty tax. These provisions of the 2004 Act become effective beginning with the 2005 tax year. If ARC fails to satisfy any of the various REIT requirements, there can be no assurance that these relief provisions would be available to enable it to maintain its qualification as a REIT, and, if available, the amount of any resultant penalty tax could be substantial.

        Ownership of Partnership Interests.    In the case of a REIT that is a partner in a partnership, Treasury regulations provide that the REIT is deemed to own its proportionate share of the partnership's assets, and to earn its proportionate share of the partnership's gross income based on its pro-rata share of capital interest in the partnership, for purposes of the asset and gross income tests applicable to REITs as described below. In addition, the assets and gross income of the partnership generally are deemed to retain the same character in the hands of the REIT. Thus, ARC's proportionate share, based upon its percentage capital interest, of the assets and items of income of partnerships in which it owns an equity interest (including its interest in our operating partnership and its equity interests in lower-tier partnerships), is treated as assets and items of income of ARC for purposes of applying the REIT requirements described below. Consequently, to the extent that ARC directly or indirectly holds a preferred or other equity interest in a partnership, the partnership's assets and operations may affect ARC's ability to qualify as a REIT, even though ARC may have no control, or only limited influence, over the partnership. A summary of certain rules governing the federal income taxation of partnerships and their partners is provided below in "—Tax Aspects of Investments in Partnerships."

        Disregarded Subsidiaries.    If a REIT owns a corporate subsidiary that is a "qualified REIT subsidiary," that subsidiary is disregarded for federal income tax purposes, and all assets, liabilities and items of income, deduction and credit of the subsidiary are treated as assets, liabilities and items of income, deduction and credit of the REIT itself, including for purposes of the gross income and asset tests applicable to REITs as summarized below. A qualified REIT subsidiary is any corporation, other than a "taxable REIT subsidiary" (as described below), that is wholly owned by a REIT, or by other disregarded subsidiaries, or by a combination of the two. Single member limited liability companies that are wholly-owned by a REIT are also generally disregarded as separate entities for federal income tax

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purposes, including for purposes of the REIT income and asset tests. Disregarded subsidiaries, along with partnerships in which ARC holds an equity interest, are sometimes referred to herein as "pass-through subsidiaries."

        In the event that a disregarded subsidiary of ARC ceases to be wholly owned—for example, if any equity interest in the subsidiary is acquired by a person other than ARC or another disregarded subsidiary of ARC—the subsidiary's separate existence would no longer be disregarded for federal income tax purposes. Instead, it would have multiple owners and would be treated as either a partnership or a taxable corporation. Such an event could, depending on the circumstances, adversely affect ARC's ability to satisfy the various asset and gross income requirements applicable to REITs, including the requirement that REITs generally may not own, directly or indirectly, more than 10% of the securities of another corporation. See "—Asset Tests" and "—Income Tests."

        Taxable Subsidiaries. A REIT, in general, may jointly elect with subsidiary corporations, whether or not wholly owned, to treat the subsidiary corporation as a taxable REIT subsidiary, or TRS. The separate existence of a TRS or other taxable corporation, unlike a disregarded subsidiary as discussed above, is not ignored for federal income tax purposes. Accordingly, such an entity would generally be subject to corporate income tax on its earnings, which may reduce the cash flow generated by ARC and its subsidiaries in the aggregate, and ARC's ability to make distributions to its stockholders.

        A REIT is not treated as holding the assets of a taxable subsidiary corporation or as receiving any income that the subsidiary earns. Rather, the stock issued by the subsidiary is an asset in the hands of the REIT, and the REIT recognizes as income, the dividends, if any, that it receives from the subsidiary. This treatment can affect the income and asset test calculations that apply to the REIT, as described below. Because a parent REIT does not include the assets and income of such subsidiary corporations in determining the parent's compliance with the REIT requirements, such entities may be used by the parent REIT to undertake indirectly activities that the REIT rules might otherwise preclude it from doing directly or through pass-through subsidiaries (for example, providing non-customary services to tenants of the REIT's properties (see "—Income Tests," below), and activities that give rise to certain categories of income such as management fees or foreign currency gains).

        Certain restrictions imposed on a TRS are intended to ensure that such entities will be subject to appropriate levels of federal income taxation. First, a TRS may not deduct interest payments made in any year to an affiliated REIT to the extent that such payments exceed, generally, 50% of the TRS's adjusted taxable income for that year (although the TRS may carry forward to, and deduct in, a succeeding year the disallowed interest amount if the 50% test is satisfied in that year). In addition, if a TRS pays interest, rent, or another amount to a REIT that exceeds the amount that would be paid to an unrelated party in an arm's-length transaction, the REIT generally will be subject to an excise tax equal to 100% of such excess. ARC has made TRS elections with respect to its ownership interest in several corporate subsidiaries since January 2001.

        In order to maintain qualification as a REIT, ARC annually must satisfy two gross income requirements. First, at least 75% of ARC's gross income for each taxable year, excluding gross income from sales of inventory or dealer property in "prohibited transactions," must be derived from investments relating to real property or mortgages on real property, including "rents from real property," dividends received from other REITs, interest income derived from mortgage loans secured by real property (including certain types of mortgage backed securities), and gains from the sale of real estate assets, as well as income from some kinds of temporary investments. Second, at least 95% of ARC's gross income in each taxable year, excluding gross income from prohibited transactions, must be derived from some combination of income that qualifies under the 75% income test described above,

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as well as other dividends, interest, and gain from the sale or disposition of stock or securities, which need not have any relation to real property.

        Interest income constitutes qualifying mortgage interest for purposes of the 75% income test (as described above) to the extent that the obligation is secured by a mortgage on real property. If ARC receives interest income with respect to a mortgage loan that is secured by both real property and other property, and the highest principal amount of the loan outstanding during a taxable year exceeds the fair market value of the real property on the date that ARC acquired or originated the mortgage loan, the interest income will be apportioned between the real property and the other collateral, and ARC's income from the arrangement will qualify for purposes of the 75% income test only to the extent that the interest is allocable to the real property. Even if a loan is not secured by real property, or is undersecured, the income that it generates may nonetheless qualify for purposes of the 95% income test.

        To the extent that the terms of a loan provide for contingent interest that is based on the cash proceeds realized upon the sale of the property securing the loan (a "shared appreciation provision"), income attributable to the participation feature will be treated as gain from sale of the underlying property, which generally will be qualifying income for purposes of both the 75% and 95% gross income tests, provided that the property is not inventory or dealer property in the hands of the borrower or the REIT.

        To the extent that a REIT derives interest income from a mortgage loan or income from the rental of real property where all or a portion of the amount of interest or rental income payable is contingent, such income generally will qualify for purposes of the gross income tests only if it is based upon the gross receipts or sales, and not the net income or profits of any person. This limitation does not apply, however, where the borrower or lessee leases substantially all of its interest in the property to tenants or subtenants, to the extent that the rental income derived by the borrower or lessee, as the case may be, would qualify as rents from real property had it been earned directly by a REIT, as described below.

