A large multiline insurer is buying the 611,000-square-foot office building that its life company now occupies.

Hartford Financial Services Group Inc., Hartford, will buy the current Hartford Life headquarters building, at 200 Hopmeadow St., Simsbury, Conn., when the lease for the building expires in 2010, according to Hartford Life.

Hartford Life has not disclosed the purchase price.

Hartford Life moved into Simsbury in 1986. The life company now employs 3,000 in its headquarters offices and 2,000 in offices in Windsor, Conn., and Avon, Conn.

In addition to buying the Simsbury headquarters building, Hartford Life also is building new offices in Avon.