##### 



EXHIBIT 21 Subsidiary Name
    
    OrganizationAICP LLC
    
    DelawareAMERITON Properties Incorporated
    
    MarylandAPI Barrington Hills, LLC
    
    DelawareAPI Cameron Park LLC
    
    DelawareAPI Dadeland LLC
    
    DelawareAPI Genesis Park LLC
    
    DelawareAPI Hibiscus LLC
    
    DelawareAPI Lakemont LLC
    
    DelawareAPI Laurel Crossing LLC
    
    DelawareAPI Mission North LLC
    
    DelawareAPI Multifamily Properties LLC
    
    DelawareAPI Roosevelt Center Incorporated
    
    DelawareAPI Sonoma Incorporated
    
    DelawareAPI Stratford LLC
    
    DelawareArchstone Foundation
    
    DelawareArchstone Property Management LLC
    
    DelawareArchstone Property Management (California) LLC
    
    DelawareArchstone Vinnin Square LLC
    
    DelawareArchstone-Smith Communities LLC
    
    DelawareArchstone-Smith Unitholder Services LLC
    
    DelawareASN Bowie LLC
    
    DelawareASN Calabasas I LLC
    
    DelawareASN Calabasas II LLC
    
    DelawareASN Cambridge LLC
    
    DelawareASN City Place LLC
    
    DelawareASN Cypress Cove LLC
    
    FloridaASN Dakota Ridge LLC
    
    DelawareASN Doral West LLC
    
    FloridaASN Dupont Circle LLC
    
    DelawareASN Estancia LLC
    
    DelawareASN Fairfax Corner LLC
    
    DelawareASN Gresham Commons LLC
    
    DelawareASN Hoboken I LLC
    
    DelawareASN Hoboken II LLC
    
    DelawareASN Lakeshore East LLC
    
    DelawareASN Las Flores LLC
    
    DelawareASN Maple Leaf Member LLC
    
    DelawareASN Maple Leaf (Office) LLC
    
    DelawareASN Marina Del Rey LLC
    
    DelawareASN Meadow Wood LLC
    
    DelawareASN Miramar Lakes LLC
    
    DelawareASN Multifamily Limited Partnership
    
    DelawareASN Newport Crossing LLC
    
    DelawareASN Northgate LLC
    
    DelawareASN Oak Creek LLC
    
    DelawareASN Palm Trace Landings LLC
    
    FloridaASN Park Essex LLC
    
    DelawareASN Pinnacle LLC
    
    Delaware




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##### 



Subsidiary Name
    
    OrganizationASN Presidio View LLC
    
    DelawareASN Reading LLC
    
    DelawareASN RH Member LLC
    
    DelawareASN Richardson Highlands LLC
    
    DelawareASN Rockville LLC
    
    DelawareASN Rolling Hills Manager LLC
    
    DelawareASN Roosevelt Center LLC
    
    DelawareASN San Diego LLC
    
    DelawareASN Santa Monica LLC
    
    DelawareASN Saybrooke LLC
    
    DelawareASN Sonoma LLC
    
    DelawareASN StoneRidge LLC
    
    DelawareASN StoneRidge Manager LLC
    
    DelawareASN Studio City LLC
    
    DelawareASN Sussex Commons LLC
    
    DelawareASN Technologies, Inc.
    
    DelawareASN Ventura LLC
    
    DelawareASN Warner Center LLC
    
    DelawareASN Washington Boulevard LLC
    
    DelawareASN Watertown LLC
    
    DelawareASN Wendemere LLC
    
    DelawareASN West End LLC
    
    DelawareASN Wisconsin Place (Retail) LLC
    
    DelawareASN Wisconsin Place (Residential) 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-Washington Holdings (1) LLC
    
    DelawareBrandywine Apartments of Maryland, LLC
    
    DelawareCapital Mezz LLC
    
    DelawareCasco Dunwoody LLC
    
    DelawareCasco GP LLC
    
    DelawareCasco Properties LP
    
    DelawareCasco Property Trust LLC
    
    DelawareCasco TN GP Inc
    
    DelawareChateau Marina Junior Mezzanine, LLC
    
    DelawareChateau Marina LLC
    
    DelawareChateau Marina Senior Mezzanine, LLC
    
    DelawareChateau Marina, L.P.
    
    CaliforniaCourthouse Hill LLC
    
    DelawareFiji Chateau Mezzanine, Inc
    
    DelawareFiji Chateau, Inc.
    
    DelawareFiji Villas Junior Mezzanine, Inc.
    