        Rents received by ARC will qualify as "rents from real property" in satisfying the gross income requirements described above, only if several conditions are met, including the following. If rent is partly attributable to personal property leased in connection with a lease of real property, the portion of the total rent that is attributable to the personal property will not qualify as "rents from real property" unless it constitutes 15% or less of the total rent received under the lease. Moreover, for rents received to qualify as "rents from real property," the REIT generally must not operate or manage the property or furnish or render certain services to the tenants of such property, other than through an "independent contractor" who is adequately compensated and from which the REIT derives no revenue or through a TRS, as discussed below. ARC and its affiliates are permitted, however, to perform services that are "usually or customarily rendered" in connection with the rental of space for occupancy only and are not otherwise considered rendered to the occupant of the property. In addition, ARC and its affiliates may directly or indirectly provide non-customary services to tenants of its properties without disqualifying all of the rent from the property if the payment for such services does not exceed 1% of the total gross income from the property. In such a case, only the amounts for non-customary services are not treated as rents from real property. The rest of the rent will be qualifying income. For purposes of this test, the income received from such non-customary services is deemed to be at least 150% of the direct cost of providing the services. Moreover, ARC is permitted to provide services to tenants or others through a TRS without disqualifying the rental income received from tenants for purposes of the REIT income requirements. Also, rental income will qualify as rents from real property only to the extent that ARC does not directly or constructively own, (i) in the case of any lessee which is a corporation, stock possessing 10% or more of the total combined voting power of all classes of stock entitled to vote, or 10% or more of the total value of shares of all classes of

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stock of such lessee; or (ii) in the case of any lessee which is not a corporation, an interest of 10% or more in the assets or net profits of such lessee.

        ARC may indirectly receive distributions from TRSs or other corporations that are not REITs or qualified REIT subsidiaries. These distributions will be classified as dividend income to the extent of the earnings and profits of the distributing corporation. Such distributions will generally constitute qualifying income for purposes of the 95% gross income test, but not under the 75% gross income test. Any dividends received by ARC from a REIT will be qualifying income in ARC's hands for purposes of both the 95% and 75% income tests.

        Any income or gain derived by ARC or its pass-through subsidiaries from instruments that hedge certain risks, such as the risk of changes in interest rates, will not be treated as non-qualifying income for purposes of the 95% gross income test, provided that specified requirements are met, but generally will constitute non-qualifying income for purposes of the 75% gross income test. Such requirements include that the instrument hedges risks associated with indebtedness issued by ARC or its pass-through subsidiaries that is incurred to acquire or carry "real estate assets" (as described below under "—Asset Tests"), and that the instrument is properly identified as a hedge, along with the risk that it hedges, within prescribed time periods. Otherwise, such income will generally constitute non-qualifying income for purposes of the 95% and 75% gross income tests.

        If ARC fails to satisfy one or both of the 75% or 95% gross income tests for any taxable year, it may still qualify as a REIT for the year if it is entitled to relief under applicable provisions of the Internal Revenue Code. These relief provisions will generally be available if the failure of ARC to meet these tests was due to reasonable cause and not due to willful neglect, ARC attaches to its federal income tax return a schedule of the sources of its income, and any incorrect information on the schedule was not due to fraud with intent to evade tax. It is not possible to state whether ARC would be entitled to the benefit of these relief provisions in all circumstances. If these relief provisions are inapplicable to a particular set of circumstances involving ARC, ARC will not qualify as a REIT. As discussed above under "—Taxation of REITs in General," even where these relief provisions apply, a tax would be imposed upon the amount by which ARC fails to satisfy the particular gross income test.

        ARC, at the close of each calendar quarter, must also satisfy four tests relating to the nature of its assets. First, at least 75% of the value of the total assets of ARC must be represented by some combination of "real estate assets," cash, cash items, U.S. government securities, and, under some circumstances, stock or debt instruments purchased with new capital. For this purpose, real estate assets include interests in real property, such as land, buildings, leasehold interests in real property, stock of other corporations that qualify as REITs, and certain kinds of mortgage backed securities and mortgage loans. Assets that do not qualify for purposes of the 75% test are subject to the additional asset tests described below.

        The second asset test is that the value of any one issuer's securities owned by ARC may not exceed 5% of the value of ARC's gross assets. Third, ARC may not own more than 10% of any one issuer's outstanding securities, as measured by either voting power or value. The 5% and 10% asset tests do not apply to securities of TRSs and qualified REIT subsidiaries, and the 10% value test does not apply to "straight debt" having specified characteristics. Fourth, the aggregate value of all securities of TRSs held by a REIT may not exceed 20% of the value of the REIT's gross assets.

        If a REIT holds indebtedness issued by a partnership, the indebtedness will be subject to, and may cause a violation, of the asset tests, unless it is a qualifying mortgage asset or other conditions are met.

        Any interests held by a REIT in a real estate mortgage investment conduit, or REMIC, are generally treated as qualifying real estate assets, and income derived by a REIT from interests in

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REMICs is generally treated as qualifying income for purposes of the REIT income tests described above. If less than 95% of the assets of a REMIC are real estate assets, however, then only a proportionate part of the REIT's interest in the REMIC, and its income derived from the interest, qualifies for purposes of the REIT asset and income tests. Where a REIT holds a "residual interest" in a REMIC from which it derives "excess inclusion income," the REIT will be required to either distribute the excess inclusion income or pay tax on it (or a combination of the two), even though the income may not be received in cash by the REIT.

        The 2004 Act contains a number of provisions applicable to REITs, including relief provisions that make it easier for REITs to satisfy the asset requirements, or to maintain REIT qualification notwithstanding certain violations of the asset and other requirements. These provisions are generally effective beginning with the 2005 tax year, except as otherwise noted below.

        One such provision allows a REIT which fails one or more of the asset requirements to nevertheless maintain its REIT qualification if (a) it provides the IRS with a description of each asset causing the failure, (b) the failure is due to reasonable cause and not willful neglect, (c) the REIT pays a tax equal to the greater of (i) $50,000 per failure, and (ii) the product of the net income generated by the assets that caused the failure multiplied by the highest applicable corporate tax rate (currently 35%), and (d) the REIT either disposes of the assets causing the failure within 6 months after the last day of the quarter in which it identifies the failure, or otherwise satisfies the relevant asset tests within that time frame.

        A second relief provision contained in the 2004 Act applies to de minimis violations of the 10% and 5% asset tests. A REIT may maintain its qualification despite a violation of such requirements if (a) the value of the assets causing the violation do not exceed the lesser of 1% of the REIT's total assets, and $10,000,000, and (b) the REIT either disposes of the assets causing the failure within 6 months after the last day of the quarter in which it identifies the failure, or the relevant tests are otherwise satisfied within that time frame.

        The 2004 Act also provides that certain securities will not cause a violation of the 10% value test described above. Such securities include instruments that constitute "straight debt," which now has an expanded definition and includes securities having certain contingency features. A newly enacted restriction, however, precludes a security from qualifying as "straight debt" where a REIT (or a controlled TRS of the REIT) owns other securities of the issuer of that security which do not qualify as straight debt, unless the value of those other securities constitute, in the aggregate, 1% or less of the total value of that issuer's outstanding securities. In addition to straight debt, the 2004 Act provides that certain other securities will not violate the 10% value test. Such securities include (a) any loan made to an individual or an estate, (b) certain rental agreements in which one or more payments are to be made in subsequent years (other than agreements between a REIT and certain persons related to the REIT), (c) any obligation to pay rents from real property, (d) securities issued by governmental entities that are not dependent in whole or in part on the profits of (or payments made by) a non-governmental entity, (e) any security issued by another REIT, and (f) any debt instrument issued by a partnership if the partnership's income is of a nature that it would satisfy the 75% gross income test described above under "—Income Tests." The 2004 Act also provides that in applying the 10% value test, a debt security issued by a partnership is not taken into account to the extent, if any, of the REIT's proportionate equity interest in that partnership. Each of the changes described in this paragraph that were made by the 2004 Act have retroactive effect beginning with the 2001 tax year.

