The house at 6-8 Maple Avenue in Unionville was built in 1882-1883 as a double house by Abner Slade Hart (1823-1912) and his son, Henry W. Hart (1858-1931). As described in the Illustrated Popular Biography of Connecticut (1891)
Abner S Hart was a member of the general assembly in 1887, representing the town of Farmington in the house. Mr. Hart cast his first vote for Henry Clay for president in 1844 and has since been a member of the whig and republican parties. He was born in Barkhamsted, July 15, 1823, and received a thorough education, preparing him for the avocation of teaching in the public schools. He pursued that calling for fourteen years, teaching winters and farming through the summer. In 1866 he established himself in the drug business at Riverton and became postmaster there in 1869. The latter position was retained for twelve years. He has held various local offices, including that of acting school visitor for fourteen years and chairman of the board of relief. Since 1881 he has resided at Unionville, where he is engaged in mercantile pursuits. Mr. Hart is a member of Evening Star Lodge, No. 101, F. and A. M., of Unionville. He is descended from revolutionary stock, both of his grandfathers having served in the war for independence. He has in his possession a sword that was carried in the service by one of them. Mr. Hart is a prominent citizen of Unionville, and is held in thorough esteem in that community as well as in his old home in Barkhamsted.
Abner S. Hart had three sons with his first wife, Julia. The older two continued in business in Riverton, while the youngest, Henry, joined his father in Unionville, where Abner lived with his second wife, Margaret. Abner retired from his store, called A. S. Hart and Son, in 1896, and the business was continued by Henry under the name H. W. Hart and Company. The house remained in the Hart family until 1937. In recent years, it has had significant alterations, with a redesigned entryway and windows, a new porch, and the addition of a rooftop cupola, which is in keeping with the building’s Italianate style.