EXHIBIT 21








State of IncorporationSubsidiary Name

or OrganizationArchstone-Smith Communities LLC

DelawarePTR-California Holdings (1) LLC

DelawarePTR-California Holdings (2) LLC

DelawarePTR-California Holdings (3) LLC

DelawareSCP Utah Holdings 1 LLC

DelawareSCP Utah Holdings 2 LLC

DelawareASN-SCP Utah Holdings 4 LLC

DelawareASN-SCP Utah Holdings 5 LLC

DelawarePTR-Colorado (1), LLC

ColoradoSecurity Capital Atlantic Multifamily LLC

DelawareSCA-North Carolina (1) LLC

DelawareSCA-North Carolina (2) LLC

DelawareSCA-Tennessee (3) LLC

DelawareSCA-Tennessee (4) LLC

DelawareAtlantic-Tennessee Limited Partnership

DelawareSCA Florida Holdings (2) LLC

DelawareSCA-I LLC

DelawareAtlantic Multifamily Limited

DelawarePartnership-I

DelawareSCA North Carolina Limited Partnership

DelawareASN Washington Holdings (1) LLC

DelawareASN RH Member LLC

DelawareASN San Diego LLC

DelawareASN Studio City LLC

DelawareASN Massachusetts Holdings (1) LLC

DelawareASN Massachusetts Holdings (2) LLC

DelawareASN Massachusetts Holdings (3) LLC

DelawareASN Massachusetts Holdings (4) LLC

DelawareASN Massachusetts Holdings (5) LLC

DelawareASN Minnesota Holdings (1) LLC

DelawareASN Multifamily Limited Partnership

DelawareTurtle Run at Coral Springs, L.L.C.

DelawareArchstone Communities Limited Partnership

DelawareArchstone Communities Limited Partnership II

DelawareASN Dakota Ridge L.L.C.

DelawareASN Pinnacle L.L.C.

DelawareASN Wendemere L.L.C.

DelawareArchstone Management Services Incorporated

DelawareArchstone Management Services (Florida) Incorporated

DelawareArchstone Vinnin Square LLC

DelawareASN Northgate, LLC

DelawareASN Stone Ends, LLC

DelawareASN Richardson Highlands LLC

DelawareASN Technologies, Inc.

DelawareASN Gresham Commons LLC

DelawareASN Sussex Commons LLC

DelawareASN Charles Daniels LLC

DelawareASN Saybrooke LLC

DelawareASN Cambridge LLC

DelawareASN Watertown LLC

DelawareASN Park Place LLC

DelawareASN Washington Boulevard LLC

DelawareASN West End Boulevard LLC

DelawareSAL Holdings LLC

DelawareFirst Multifamily Properties LLC

DelawareFMP GP LLC

Delaware




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EXHIBIT 21 (Continued)





State of IncorporationSubsidiary Name

or OrganizationFMP Limited Partnership

DelawareSecond Multifamily Properties LLC

DelawareSMP GP LLC

DelawareSMP Limited Partnership

DelawareMonadnock Property Trust, LLC

DelawareMonadnock Texas LP

TexasMP North Carolina GP Inc

DelawareMP North Carolina LP

DelawareMP Texas GP LLC

DelawareTexas GP Properties LLC

DelawareCasco Property Trust LLC

DelawareCasco GP LLC

DelawareCasco TN LP

DelawareCasco TN GP Inc.

DelawareCasco Properties LP

DelawareCasco Dunwoody LLC

DelawareKatahdin Property Trust LLC

DelawareKatahdin GP LLC

DelawareKatahdin Properties LP

DelawareArchstone Financial Services LLC

DelawareSafeRent LLC

DelawareArchstone Foundation (non-profit)

DelawareMonterey Ranch Residential & Commercial Community Property Owners Association (non-profit)

TexasNEC Tatum & Bell Owners Association

ArizonaCourthouse Hill L.L.C.

DelawareSmith Property Holdings Springfield L.L.C.

VirginiaSmith Property Holdings 2000 Commonwealth L.L.C.

DelawareSmith Property Holdings Crystal Plaza L.L.C.

DelawareSmith Property Holdings Dearborn Place Manager L.L.C.

DelawareSmith Property Holdings One East Delaware L.L.C.

DelawareSmith Property Holdings Lincoln Towers L.L.C.