        ARC believes that its holdings of securities and other assets will comply with the foregoing REIT asset requirements, and it intends to monitor compliance on an ongoing basis. Moreover, values of some assets may not be susceptible to a precise determination, and values are subject to change in the future. Furthermore, the proper classification of an instrument as debt or equity for federal income tax purposes may be uncertain in some circumstances, which could affect the application of the REIT asset

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requirements. Accordingly, there can be no assurance that the IRS will not contend that ARC's interests in subsidiaries or in the securities of other issuers will cause a violation of the REIT asset requirements.

        In order to qualify as a REIT, ARC is required to distribute dividends, other than capital gain dividends, to its stockholders in an amount at least equal to:

        These distributions generally must be paid in the taxable year to which they relate, or in the following taxable year if such distributions are declared in October, November or December of the taxable year, payable to stockholders of record on a specified date in any such month, and are actually paid before the end of January of the following year. Such distributions are treated as both paid by ARC and received by each stockholder on December 31 of the year in which they are declared. In addition, at the election of ARC, a distribution for a taxable year may be declared before ARC timely files its tax return for the year and paid with or before the first regular dividend payment after such declaration, provided such payment is made during the 12-month period following the close of such taxable year. These distributions are taxable to the stockholders in the year in which paid, even though the distributions relate to ARC's prior taxable year for purposes of the 90% distribution requirement. In order for distributions to be counted for this purpose, and to give rise to a tax deduction by ARC, they must not be "preferential dividends." A dividend is not a preferential dividend if it is pro rata among all outstanding shares of stock within a particular class, and is in accordance with the preferences among different classes of stock as set forth in the organizational documents.

        To the extent that ARC distributes at least 90%, but less than 100%, of its "REIT taxable income," as adjusted, it will be subject to tax at ordinary corporate tax rates on the retained portion. ARC may elect to retain, rather than distribute, its net long-term capital gains and pay tax on such gains. In this case, ARC could elect to have its stockholders include their proportionate share of such undistributed long-term capital gains in income and receive a corresponding credit for their share of the tax paid by ARC. Stockholders would then increase the adjusted basis of their ARC stock by the difference between the designated amounts of capital gains from ARC that they include in their taxable income, and the tax paid on their behalf by ARC with respect to that income.

        To the extent that a REIT has any net operating losses carried forward from prior tax years, such losses may reduce the amount of distributions that it must make in order to comply with the REIT distribution requirements. Such losses, however, will generally not affect the character, in the hands of stockholders, of any distributions that are actually made by the REIT, which are generally taxable to stockholders to the extent that the REIT has current or accumulated earnings and profits. See "—Taxation of Stockholders—Taxation of Taxable U.S. Stockholders—Distributions."

        If ARC fails to distribute during each calendar year at least the sum of (a) 85% of its REIT ordinary income for such year, (b) 95% of its REIT capital gain net income for such year, and (c) any undistributed taxable income from prior periods, ARC will be subject to a 4% excise tax on the excess of such required distribution over the sum of (x) the amounts actually distributed and (y) the amounts

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of income retained on which it has paid corporate income tax. ARC intends to make timely distributions so that it is not subject to the 4% excise tax.

        It is possible that ARC, from time to time, may not have sufficient cash to meet the distribution requirements due to timing differences between (a) the actual receipt of cash, including receipt of distributions from its subsidiaries, and (b) the inclusion of items in income by ARC for federal income tax purposes. Potential sources of non-cash taxable income include loans or mortgage-backed securities held by ARC as assets that are issued at a discount and require the accrual of taxable economic interest in advance of its receipt in cash, loans on which the borrower is permitted to defer cash payments of interest, and distressed loans on which ARC may be required to accrue taxable interest income even though the borrower is unable to make current servicing payments in cash. In the event that such timing differences occur, in order to meet the distribution requirements, it might be necessary to arrange for short-term, or possibly long-term, borrowings, or to pay dividends in the form of taxable in-kind distributions of property.

        ARC may be able to rectify a failure to meet the distribution requirements for a year by paying "deficiency dividends" to stockholders in a later year, which may be included in ARC's deduction for dividends paid for the earlier year. In this case, ARC may be able to avoid losing its REIT status or being taxed on amounts distributed as deficiency dividends. However, ARC will be required to pay interest and a penalty based on the amount of any deduction taken for deficiency dividends.

        If ARC fails to qualify for taxation as a REIT in any taxable year, and the relief provisions of the Internal Revenue Code described above do not apply, ARC will be subject to tax, including any applicable alternative minimum tax, on its taxable income at regular corporate rates. Distributions to stockholders in any year in which ARC is not a REIT will not be deductible by ARC, nor will they be required to be made. In this situation, to the extent of current and accumulated earnings and profits, distributions to stockholders will generally be taxable in the case of stockholders who are individual U.S. stockholders (as defined below), at preferential rates, pursuant to the 2003 Act, and, subject to limitations of the Internal Revenue Code, dividends in the hands of corporate U.S. stockholders may be eligible for the dividends received deduction. Unless ARC is entitled to relief under specific statutory provisions, ARC will also be disqualified from re-electing to be taxed as a REIT for the four taxable years following the year during which qualification was lost. It is not possible to state whether, in all circumstances, ARC will be entitled to this statutory relief.

        Net income derived from a prohibited transaction is subject to a 100% tax. The term "prohibited transaction" generally includes a sale or other disposition of property (other than foreclosure property) that is held primarily for sale to customers in the ordinary course of a trade or business by a REIT, by a lower-tier partnership in which the REIT holds an equity interest, or by a borrower that has issued a shared appreciation mortgage or similar debt instrument to the REIT. Whether property is held "primarily for sale to customers in the ordinary course of a trade or business" depends on the particular facts and circumstances. No assurance can be given that any particular property in which ARC holds a direct or indirect interest will not be treated as property held for sale to customers, or that certain safe-harbor provisions of the Internal Revenue Code that prevent such treatment will apply. The 100% tax will not apply to gains from the sale of property that is held through a TRS or other taxable corporation, although such income will be subject to tax in the hands of the corporation at regular corporate income tax rates.

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        Foreclosure property is real property and any personal property incident to such real property (i) that is acquired by a REIT as a result of the REIT having bid in the property at foreclosure, or having otherwise reduced the property to ownership or possession by agreement or process of law, after there was a default (or default was imminent) on a lease of the property or a mortgage loan held by the REIT and secured by the property, (ii) for which the related loan or lease was acquired by the REIT at a time when default was not imminent or anticipated, and (iii) for which such REIT makes a proper election to treat the property as foreclosure property. REITs generally are subject to tax at the maximum corporate rate (currently 35%) on any net income from foreclosure property, including any gain from the disposition of the foreclosure property, other than income that would otherwise be qualifying income for purposes of the 75% gross income test. Any gain from the sale of property for which a foreclosure property election has been made will not be subject to the 100% tax on gains from prohibited transactions described above, even if the property would otherwise constitute inventory or dealer property in the hands of the selling REIT. ARC does not anticipate that it will receive any income from foreclosure property that is not qualifying income for purposes of the 75% gross income test, but, if ARC does receive any such income, it intends to make an election to treat the related property as foreclosure property.

