Built in 1890, the house is a high-quality and well-preserved example of Gothic Revival mail-order architecture, being a nearly-intact and faithful rendition of a design pattern published by the architectural firm of Palliser, Palliser & Company, deviating only in the addition of a carriage house.

The Leavitt House is set on the north side of Maine State Route 158, at the northwest corner with Gardner Street.

It is a 1+1⁄2-story wood-frame structure, roughly rectangular in plan, with a multi-gable roof, clapboard and decorative shingle siding, and a three-story pyramid-roofed tower.

Behind this is a secondary entrance similar to the main one, a smaller gable section, and the carriage house, a 2+1⁄2-story structure with two bays and a gable-roofed square cupola.

The notable deviation from the plans is the addition of the carriage house, which Coburn executed using stylistically similar elements to those present in the pattern.