The Harrington Hotel is a five-story, red brick building located on a corner lot. The design contains elements of Richardsonian Romanesque style, such as a tri-part facade and deeply set round arched windows, and elements of Classical Revival style, such as detailed wooden porches and panel friezes. The two main facades have a symmetrical window positioning, with a single story base section containing large round arched windows in the Military Street facade and smaller windows, placed in groups of three, in the Wall Street facade. The second and third stories contain double-hung windows, and the fourth floor section has large round arched openings each containing a door flanked by windows. The fifth floor section contains small, round arched windows in pairs.[2]
The Wall Street facade includes three windows spanning the second floor level to the fourth. A balustrade originally ran along the top of the building, and metal originally were set into the fourth floor level. The main entrance opens west onto Military Street, and is sheltered by a frame porch with two tiers, composed of Ionic columns with a frieze and balustrade above. A second entrance on the Wall Street side is sheltered by a similar one story portico. A small single story 1930 coffee shop addition extends in front of the Military Street facade, and a 2-1/2 story brick
wing at the rear, original to the hotel, contains the kitchen and mechanical rooms.[2]