This 2-1/2 story wood frame house in Acton, Massachusetts was built in 1760, and is one of the town’s best-preserved colonial-era houses. It is an unusual double house, consisting of one section with a square plan, and the other with a typical colonial “half house” plan, having three bays and an off-center chimney. The house was built by Jonathan Hosmer, Jr., a bricklayer whose workmanship is evident in the house’s many fireplaces. Hosmer was also prominent in civic and military affairs; he served (along with his son, who was killed at 17 years old) in the 1777 Battle of Bennington. The home was later owned by Jonathan’s son Simon, who may have added the attached dwelling, creating the double-house form we see today. In 1974 the property was acquired by the Acton Historical Society, which rents one of the units, and operates the rest of the property as a museum. The home is a great example of a Georgian double-house with a saltbox roof.