Boston Properties, Inc. is a real estate investment trust (REIT) that invests in office buildings, hotels, and residential properties in Boston, Los Angeles, New York, San Francisco, Seattle, and Washington, DC. As of 2019/12, the company owned or had an interest in 196 commercial properties comprising 52 million square feet of rentable space. The company was founded in 1970 and is headquartered in Boston, MA.