Opelikas George W. Andrews Federal Building and U.S. Courthouse is a Neo-Classical Revival Style building located near the citys central commercial core. Completed in 1918, the building occupies the southwest corner of the intersection of South Seventh Street and Avenue A. Its faade faces north and is seven bays wide with a central five-bay pavilion. The side elevations are four bays wide. On the rear elevation, the first floor extends for one bay beyond the face of the floors above. Also on the rear elevation is a wood frame mailing platform. Green space on the site is limited to narrow strips of grass adjacent to the base of the building. Holly bushes have been planted at the base of the faade flanking the main entry stair. A paved parking area is located along the south and west sides of the building and is enclosed with an approximately 6 tall iron security fence.
The Federal Building and Courthouse is rectangular in mass and three stories tall over a full basement. A balustraded parapet wall conceals a flat/low-slope roof. The building is faced with a deep red brick veneer over a masonry and concrete slab structure. A granite water table terminates the brick faced basement level. The buildings first story has deep rustication channels set into the brick masonry which angle down at the voussoirs of the arches over the windows. This arrangement results in unique elongated voussoirs above the first floor openings. The building entrance is articulated by five deeply recessed arches. The three central arches contain wood paneled, double doors, while the outside arches contain ten-over-ten, double-hung sash windows. A wide granite stair leads to the main entry bays, over which there are metal letters mounted to the masonry that indicate the name of the building; George W. Andrews Federal Building. The four original cast iron sconces set between the entry bays were replaced with modern fixtures in the 1960s.
A terra cotta belt course separates the first and second stories on all elevations. The pavilion is articulated by massive pilasters with stone bases and capitals. Within the pavilion the second story windows have arched heads and contain ten-light French doors surmounted by four-light transoms. The French doors lead to false balconies with decorative iron rails. Within the tympanum of the arched windows are terra cotta block panels with decorative relief. The other windows on the second floor have flat heads. The third floor windows are eight-over-eight, double-hung sash with flat heads. The third floor windows match those in the outer bays of the first floor.
The east and west elevations are identical. A terra cotta cornice, with dentils and a brick frieze, is present on all elevations. Above this is a brick parapet wall with a terra cotta cap and balustraded panels over each bay. The low slope roof is set behind the parapet wall and is not visible from the street. A brick elevator penthouse and chimney extend above the roof level.
On the rear elevation, the outermost bays are identical to the corresponding bays on the faade. The first floor of the rear elevation extends out beyond the floors above and its rear wall is almost entirely fenestration. Each bay of the one-story extension contains three, 15-light windows surmounted by six-lite transoms, separated by paired pilasters. Extending from the center of the rear wall is a wood frame mailing platform. The mailing platform has a series of framed openings that contain no windows. The interior of the mailing platform is presently open to the weather.
At the second floor level of the rear elevation are tall, arched twenty-four-light, courtroom windows. The lower unit of these windows is operable while the arched upper unit is fixed. Within the projecting pavilion, the Courtroom windows are flanked by twelve-over-twenty, double-hung sash units. Above these, at the third floor level, are oculus embellished by four keystones. Above the Courtroom windows are three inset brick panels. The balustraded panels within the parapet wall are present above the three Courtroom windows.