20 Harrison Court is a 1 1/2 story, 5 bay, rectangular plan, rubblestone and wood frame former carriage house. The c. 1900, slate-clad, side gable-roofed house features a massive, brownstone, round-arched portico with an engaged circular tower surmounted by a conical cap. The side gables are wood shingle clad, and the house is fenestrated with 6/6 windows. The carriage house is part of the former Belle H. March estate on Scotland Road; it is the only building remaining from the original complex.