Kilroy Realty Corporation is a real estate investment trust (REIT). The Company operates through the office properties segment. It operates in office and mixed-use submarkets along the West Coast. It owns, develops, acquires and manages real estate assets, consisting primarily of Class A properties in the coastal regions of Los Angeles, Orange County, San Diego County, the San Francisco Bay Area and Greater Seattle. It owns its interests in all of its real estate assets through Kilroy Realty, L.P. (Operating Partnership) and the Kilroy Realty Finance Partnership, L.P. (Finance Partnership). Its stabilized portfolio includes all of its properties with the exception of development and redevelopment properties under construction or committed for construction, lease-up properties, real estate assets held for sale and undeveloped land. As of December 31, 2016, its stabilized portfolio of operating properties included 108 stabilized office properties and a stabilized residential property.