    DelawareFiji Villas Senior Mezzanine, Inc.
    
    DelawareFiji Villas, LLC
    
    DelawareFirst Herndon Associates LP
    
    DelawareFirst Multifamily Properties LLC
    
    DelawareGolden State Mezz LLC
    
    DelawareHacienda Cove, LLC
    
    FloridaKatahdin GP LLC
    
    Delaware




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##### 



Subsidiary Name
    
    OrganizationKatahdin Properties LP
    
    DelawareKatahdin Property Trust LLC
    
    DelawareKV Construction Incorporated
    
    DelawareLas Palmas LLC
    
    FloridaMetropolitan Acquisition Finance LP
    
    DelawareMIV (1) LLC
    
    DelawareMIV (2) LLC
    
    DelawareMonadnock Property Trust, LLC
    
    DelawareMonadnock Texas LP
    
    TexasPanorama Insurance Ltd.
    
    BermudaPTR- California Holdings (3) LLC
    
    DelawarePTR- California Holdings (1) LLC
    
    DelawarePTR- Colorado (1) LLC
    
    DelawareSCA Florida Holdings (2) LLC
    
    DelawareSCA-North Carolina (1) LLC
    
    DelawareSCA-North Carolina (2) LLC
    
    DelawareSCA North Carolina Limited Partnership
    
    DelawareSecond Multifamily Properties LLC
    
    DelawareSecond Multifamily Limited Partnership
    
    TexasSecurity Capital Atlantic Multifamily LLC
    
    DelawareSmith Property Holdings 2000 Commonwealth L.L.C.
    
    DelawareSmith Property Holdings 4411 Connecticut Avenue LLC
    
    DelawareSmith Property Holdings Alban Towers L.L.C.
    
    DelawareSmith Property Holdings Alban Towers Two L.L.C.
    
    DelawareSmith Property Holdings Ballston Place L.L.C.
    
    DelawareSmith Property Holdings Buchanan House L.L.C.
    
    DelawareSmith Property Holdings Columbia Road L.P.
    
    DelawareSmith Property Holdings Consulate L.L.C.
    
    DelawareSmith Property Holdings Cronins Landing L.P.
    
    DelawareSmith Property Holdings Crystal Houses L.L.C.
    
    DelawareSmith Property Holdings Crystal Plaza L.L.C.
    
    DelawareSmith Property Holdings Crystal Towers L.P.
    
    DelawareSmith Property Holdings Five (D.C.) L.P.
    
    DelawareSmith Property Holdings Five L.P.
    
    DelawareSmith Property Holdings Four L.P.
    
    DelawareSmith Property Holdings Harbour House L.L.C.
    
    DelawareSmith Property Holdings Illinois Center L.L.C.
    
    DelawareSmith Property Holdings Kenmore L.P.
    
    DelawareSmith Property Holdings Lincoln Towers L.L.C.
    
    DelawareSmith Property Holdings McClurg Court L.L.C.
    
    DelawareSmith Property Holdings New River Village L.L.C.
    
    DelawareSmith Property Holdings One (D.C.) L.P.
    
    DelawareSmith Property Holdings One L.P.
    
    DelawareSmith Property Holdings One East Delaware L.L.C.
    
    DelawareSmith Property Holdings Parc Vista L.L.C.
    
    DelawareSmith Property Holdings Plaza 440 Manager L.L.C.
    
    DelawareSmith Property Holdings Reston Landing L.L.C.
    
    DelawareSmith Property Holdings Sagamore Towers L.L.C.
    
    DelawareSmith Property Holdings Seven L.P.
    
    DelawareSmith Property Holdings Six (D.C.) L.P.
    
    DelawareSmith Property Holdings Six L.P.
    
    DelawareSmith Property Holdings Springfield L.L.C.
    
    Delaware




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##### 



Subsidiary Name
    
    OrganizationSmith Property Holdings Superior Place L.L.C.
    
    DelawareSmith Property Holdings Three (D.C.) L.P.
    
    DelawareSmith Property Holdings Three L.P.
    
    DelawareSmith Property Holdings Two (D.C.) L.P.
    
    DelawareSmith Property Holdings Two L.P.
    
    DelawareSmith Property Holdings Van Ness L.P.
    
    DelawareSmith Property Holdings Water Park Towers L.L.C.
    
    DelawareSmith Property Holdings Wilson L.L.C.
    
    DelawareSmith Realty Company
    
    DelawareSMP GP LLC
    
    DelawareTRG-Pembroke Road, LLC
    
    FloridaTurtle Run at Coral Springs L.L.C.
    
    Delaware