The two-family house at 187-189 Main Street in Unionville (in Farmington) was built around 1885 as a rental house by Minerva Upson Frisbie, wife of Samuel Frisbie, a treasurer of the Upson Nut Company (he also had a number of patents for machines). The house is trimmed with decorative features in the Stick style, such as sunbursts.
The Italianate house of George Dunham, on Lovely Street in Unionville, was built in 1868. The front portico with columns was added later. In 1860, together with A.S Upson, Dunham had acquired a company which produced nuts and bolts. Originally called Upson and Dunham, the company incorporated in 1865 as the Union (later the Upson) Nut Company. Dunham invented the Dunham forged nut machine and would go on to invent a number of others.