The merger came three years after Rockland Trust acquired East Boston Savings Bank, which added 26 branches throughout Greater Boston and three commercial lending centers in a $1.15 billion deal.

Rockland Trust owns its current 22,000-square-foot headquarters, about five miles away in Hanover, and will put that property on the market; the other spaces are leased.

Rockland Trust CEO Jeff Tengel said at the time of the agreement that he didn’t expect to close any of Enterprise Bank’s 27 locations in the Merrimack Valley and southern New Hampshire, and ...