Tax Aspects of Investments in Partnerships

        ARC may hold investments through entities that are classified as partnerships for federal income tax purposes, including its interest in our operating partnership and the equity interests in lower-tier partnerships. In general, partnerships are "pass-through" entities that are not subject to federal income tax. Rather, partners are allocated their proportionate shares of the items of income, gain, loss, deduction and credit of a partnership, and are potentially subject to tax on these items, without regard to whether the partners receive a distribution from the partnership. ARC will include in its income its proportionate share of these partnership items for purposes of the various REIT income tests, based on its capital interest in such partnership, and in the computation of its REIT taxable income. Moreover, for purposes of the REIT asset tests, ARC will include its proportionate share of assets held by subsidiary partnerships, based on its capital interest in such partnerships. See "—Taxation of ARC—Effect of Subsidiary Entities—Ownership of Partnership Interests." Consequently, to the extent that ARC holds an equity interest in a partnership, the partnership's assets and operations may affect ARC's ability to qualify as a REIT, even though ARC may have no control, or only limited influence, over the partnership.

        The investment by ARC in partnerships involves special tax considerations, including the possibility of a challenge by the IRS of the status of any of ARC's subsidiary partnerships as a partnership, as opposed to an association taxable as a corporation, for federal income tax purposes. If any of these entities were treated as an association for federal income tax purposes, it would be taxable as a corporation and therefore could be subject to an entity-level tax on its income. In such a situation, the character of the assets of ARC and items of gross income of ARC would change and could preclude ARC from satisfying the REIT asset tests (particularly the tests generally preventing a REIT from owning more than 10% of the voting securities, or more than 10% of the securities by value, of a corporation) or the gross income tests as discussed in "—Taxation of ARC—Asset Tests" and "—Income Tests," and in turn could prevent ARC from qualifying as a REIT, unless it is eligible for relief from the violation pursuant to relief provisions described above. See "—Taxation of ARC—Requirements for Qualification—General," and "—Failure to Qualify," above, for discussion of the effect of the failure to satisfy the REIT tests for a taxable year, and of the relief provisions. In

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addition, any change in the status of any of ARC's subsidiary partnerships for tax purposes might be treated as a taxable event, in which case ARC could have taxable income that is subject to the REIT distribution requirements without receiving any cash.

        Under the Internal Revenue Code and the Treasury regulations, income, gain, loss and deduction attributable to appreciated or depreciated property that is contributed to a partnership in exchange for an interest in the partnership must be allocated for tax purposes in a manner such that the contributing partner is charged with, or benefits from, the unrealized gain or unrealized loss associated with the property at the time of the contribution. The amount of the unrealized gain or unrealized loss is generally equal to the difference between the fair market value of the contributed property at the time of contribution, and the adjusted tax basis of such property at the time of contribution (a "book-tax difference"). Such allocations are solely for federal income tax purposes and do not affect the book capital accounts or other economic or legal arrangements among the partners.

        To the extent that any subsidiary partnership of ARC acquires appreciated (or depreciated) properties by way of capital contributions from its partners, allocations would need to be made in a manner consistent with these requirements. Where a partner contributes cash to a partnership at a time that the partnership holds appreciated (or depreciated) property, the Treasury regulations provide for a similar allocation of these items to the other (i.e. non-contributing) partners. These rules may apply to the contribution by ARC to any subsidiary partnerships of the cash proceeds received in offerings of its stock. As a result, partners, including ARC, in subsidiary partnerships, could be allocated greater or lesser amounts of depreciation and taxable income in respect of a partnership's properties than would be the case if all of the partnership's assets (including any contributed assets) had a tax basis equal to their fair market values at the time of any contributions to that partnership. This could cause ARC to recognize, over a period of time, taxable income in excess of cash flow from the partnership, which might adversely affect ARC's ability to comply with the REIT distribution requirements discussed above.

Taxation of Stockholders

        This section summarizes the taxation of U.S. stockholders that are not tax-exempt organizations. For these purposes, a U.S. stockholder is a beneficial owner of common stock that for federal income tax purposes is:

        If an entity or arrangement treated as a partnership for U.S. federal income tax purposes holds ARC stock, the U.S. federal income tax treatment of a partner generally will depend upon the status of the partner and the activities of the partnership. A partner of a partnership holding ARC stock should consult its tax adviser regarding the U.S. federal income tax consequences to the partner of the acquisition, ownership and disposition of ARC stock by the partnership.

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        Distributions.    Provided that ARC qualifies as a REIT, distributions made to its taxable U.S. stockholders out of current or accumulated earnings and profits, and not designated as capital gain dividends, will generally be taken into account by them as ordinary income but will not be eligible for the dividends received deduction for corporations. In determining the extent to which a distribution with respect to our common stock constitutes a dividend for federal income tax purposes, our earnings and profits will be allocated, on a pro-rata basis, first to distributions with respect to our preferred stock, and then to our common stock. Dividends received from REITs are generally not eligible to be taxed at the preferential qualified dividend income rates applicable to individual U.S. stockholders who receive dividends from taxable subchapter C corporations pursuant to the 2003 Act. An exception applies, however, and individual U.S. stockholders are taxed at such rates on dividends designated by and received from REITs, to the extent that the dividends are attributable to (i) "REIT taxable income" that the REIT previously retained in the prior year, and on which it was subject to corporate level tax, (ii) dividends received by the REIT from taxable domestic subchapter C corporations, and certain foreign corporations or (iii) income from sales of appreciated property acquired from subchapter C corporations in carryover basis transactions that has been subject to tax.

        In addition, distributions from ARC that are designated as capital gain dividends will be taxed to U.S. stockholders as long-term capital gains, to the extent that they do not exceed the actual net capital gain of ARC for the taxable year, without regard to the period for which the U.S. stockholder has held its stock. A similar treatment will apply to long-term capital gains retained by ARC, to the extent that ARC elects the application of provisions of the Internal Revenue Code that treat U.S. stockholders of a REIT as having received, for federal income tax purposes, undistributed capital gains of the REIT, while passing through to U.S. stockholders a corresponding credit for taxes paid by the REIT on such retained capital gains, and increasing such U.S. stockholder's adjusted tax basis in their ARC stock by the difference between the amount of their capital gain and their share of the tax paid by ARC. See "Taxation of ARC—Annual Distribution Requirements." Corporate U.S. stockholders may be required to treat up to 20% of some capital gain dividends as ordinary income. Long-term capital gains are generally taxable at maximum federal rates of 15% (through 2008) in the case of U.S. stockholders who are individuals, and 35% for corporations. Capital gains attributable to the sale of depreciable real property held for more than 12 months are subject to a 25% maximum federal income tax rate for individual U.S. stockholders who are individuals, to the extent of previously claimed depreciation deductions.

        Distributions in excess of current and accumulated earnings and profits will not be taxable to a U.S. stockholder to the extent that they do not exceed the adjusted tax basis of the U.S. stockholder's shares in respect of which the distributions were made, but rather, will reduce the adjusted tax basis of these shares. To the extent that such distributions exceed the adjusted tax basis of an individual U.S. stockholder's shares, they will be included in income as long-term capital gain, or short-term capital gain if the shares have been held for one year or less. In addition, any dividend declared by ARC in October, November or December of any year and payable to a U.S. stockholder of record on a specified date in any such month will be treated as both paid by ARC and received by the U.S. stockholder on December 31 of such year, provided that the dividend is actually paid by ARC before the end of January of the following calendar year.

        Where a REIT holds a "residual interest" in a REMIC from which it derives "excess inclusion income," the REIT will be required to either distribute the excess inclusion income or pay tax on it (or a combination of the two) even though the income may not be received in cash by the REIT.

