Founded in 1917, Trumbull-Nelson has been serving New Hampshire and Vermont clients for over a century. Our company has grown from its beginnings as a builder of fine homes in the Hanover, New Hampshire area to become the Upper Valley’s largest Construction Services firm, specializing in all types of institutional, commercial, industrial, and residential construction. Through the time-honored approach of delivering personal and professional service with integrity, we have become one of northern New England’s most respected construction companies. Tradition. Innovation. Performance.