Environments at Work, a Haworth office furniture dealer, has signed a 10-year lease extension at 300 A St. in Boston.

The tenant, who is currently leasing 4,243 square feet of space, has entered into an agreement with the property’s landlord that will expand its space an additional 3,959 feet. The build-out is expected to be completed by December, according to a statement.

Neil Schneider and Garrett Larivee of Boston-based McCall & Almy represented the tenant in the lease transaction. The landlord, Brickman, was represented by Chris Cuddy and Peter Conlin of CB Richard Ellis.

"McCall & Almy has been a trusted partner in our real estate activities for several years, and by leading the negotiation efforts to grow within 300 A St., they’ve made it possible for us to remain in this premier location," said Ken Patrick, president of Environments at Work.

"With a client base that is easily accessible from their centrally-located offices, we were pleased to find a solution allowing Environments at Work to acquire the additional space they need without sacrificing convenience," said Neil Schneider, executive vice president and principal at McCall & Almy.