The chapel is a modest single-story wood-frame structure, with a steeply pitched gable roof, and an exterior finished in a combination of wooden shingles and board-and-batten siding.

It is oriented with its long axis parallel to the road, with a band of sash windows offset to the left of center on the street-facing facade, and a hip-roofed entrance porch to the right.

There are decorative sawn brackets at the lower edge of the roof where it flare out slightly.

[3] The chapel was built in 1894–95 by volunteer labor organized by the Yarmouth First Baptist Church, to provide a place of worship for the residents of Cousins and Littlejohn Islands.

The chapel is one of a series of architecturally distinctive coastal chapels built in Maine during the late 19th century, although it is distinguished from the others in that it was built for year-round residents, rather than for summer visitors.