VirginiaSmith Property Holdings One L.P.

DelawareSmith Property Holdings One (D.C.) L.P.

DelawareSmith Property Holdings Crystal Towers L.P.

DelawareSmith Property Holdings Two L.P.

DelawareSmith Property Holdings Two (D.C.) L.P.

DelawareSmith Property Holdings Three L.P.

DelawareSmith Property Holdings Three (D.C.) L.P.

DelawareSmith Property Holdings Four L.P.

DelawareSmith Property Holdings Kenmore L.P.

DelawareSmith Property Holdings Five L.P.

DelawareSmith Property Holdings Five (D.C.) L.P.

DelawareFirst Herndon Associates L.P.

DelawareSmith Property Holdings Six L.P.

DelawareSmith Property Holdings Six (D.C.) L.P.

DelawareSmith Property Holdings Van Ness L.P.

DelawareSmith Property Holdings Columbia Road, L.P.

DelawareSmith Property Holdings Seven L.P.

DelawareSmith Property Holdings Cronins Landing L.P.

MassachusettsSmith Property Holdings 4411 Connecticut Avenue L.L.C.

DelawareSmith Property Holdings Buchanan House L.L.C.

DelawareSmith Property Holdings McClurg Court L.L.C.

DelawareSmith Property Holdings Parc Vista L.L.C.

DelawareSmith Property Holdings Stonebridge L.L.C.

DelawareSPH University Center L.L.C.

Delaware




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EXHIBIT 21 (Continued)





State of IncorporationSubsidiary Name

or OrganizationSmith Property Holdings Superior Place L.L.C.

DelawareSmith Property Holdings Water Park Towers L.L.C.

DelawareSmith Property Holdings Renaissance Manager L.L.C.

DelawareSPH Renaissance, L.L.C.

DelawareAlban Towers L.L.C.

DelawareSmith Property Holdings Alban Towers L.L.C.

DelawareSmith Property Holdings Alban Towers Two L.L.C.

DelawareSmith Property Holdings Aventura A L.L.C.

DelawareSmith Property Holdings Aventura B L.L.C.

DelawareSmith Property Holdings Aventura C L.L.C.

DelawareSmith Property Holdings Consulate L.L.C.

DelawareSmith Property Holdings Countryside L.L.C.

DelawareSmith Property Holdings Crystal Houses L.L.C.

DelawareSmith Property Holdings Park West L.L.C.

DelawareSmith Property Holdings Skyline Towers, L.L.C.

DelawareSmith Property Holdings Somerset L.L.C.

DelawareSmith Property Holdings South Beach Towers L.L.C.

DelawareSmith Property Holdings Sunset Pointe Court L.L.C.

DelawareSmith Property Holdings Sunset Pointe III L.L.C.

DelawareSmith Property Holdings Sunset Pointe North L.L.C.

DelawareSmith Property Holdings Sunset Pointe South L.L.C.

DelawareSmith Property Holdings Sunset Pointe West L.L.C.

DelawareSmith Property Holdings Terrace L.L.C.

DelawareSmith Property Holdings Delaware Place, L.P.

DelawareSmith Property Holdings Plaza 440 Manager L.L.C.

DelawareSmith Property Holdings Concord L.L.C.

DelawareSmith Property Holdings Harbour House L.L.C.

DelawareSmith Property Holdings Illinois Center L.L.C.

DelawareSmith Property Holdings New River L.L.C.

DelawareSmith Property Holdings Reston Landing L.L.C.

DelawareSmith Property Holdings Sagamore Towers, L.L.C.

DelawareSmith Property Holdings Skyline Mall, L.L.C.

VirginiaSmith Property HoldingsSpringfield L.L.C.

VirginiaSPH Springfield Station L.L.C.

DelawareSmith Property Holdings Wilson L.L.C.

DelawareMetropolitan Acquisition Finance L.P.

DelawareSmith Employment Services L.P.

DelawareCharles E. Smith Insurance Agency, Inc.

Washington, D.C.Pollard Gardens I, L.L.C.

VirginiaMiami Beach Properties L.L.C.

DelawareSmith Realty Company

MarylandASN SMCI LLC

DelawareSmith Management Construction, Inc.

MarylandAMERITON Holdings, LLC

DelawareAMERITON Properties Incorporated

MarylandConsolidated Engineering Services, Inc.

Maryland