A unique residence in Northampton the Strong House was built during the late 1820's. It was ready for occupancy by Nov. 1, 1828 because Seth Strong reserved the use of the house next north until that date. Seth Strong built both of these houses. He was a prominent local mason of the mid 19th century, employing many workers and described as "the leading master brick builder in this town and region." He spent one year working with Captain Isaac Damon in Bangor, and also worked one season in Baltimore. In this area his major work included U.S. Armory buildings in Springfield, a cotton mill in Florence, and the old County Courthouse in Northampton. Early in his career he served one term as a representative in the state legislature.

The house is two stories, circular, more than 50 feet in diameter built of brick, and plastered on the outside. The plaster was trained a light gray color that gives the appearance of cement. To the rear is a one-story rectangular ell.

The interior of the house is divided by a wide hall running from the front approximately 2/3 of the way towards the rear. There it meets a brick wall that divides the circle into two unequal segments. There are two rooms on each side of the hall in front of this wall. Two rooms are to the rear of this wall. Each of the six rooms has a fireplace on the outside circular wall with a wide chimney at the edge of the conical roof. The roof rises to a point above the center of the house. The second floor has the same arrangement as the first floor. At sometime after 1912 a small portico was added to the front of the house.