The farmhouse is built of local stone in random rubble, with a porch and gable ends of brick, and exterior walls in lime mortar. It is the only stone house of the 17th century in New England to survive with exterior walls intact. Floors and roof are timber framed, with major framing beams and joists set in pockets of the exterior walls. Molded bricks in a variety of shapes and fabrications embellish the entrance niche and arched openings. The original arched windows were replaced with smaller, Georgian windows by Nathaniel Tracy in the 18th century.

Today's floor plan with central chimney and rear ell is essentially original, but for the added partitions in east and north chambers. The original central chimney's foundation, supported by two broad brick arches, survives in the cellar; but above this point the central chimney was torn down in the late eighteenth century.

A tenant farmer building is to the rear, connected with the main house by a breezeway. Outbuildings include a carriage barn (now converted to museum space) and a large barn. Some 230 acres (93 ha) of farmland is still in productive use and contains walking paths for the public. The house itself has been arranged to be suitable for children's visits. Exhibits include a parlor restored to early nineteenth-century style and set for tea, kitchen restored to the 1930s, and dining room set exactly as when recorded in the 1940s. They explain the archaeological excavations and display furniture, 18th century glass and ceramic vessels reconstructed from shards found at the site.