It is a two-story wood-frame structure, with a gabled roof and clapboarded exterior.

Sash windows are arranged symmetrically around the centered entrance, the windows topped by shallow projecting cornices, and the entry sheltered by a hip-roofed porch supported by square columns.

The secondary facade facing Walker Hill Road, its original main facade, is seven bays wide with a center entrance framed by pilasters and topped by an entablature and gabled cornice.

In 1851 the religious and municipal functions were formally separated; the congregation purchased a portion of the ground floor, and converted the gallery level into a full second floor, creating a new sanctuary.

Both of these functions were eventually moved to other locations, with the town taking full ownership of the building.