        To the extent that distributed excess inclusion income is allocable to a particular stockholder, the income (i) would not be allowed to be offset by any net operating losses otherwise available to the stockholder, (ii) would be subject to tax as unrelated business taxable income in the hands of most types of stockholders that are otherwise generally exempt from federal income tax, and (iii) would result in the application of U.S. federal income tax withholding at the maximum rate (30%), without

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reduction for any otherwise applicable income tax treaty, to the extent allocable to most types of non-U.S. stockholders.

        To the extent that a REIT has available net operating losses and capital losses carried forward from prior tax years, such losses may reduce the amount of distributions that must be made in order to comply with the REIT distribution requirements. See "—Taxation of ARC—Annual Distribution Requirements." Such losses, however, are not passed through to U.S. stockholders and do not offset income of U.S. stockholders from other sources, nor do they affect the character of any distributions that are actually made by a REIT, which are generally subject to tax in the hands of U.S. stockholders to the extent that the REIT has current or accumulated earnings and profits.

        Dispositions of ARC Stock.    In general, a U.S. stockholder will realize gain or loss upon the sale, redemption or other taxable disposition of ARC stock in an amount equal to the difference between the sum of the fair market value of any property and the amount of cash received in such disposition and the U.S. stockholder's adjusted tax basis in the stock at the time of the disposition. In general, a U.S. stockholder's tax basis will equal the U.S. stockholder's acquisition cost, increased by the excess of net capital gains deemed distributed to the U.S. stockholder (discussed above) less tax deemed paid on it and reduced by returns of capital. In general, capital gains recognized by individuals and other non-corporate U.S. stockholders upon the sale or disposition of shares of ARC stock will, pursuant to the 2003 Act, be subject to a maximum federal income tax rate of 15% for taxable years through 2008, if the ARC stock is held for more than 12 months, and will be taxed at ordinary income rates (of up to 35% through 2010) if the ARC stock is held for 12 months or less. Gains recognized by U.S. stockholders that are corporations are subject to federal income tax at a maximum rate of 35%, whether or not classified as long-term capital gains. Capital losses recognized by a U.S. stockholder upon the disposition of ARC stock held for more than one year at the time of disposition will be considered long-term capital losses, and are generally available only to offset capital gain income of the U.S. stockholder but not ordinary income (except in the case of individuals, who may offset up to $3,000 of ordinary income each year). In addition, any loss upon a sale or exchange of shares of ARC stock by a U.S. stockholder who has held the shares for six months or less, after applying holding period rules, will be treated as a long-term capital loss to the extent of distributions received from ARC that are required to be treated by the U.S. stockholder as long-term capital gain.

        If a U.S. stockholder recognizes a loss upon a subsequent disposition of ARC stock in an amount that exceeds a prescribed threshold, it is possible that the provisions of recently adopted Treasury regulations involving "reportable transactions" could apply, with a resulting requirement to separately disclose the loss generating transaction to the IRS. While these regulations are directed towards "tax shelters," they are written quite broadly, and apply to transactions that would not typically be considered tax shelters. In addition, the 2004 Act imposes significant penalties for failure to comply with these requirements. You should consult your tax advisers concerning any possible disclosure obligation with respect to the receipt or disposition of ARC stock, or transactions that might be undertaken directly or indirectly by ARC. Moreover, you should be aware that ARC and other participants in transactions involving ARC (including their advisors) might be subject to disclosure or other requirements pursuant to these regulations.

        Distributions made by ARC and gain arising from the sale or exchange by a U.S. stockholder of ARC stock will not be treated as passive activity income. As a result, U.S. stockholders will not be able to apply any "passive losses" against income or gain relating to ARC stock. Distributions made by ARC, to the extent they do not constitute a return of capital, generally will be treated as investment income for purposes of computing the investment interest limitation.

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        The following is a summary of certain U.S. federal income and estate tax consequences of the acquisition, ownership and disposition of ARC stock applicable to non-U.S. stockholders of ARC stock. For purposes of this summary, a non-U.S. stockholder is a beneficial owner of ARC stock that is not a U.S. stockholder. The discussion is based on current law and is for general information only. It addresses only selective and not all aspects of U.S. federal income and estate taxation.

        Ordinary Dividends.    The portion of dividends received by non-U.S. stockholders payable out of the earnings and profits of ARC which are not attributable to gains from sales or exchanges of U.S. real property interests and which are not effectively connected with a U.S. trade or business of the non-U.S. holder will generally be subject to U.S. federal withholding tax at the rate of 30%, unless reduced or eliminated by treaty.

        In general, non-U.S. holders will not be considered to be engaged in a U.S. trade or business solely as a result of their ownership of ARC stock. In cases where the dividend income from a non-U.S. holder's investment in ARC stock is, or is treated as, effectively connected with the non-U.S. holder's conduct of a U.S. trade or business, the non-U.S. holder generally will be subject to U.S. federal income tax at graduated rates, in the same manner as U.S. stockholders are taxed with respect to such dividends, such income must generally be reported on a U.S. income tax return filed by or on behalf of the non-U.S. holder, and the income may also be subject to the 30% branch profits tax in the case of a non-U.S. stockholder that is a corporation.

        Non-Dividend Distributions.    Unless ARC stock constitutes a U.S. real property interest, or USRPI, distributions by ARC which are not dividends out of the earnings and profits of ARC will not be subject to U.S. federal income tax. If it cannot be determined at the time at which a distribution is made whether or not the distribution will exceed current and accumulated earnings and profits, the distribution will be subject to withholding at the rate applicable to dividends. However, the non-U.S. stockholder may seek a refund from the IRS of any amounts withheld if it is subsequently determined that the distribution was, in fact, in excess of ARC's current and accumulated earnings and profits. If ARC stock constitutes a USRPI, as described below, distributions by ARC in excess of the sum of its earnings and profits plus the stockholder's basis in its ARC stock will be taxed under the Foreign Investment in Real Property Tax Act of 1980, or FIRPTA, at the rate of tax, including any applicable capital gains rates, that would apply to a U.S. stockholder of the same type (e.g., an individual or a corporation, as the case may be), and the collection of the tax will be enforced by a refundable withholding at a rate of 10% of the amount by which the distribution exceeds the stockholder's share of ARC's earnings and profits.

        Capital Gain Dividends.    Under FIRPTA, a distribution made by ARC to a non-U.S. stockholder, to the extent attributable to gains from dispositions of USRPIs held by ARC directly or through pass-through subsidiaries ("USRPI capital gains"), will, except as described below, be considered effectively connected with a U.S. trade or business of the non-U.S. holder and will be subject to U.S. federal income tax at the rates applicable to U.S. stockholders, without regard to whether the distribution is designated as a capital gain dividend. See above under "—Taxation of Non-U.S. Stockholders—Ordinary Dividends," for a discussion of the consequences of income that is effectively connected with a U.S. trade or business. In addition, in such cases ARC will be required to withhold tax equal to 35% of the amount of dividends to the extent the dividends constitute USRPI capital gains. Distributions subject to FIRPTA may also be subject to a 30% branch profits tax in the hands of a non-U.S. holder that is a corporation. A distribution is not a USRPI capital gain if ARC held the underlying asset solely as a creditor, although the holding of a shared appreciation mortgage loan would not be solely as a creditor. Capital gain dividends received by a non-U.S. holder from a REIT that are attributable to dispositions by that REIT of assets other than USRPIs are generally not subject to U.S. federal income or withholding tax.

