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 Cambridge Medical Properties, LLC, a Delaware limited liability company 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 Tucson-Cal Associates, LLC, a Delaware limited liability company 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