Exhibit 21.1 Health Care Property Investors, Inc. List of Subsidiaries Texas HCP, Inc., a Maryland corporation HCPI Mortgage Corp., a Delaware corporation HCPI Knightdale, Inc., a Delaware corporation Texas HCP G.P., Inc., a Delaware corporation HCPI Trust, a Maryland real estate investment trust HCPI Indiana, LLC, a Delaware limited liability company Meadowdome LLC, a Maryland limited liability company Texas HCP Holding, L.P., a Delaware limited partnership HCPI/San Antonio Limited Partnership, a Delaware limited partnership Health Care Investors III, a California general partnership Health Care Property Partners, a California general partnership HCPI/Kansas Limited Partnership, a Delaware limited partnership HCPI/Little Rock, Limited Partnership, a Delaware limited partnership HCPI/Colorado Springs, Limited Partnership, a Delaware limited partnership HCPI/Utah, LLC, a Delaware limited liability company AHE of Somerville, Inc., a Massachusetts corporation AHP of Nevada, Inc., a Nevada corporation AHP of Washington, Inc., a Washington corporation Fayetteville Health Associates Limited Partnership, a Delaware limited partnership Wichita Health Associates Limited Partnership, a Delaware limited partnership HCP Medical Office Buildings I, LLC, a Delaware limited liability company HCP Medical Office Buildings II, LLC, a Delaware limited liability company Texas HCP Medical G.P., Inc. a Delaware corporation Texas HCP Medical Office Buildings, L.P., a Delaware limited partnership HCPI/Idaho Falls, LLC, a Delaware limited liability company HCPI/Wesley, LLC, a Delaware limited liability company HCPI/Utah II, LLC, a Delaware limited liability company HCPI/Stansbury, LLC, a Delaware limited liability company HCPI Investments, Inc., a Delaware corporation HC Properties, Inc., a Maryland corporation Davis North I, LLC, a Delaware limited liability company Perris-Cal Associates, LLC, a California limited liability company Ft. Worth-Cal Associates, LLC, a California limited liability company Louisiana-Two Associates, LLC, a California limited liability company Vista Cal Associates, LLC, a California limited liability company Statesboro Associates, LLC, a California limited liability company Edgewood Assisted Living Center, LLC, a Michigan limited liability company Indiana HCP G.P., Inc., a Delaware corporation Indiana HCP I, Inc., a Delaware corporation Indiana HCP II, Inc., a Delaware corporation Indiana HCP L.P., a Delaware limited partnership Seminole Shores Living Center, LLC, a Michigan limited liability company Greenleaf Living Center, LLC, a Michigan limited liability company Jackson HCP, LLC, a Delaware limited liability company Tampa HCP, LLC, a Delaware limited liability company Fort Austin Real Estate Holdings, LLC, a Delaware limited liability company ARC Santa Catalina Real Estate Holdings, LLC, a Delaware limited liability company ARC Richmond Place Real Estate Holdings, LLC, a Delaware limited liability company ARC Holland Real Estate Holdings, LLC, a Delaware limited liability company ARC Lake Seminole Square Real Estate Holdings, LLC, a Delaware limited liability company ARC Sun City Center Real Estate Holdings, LLC, a Delaware limited liability company ARC Brandywine Real Estate Holdings, LLC, a Delaware limited liability company