It is a single-story masonry structure, built out of brick with limestone trim, with a unique pentagonal floorplan.

It presents a broad three-bay front entry facade at an angle to the street intersection, with a projecting Classical four-column portico at the center.

The portico has round Doric columns rising to an entablature and a gabled pediment studded with modillion blocks.

The interior lobby area features brown tile flooring with white marble borders and wainscoting.

It has a unique design, prompted by difficulties of its location, credited to United States Supervising Architect James Wetmore.