The Timothy Hart House stands in what is now a rural-suburban residential area of northeastern Southington. It is located on the east side of Flanders Road, south of its junction with Flanders Street. It is a -story wood-frame structure, with a gabled roof and clapboarded exterior, set on a partial basement of ashlar brownstone. It has a central chimney that is a replacement of the original. Its formal front facade is oriented facing south; it is five bays wide with the entrance at the center. The street-facing west facade has an exposed basement level owing to the sloping site, with a secondary entrance at the center of three bays, three windows on the main level, and three more in the attic level. Original interior features include a winding central staircase, wide floorboards, and three fireplaces, one with a period oven.