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        Pursuant to the 2004 Act, a capital gain dividend by ARC that would otherwise have been treated as a USRPI capital gain will not be so treated or be subject to FIRPTA, will generally not be treated as income that is effectively connected with a U.S. trade or business, and will instead be treated the same as an ordinary dividend from ARC (see "—Taxation of Non-U.S. Stockholders—Ordinary Dividends"), provided that (1) the capital gain dividend is received with respect to a class of stock that is regularly traded on an established securities market located in the United States, and (2) the recipient non-U.S. holder does not own more than 5% of that class of stock at any time during the taxable year in which the capital gain dividend is received. This provision of the 2004 Act is effective for tax years beginning after December 31, 2004.

        Dispositions of ARC Stock.    Unless ARC stock constitutes a USRPI, a sale of the stock by a non-U.S. holder generally will not be subject to U.S. federal income taxation under FIRPTA. The stock will not be treated as a USRPI if less than 50% of ARC's assets throughout a prescribed testing period consist of interests in real property located within the United States, excluding, for this purpose, interests in real property solely in a capacity as a creditor.

        Even if the foregoing test is not met, ARC stock nonetheless will not constitute a USRPI if ARC is a "domestically controlled REIT." A domestically controlled REIT is a REIT in which, at all times during a specified testing period, less than 50% in value of its outstanding shares is held directly or indirectly by non-U.S. stockholders. ARC believes that it is, and it expects to continue to be, a domestically controlled REIT and, therefore, the sale of ARC stock should not be subject to taxation under FIRPTA. Because ARC stock is transferable, however, no assurance can be given that ARC will be a domestically controlled REIT.

        In the event that ARC does not constitute a domestically controlled REIT, a non-U.S. holder's sale of stock nonetheless will generally not be subject to tax under FIRPTA as a sale of a USRPI, provided that (a) the stock owned is of a class that is "regularly traded," as defined by applicable Treasury regulations, on an established securities market, and (b) the selling non-U.S. holder owned, actually or constructively, 5% or less of ARC's outstanding stock of that class at all times during a specified testing period.

        If gain on the sale of stock of ARC were subject to taxation under FIRPTA, the non-U.S. holder would be subject to the same treatment as a U.S. stockholder with respect to such gain, subject to applicable alternative minimum tax and a special alternative minimum tax in the case of non-resident alien individuals, and the purchaser of the stock could be required to withhold 10% of the purchase price and remit such amount to the IRS.

        Gain from the sale of ARC stock that would not otherwise be subject to FIRPTA will nonetheless be taxable in the United States to a non-U.S. holder in two cases: (a) if the non-U.S. holder's investment in the ARC stock is effectively connected with a U.S. trade or business conducted by such non-U.S. holder, the non-U.S. holder will be subject to the same treatment as a U.S. stockholder with respect to such gain, or (b) if the non-U.S. holder is a nonresident alien individual who was present in the United States for 183 days or more during the taxable year and has a "tax home" in the United States, the nonresident alien individual will be subject to a 30% tax on the individual's capital gain.

        Estate Tax.    ARC stock owned or treated as owned by an individual who is not a citizen or resident (as specially defined for U.S. federal estate tax purposes) of the United States at the time of death will be includable in the individual's gross estate for U.S. federal estate tax purposes, unless an applicable estate tax treaty provides otherwise, and may therefore be subject to U.S. federal estate tax.

        ARC will report to its U.S. stockholders and the IRS the amount of dividends paid during each calendar year and the amount of any tax withheld. Under the backup withholding rules, a U.S.

35


stockholder may be subject to backup withholding with respect to dividends paid unless the holder is a corporation or comes within other exempt categories and, when required, demonstrates this fact, or provides a taxpayer identification number or social security number, certifies as to no loss of exemption from backup withholding and otherwise complies with applicable requirements of the backup withholding rules. A U.S. stockholder that does not provide his or her correct taxpayer identification number or social security number may also be subject to penalties imposed by the IRS. Backup withholding is not an additional tax. Any amount paid as backup withholding will be creditable against the U.S. stockholder's income tax liability. In addition, ARC may be required to withhold a portion of capital gain distribution to any U.S. stockholder who fails to certify their non-U.S. status. Non-U.S. stockholders may be required to comply with applicable certification procedures to establish that they are not U.S. stockholders in order to avoid the application of such information reporting requirements and backup withholding.

        Tax-exempt entities, including qualified employee pension and profit sharing trusts and individual retirement accounts, generally are exempt from federal income taxation. However, they are subject to taxation on their unrelated business taxable income, which we refer to in this prospectus as UBTI. While many investments in real estate may generate UBTI, the IRS has ruled that dividend distributions from a REIT to a tax-exempt entity do not constitute UBTI. Based on that ruling, and provided that (1) a tax-exempt stockholder has not held its ARC stock as "debt financed property" within the meaning of the Internal Revenue Code (i.e., where the acquisition or holding of the property is financed through a borrowing by the tax-exempt stockholder), and (2) the ARC stock is not otherwise used in an unrelated trade or business, distributions from ARC and income from the sale of the ARC stock generally should not give rise to UBTI to a tax-exempt stockholder.

        Tax-exempt stockholders that are social clubs, voluntary employee benefit associations, supplemental unemployment benefit trusts, and qualified group legal services plans exempt from federal income taxation under sections 501(c)(7), (c)(9), (c)(17) and (c)(20) of the Internal Revenue Code, respectively, are subject to different UBTI rules, which generally will require them to characterize distributions from ARC as UBTI.

        In certain circumstances, a pension trust (i) that is described in Section 401(a) of the Internal Revenue Code, (ii) is tax exempt under section 501(a) of the Internal Revenue Code, and (iii) that owns more than 10% of ARC's stock could be required to treat a percentage of the dividends from ARC as UBTI, if ARC is a "pension-held REIT." ARC will not be a pension-held REIT unless either (A) one pension trust owns more than 25% of the value of ARC's stock, or (B) a group of pension trusts, each individually holding more than 10% of the value of ARC's stock, collectively owns more than 50% of such stock. Certain restrictions on ownership and transfer of ARC's stock should generally prevent a tax-exempt entity from owning more than 10% of the value of ARC's stock, or ARC from becoming a pension-held REIT.

        Tax-exempt stockholders are urged to consult their tax advisors regarding the federal, state, local and foreign tax consequences of owning ARC stock.

Other Tax Considerations

        The rules dealing with federal income taxation are constantly under review by persons involved in the legislative process and by the IRS and the Treasury Department. No assurance can be given as to whether, or in what form, the legislative proposals described below (or any other proposals affecting REITs or their stockholders) will be enacted. Changes to the federal tax laws and interpretations of federal tax laws could adversely affect an investment in ARC.

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        The 2003 Act reduced the rates at which individual U.S. stockholders are taxed on capital gains (a maximum rate of 15% replaces the prior maximum rate of 20%, through 2008), and gains from the stock of REITs are eligible for the reduced rates. Tax rates for individuals on dividends received from taxable subchapter C corporations were also reduced (with the maximum rate falling to 15% for tax years through 2008), although dividends received from REITs would generally continue to be taxed at regular ordinary income rates (now at a maximum of 35% through 2010). See "—Taxation of Stockholders—Taxation of Taxable U.S. Stockholders—Distributions." This change in the tax treatment of dividends could cause stockholders to perceive investments in REITs to be comparatively less attractive than investments in other corporations, which could adversely affect the value of the stock of REITs, including ARC.

