[1] The Barnes-Frost House is located on the west side of Marion Avenue, north of its junction with Old Mountain Road (Connecticut Route 322).

It is a 2+1⁄2-story wood-frame structure, five bays wide, with a clapboarded exterior, side gable roof, large central chimney, and a centered entrance.

The entrance is flanked by pilasters and topped by a frieze with a band of molded ellipses.

This detail is repeated on the window lintels and in a frieze band below the roof line.

[2] Built c. 1796, the house is significant in part because it is a well-preserved example of Colonial architecture, and also because it was home of the locally prominent Barnes and Frost families.