391 Charlton Avenue is a 1 1/2 story, multiple bay, vernacular, wood frame, residential building. Constructed c. 1920, the wood shingle clad structure features a side gable roof over one section, and a gambrel roof over another. Although the building resembles an extended ranch, it is probably a Colonial Revival with many additions. The building has been very altered over time and does not have sufficient integrity to be considered a contributing building.