        The 2004 Act contains a number of provisions that affect the tax treatment of REITs and their stockholders. As discussed above, the 2004 Act includes provisions that generally ease compliance with certain REIT asset requirements, with the REIT 95% gross income requirement (in connection with income from hedging activities), and which grant relief in cases involving violations of the REIT asset and other requirements, provided that specified conditions are met. See "Taxation of ARC—Requirements for Qualification—General," "—Asset Tests" and "—Income Tests." The 2004 Act also alters the tax treatment of capital gain dividends received by non-U.S. stockholders in some cases. See "Taxation of Stockholders—Taxation of Non-U.S. Stockholders—Capital Gain Dividends." These changes are generally effective beginning in 2005, except that the provisions relating to the 10% asset (value) requirement have retroactive effect to 2001.

        ARC and its subsidiaries and stockholders may be subject to state, local or foreign taxation in various jurisdictions, including those in which it or they transact business, own property or reside. ARC owns interests in properties located in a number of jurisdictions, and may be required to file tax returns in certain of those jurisdictions. The state, local or foreign tax treatment of ARC and its stockholders may not conform to the federal income tax treatment discussed above. Any foreign taxes incurred by ARC would not pass through to stockholders as a credit against their U.S. federal income tax liability. Prospective investors should consult their tax advisors regarding the application and effect of state, local and foreign income and other tax laws on an investment in common stock of ARC.

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SELLING STOCKHOLDERS

        This prospectus relates to the offer and sale from time to time by the selling stockholders listed below and their pledgees, donees and other successors in interest (collectively, the "selling stockholders") of up to 2,387,981 shares of common stock that may be issued from time to time by us in exchange for partnership common units of our operating partnership. The following table sets forth certain information with respect to the selling stockholders and their beneficial ownership of shares of common stock as of the date of this prospectus. Except as indicated below, none of the selling stockholders holds any position, office or has had any other material relationship with us, or any of our predecessors or affiliates, during the past three years. Except as indicated below, the shares beneficially owned by each of the selling stockholders listed below represent less than 1% of the shares of our common stock outstanding as of March 29, 2005. Because the selling stockholders may sell some or all of the shares offered hereby, and because there are currently no agreements, arrangements or understandings with respect to the sale of any of such shares, no estimate can be given as to the number of shares that will be held by any of the selling stockholders upon termination of any offering made hereby. In addition, the selling stockholders named below may have sold, transferred or otherwise disposed of all or any portion of their common stock since the date on which they provided the information regarding their holdings, in transactions exempt from the registration requirements of the Securities Act. See "Plan of Distribution."

Name of Selling Stockholder

  Common Stock Beneficially Owned
Prior to Offering(1)

  Common Stock
Offered Hereby(2)

511 Equities Corporation   0   19,683
Michael Ainslie   0   35,812
Henry C. Barkhorn III   0   9,809
J. Russell Bellamy   0   9,576
Judith Berkowitz   0   15,721
Peter L. Briger, Jr.   0   11,094
Brittany Ridge Investment Partners, L.P.   0   8,025
Robert Cenci   0   27,669
Henry Christensen III   0   23,451
Susan Friedman Cohen   0   34,902
Jon S. Corzine   38,167   19,809
Robert H. Craft Jr.   0   2,619
Donald R. Crawshaw   0   7,454
Charles A. Davis   0   20,941
Robert N. Downey   0   47,882
John G. Duffy   0   42,335
Estate of Edward Dunay   0   17,435
Lewis M. Eisenberg   0   19,809
Farmer Family Trust   0   27,737
FAWPEAS L.P.   0   31,140
David Benioff Friedman   0   34,902
Donald R. Gant   0   65,821
GGCP, Inc.   0   19,809
Sally Gordon   0   11,162
Granite Capital, L.P.   0   95,766
J. Markham Green(3)   93,248   34,871
James M. Harasimowicz   0   3,717
Walter F. Harrison, III   0   7,923
Richard W. & Catherine F. Herbst   0   14,999
         

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James E. Hunt   6,807   13,193
Fern K. Hurst   0   1,242
Robert J. Hurst   0   13,605
Indian Creek Partners, L.P.   0   37,061
Indosuez ARC Partners, L.P.   0   63,807
William Ingram   0   6,670
William H. Ingram and Cathy M. Brienza   0   4,744
Mary Kong   0   4,647
Caroline Levy   0   34,902
Steven B. Malkenson   1,000   17,028
William B. Malkenson   0   5,942
McMahon Investment Partners, L.P.   0   171,387
Thomas Mendell   0   5,298
Eugene Mercy Jr.(4)   192,840   128,059
Mercy Foundation, Inc.(4)   2,047   26,202
Sue B. Mercy   10,000   23,182
Robert E. Mnuchin(5)   499,000   27,737
Michael J. Moss   0   4,647
Arno P. Niemand   0   4,920
Dean R. O'Hare   0   4,871
Park Partners II   72,285   37,516
Andrew and Elaine Pesky   0   15,754
Gregory Stephen Pesky   0   2,619
Joel and Helen Portugal   0   3,827
Richard T. Pratt   0   3,247
Bruce V. Rauner   0   68,252
Richard Reiss, Jr. and Bonnie Reiss Jr.   49,700   30,290
Thomas Rhodes   0   6,888
Joseph P. and Beatrice L. Riccardo   0   11,094
Robert S. Risoleo   0   4,787
David N. Roberts   0   4,871
Deborah Roberts   0   2,102
Gary D. Rose and Karen A. Rose, Trustees
    Trusts for the benefit of Adam James Rose and
    Alexander Mark Rose
  0   9,841
Marvin Schwartz   0   11,162
Howard A. Silverstein   0   15,898
Daniel J. Sullivan Jr.   0   6,888
Dennis and Cynthia Suskind   0   9,294
Tanavon Corporation   0   149,769
Grantor Trust for Dana E. Tang   0   3,153
Grantor Trust for Kevin C. Tang   0   3,153
Grantor Trust for Kristin A. Tang   0   3,153
Grantor Trust for Tracy L. Tang   0   3,153
Oscar L. Tang   0   12,087
Robert M. Thomas Jr.   0   2,619
Laura T. Traphagen   0   29,956
Ross E. Traphagen Jr.   0   162,917
         

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Lawrence E. and Valerie Casey Uhl   0   3,248
Thomas I. Unterberg   0   39,618
Watchung Road Associates, L.P.(6)   750,254   274,746
Kendrick R. Wilson III   0   11,094
Heidi Pesky Worcester   0   2,619
Victor Wright   0   19,809
Robert Yedid   0   3,654
Todd J. Zelek   0   10,787
Todd and Gretchen Zelek   0   8,057
Nicolas D. Zerbib   0   525
       
Total     2.387,981

(1)
Does not include shares of common stock that may be issued by us from time to time in exchange for an equal number of OP units held by the selling stockholders, as reflected in column two.

(2)
Represents the number of shares of common stock that may be issued by us from time to time in exchange for an equal number of OP units held by the selling stockholder.

(3)
J. Markham Green currently serves on the Board of Directors of ARC.

(4)
Eugene Mercy Jr., President of Mercy Foundation, Inc., currently serves on the Board of Directors of ARC. Does not include shares that may be issued in exchange for an equal number of OP units held by his wife, Sue B. Mercy, as reflected separately in the table above.

(5)
Shares beneficially owned together with shares that may be issued by us in exchange for an equal number of OP units beneficially owned represent approximately 1.29% of our outstanding common stock as of March 29, 2005.

(6)
Shares beneficially owned together with shares that may be issued by us in exchange for an equal number of OP units beneficially owned represent approximately 2.49% of our outstanding common stock as of March 29, 2005.

