Boston Properties is a fully integrated real estate company, organized as a real estate investment trust, that develops, redevelops, acquires, manages, operates and owns a diverse portfolio of primarily Class A office space totaling 50.2 million square feet and consisting of 166 office properties (including nine properties under construction), six residential properties (including three properties under construction), five retail properties and one hotel. The Company is one of the largest owners and developers of Class A office properties in the United States, concentrated in five markets – Boston, Los Angeles, New York, San Francisco and Washington, DC.