The David B. Colwell House is a two-and-one-half story square brick Italianate house with a small, one-story addition constructed some time in the twentieth century. The front facade has a Classical gabled portico over an entry door with sidelights and an entablature. The windows on the first and second floor are four-over-four double hung sash units, placed symmetrically. Windows have stone lug sills and lintels. A brick beltcourse separates the second and attic stories. The attic story has small rectangular windows located in the frieze. The house has a low-pitched hip roof with overhanging eaves, covered with light red tiles added at a later date.