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PLAN OF DISTRIBUTION

        We are required to use all reasonable efforts to keep the registration statement of which this prospectus forms a part effective until all of the selling stockholders' shares of common stock registered herein have been distributed as contemplated herein, but in any event not later than the third anniversary of the date the registration statement is first declared effective by the SEC.

        We have the right in our sole discretion, based on any valid business purpose, to delay the filing or amendment of such registration statement prior to its effectiveness or, if effective, to suspend the use of this prospectus comprising a part of such registration statement for a reasonable length of time and from time to time provided that the aggregate number of days in all such delay periods occurring in any period of twelve consecutive months shall not exceed 105 days.

        This prospectus relates to the offer and sale from time to time by the selling stockholders named herein of up to 2,387,981 shares of common stock. The selling stockholders may sell shares from time to time in one or more transactions, which may include sales in open market or block transactions on the New York Stock Exchange, or such other national securities exchange or automated interdealer quotation system on which shares of common stock are then listed or quoted, sales in the over-the-counter market, privately negotiated transactions, put or call options transactions relating to the shares, short sales of shares, hedging transactions, or in transactions in which shares may be delivered in connection with issuance of securities by issuers other than ARC that are exchangeable for or payable in such shares, distributions to beneficiaries, partners, members, or stockholders of the selling stockholders or a combination of such methods of sale or by any other legally available means, at market prices prevailing at the time of sale, at prices related to prevailing market prices at the time of the sale or at negotiated prices. Such transactions may or may not involve brokers or dealers. None of the selling stockholders have advised us that they have entered into any agreements, understandings or arrangements with any underwriters or broker-dealers regarding the sale of the securities offered hereby, nor is there an underwriter or coordinating broker acting in connection with the proposed sale of shares by the selling stockholders. In addition, any of the shares covered by this prospectus that qualify for sale pursuant to Rule 144 under the Securities Act of 1933 (the "Securities Act"), may be sold under Rule 144 rather than pursuant to this prospectus.

        The selling stockholders may effect such transactions by selling shares directly to purchasers or to or through broker-dealers, which may act as agents or principals. Such broker-dealers may receive compensation in the form of discounts, concessions or commissions from the selling stockholders or the purchasers of shares for whom such broker-dealers may act as agents or to whom they sell as principal, or both (which compensation as to a particular broker-dealer might be in excess of customary commissions). In effecting sales, such broker-dealers may arrange for other broker-dealers to participate.

        The selling stockholders may enter into options or other transactions with broker-dealers or other financial institutions who may resell the securities offered hereby pursuant to this prospectus (as may be supplemented or amended to reflect the transaction).

        The selling stockholders will be subject to the prospectus delivery requirements of the Securities Act, which may include delivery through the facilities of the New York Stock Exchange pursuant to Rule 153 under the Securities Act. The anti-manipulation provisions of Regulation M promulgated under the Securities Exchange Act of 1934 also may apply to sales by the selling stockholders in the market.

        To the extent necessary to comply with the securities laws of certain jurisdictions, the securities offered hereby will be offered or sold in such jurisdictions only through registered or licensed brokers or dealers. In addition, in certain jurisdictions the securities offered hereby may not be offered or sold

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unless they have been registered or qualified for sale in such jurisdictions or an exemption or federal preemption from registration or qualification is available and is complied with.

        We have agreed to pay all expenses in connection with the registration of the shares being offered hereby. Selling stockholders are responsible for paying broker's commissions and any other selling expenses.

        We or the selling stockholders may agree to indemnify any agent, dealer or broker-dealer that participates in transactions involving sales of the shares against certain liabilities, including liabilities arising under the Securities Act.

        Upon our being notified by a selling stockholder that any material arrangement has been entered into with an underwriter or a broker-dealer for the sale of shares through a special offering, block trade, exchange distribution or a secondary distribution or a purchase by a broker or dealer, a supplement to this prospectus will be filed, if required, pursuant to Rule 424(b) under the Securities Act, disclosing (i) the name of each such selling stockholder and of the participating broker-dealer(s), (ii) the number of shares involved, (iii) the price at which such shares were sold, (iv) the commissions paid or discounts or concessions allowed to such broker-dealer(s), where applicable, (v) that such broker-dealer(s) did not conduct any investigation to verify the information set out or incorporated by reference in this prospectus and (vi) other facts material to the transaction.

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LEGAL MATTERS

        The validity of the securities offered hereby will be passed upon for us by Venable LLP, Baltimore, Maryland. Certain tax matters will be passed upon for us by Skadden, Arps, Slate, Meagher & Flom LLP, New York, New York.


EXPERTS

        The financial statements and financial statement schedule incorporated in this prospectus by reference to the Annual Report on Form 10-K for the year ended December 31, 2004 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

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WHERE YOU CAN FIND MORE INFORMATION

        We are currently subject to the information and reporting requirements of the Exchange Act, and in accordance therewith file annual, quarterly and special reports, proxy statements and other information with the Securities and Exchange Commission, or SEC. Those reports and other information so filed with the SEC may be inspected and copied, at the prescribed rates, at the public reference facilities maintained by the SEC at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549. Information on the operation of the Public Reference Room is available by calling the Commission at 1-800-SEC-0330. The SEC also maintains a site on the World Wide Web at http://www.sec.gov, which contains reports and other information regarding registrants. You can also inspect reports, proxy statements and other information pertaining to us at the offices of the NYSE at 20 Broad Street, New York, New York 10005.

        We filed a registration statement on Form S-3 to register with the SEC the securities offered by this prospectus. This prospectus is a part of that registration statement. As allowed by the rules of the SEC, this prospectus does not contain all of the information you can find in our registration statement or the exhibits to the registration statement.

        You should rely only on the information or representations provided in this prospectus or any prospectus supplement. We have not authorized anyone else to provide you with different information. Our selling stockholders may not make an offer of our securities in any state where the offer is not permitted. The delivery of this prospectus does not, under any circumstances, mean that there has not been a change in our affairs since the date of this prospectus. It also does not mean that the information in this prospectus is correct after this date.


INCORPORATION OF DOCUMENTS BY REFERENCE

        We incorporate by reference into this prospectus information we file with the SEC, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is deemed to be part of this prospectus, and later information that we file with the SEC will automatically update and supercede that information. This prospectus incorporates by reference the documents set forth below, that we have previously filed with the SEC. These documents contain important information about us and our financial condition.


        All documents filed by us under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act on or after the date of this prospectus and prior to the date of the completion of the offering of the securities described in this prospectus shall also be deemed to be incorporated by reference in this prospectus and to be a part of this prospectus from the date of filing of those documents. Any statement contained in this prospectus or in a previously filed document incorporated or deemed to be incorporated by reference in this prospectus shall be deemed to be modified or superceded for purposes of this prospectus to the extent that a statement contained in this prospectus or in any other subsequently filed document that also is or was deemed to be incorporated by reference in this prospectus modifies or supercedes that statement. Any statement so modified or superceded shall not be deemed, except as so modified or superceded, to constitute a part of this prospectus.

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        The information relating to us contained in this prospectus should be read together with the information in the documents incorporated by reference.

        You can obtain any of the documents incorporated by reference in this document from us, or from the SEC through the SEC's Internet World Wide Web site at the address described above. Documents incorporated by reference are available from us without charge, excluding any exhibits to those documents, unless the exhibit is specifically incorporated by reference as an exhibit in this document. You can obtain documents incorporated by reference in this document, at no cost, by requesting them in writing or by telephone from us at the following address or telephone number:

Affordable Residential Communities Inc.
Attention: Corporate Secretary
600 Grant Street, Suite 900
Denver, Colorado 80203
(303) 291-0222.

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