LHD boundaries as described are approximate and subject to change. Consult the LHD Study Report on file with the relevant local district commission or municipal authority to verify district boundaries and whether a specific property, particularly one in proximity of a boundary line, is within the district. Also note that LHD boundaries may differ from those of State or National Register Districts.
This 2 1/2- story brick gable-roofed tenement, oriented ridge-to-street, features segmental, arched, four-over-four sash windows with corbelled brick hoods and brownstone sills. The six-bay south elevation features two Italianate-style entry doors, one on each end bay, and two paired window dormers with a clover motif in the dormer pediments. 'N.H. 1875' is inscribed on the building's east elevation. Historically, the building is notable as one of the last remaining tenement buildings constructed for mills workers in Unionville. These multi-family dwellings were typical of mills towns and were constructed within walking distance of the mills. The builder, Nathaniel Hayden (1835-1910), moved to Unionville in 1870 and built the tenement house in the summer of 1875. Title to the building passes to Ernest and Ida Hart in 1916.
The tenement house at 54-56 Maple Avenue is significant architecturally for its well-preserved Italianate features.
 Information retrieved from the town website http://www.farmington-ct.org/.
 Proposed Historic Properties, Historic District Study Report, Unionville Historic District and Properties Commission, 2010, SHPO Library, Hartford.
Assessors information and Parcel IDs retrieved from the website http://www.farmington-ct.org/landrecords/search.php.
Maps and GIS information retrieved from the website http://www.crcog.org/gissearch/Default.aspx.