It is also one of the least-altered structures by architect Frank Wills and one of only thirteen surviving houses of worship designed by him in the United States.

Afterwards he chose the same firm to design the new sanctuary for his church, since the original building completed in 1847 was already inadequate for the congregation's needs.

The vestry acquired two lots, adjacent to the original church, at the corner of Eustis Avenue and Green Street for $3,923 later in 1856.

[4] It consists of 22,500 custom hand-fabricated interlocking copper shingles, stylized to mirror Gothic Revival architecture.

The ceiling is wood paneled, with the exposed structural oak timbers forming an arched pattern.

The apse is a semi-octagonal projection with three large figural lancet windows that retain their original stained and painted glass.