Lee County’s Duff Mansion House was built around the Civil War era. Although documentation does not identify a precise construction date or original owner, the house is among the oldest buildings standing today in Lee County. Retaining an abundance of historical woodwork and locally sourced building materials, the house preserves its vernacular design and craftsmanship. The property is locally important also for its associations with the Duff family, early Scots-Irish settlers in the region who became influential in the political and civic life of Lee County by the late 1700s. (The crossroads town of Duffield lies four miles distant from the property.) Other historic resources on the Duff Mansion House property include a mid-19th-century smokehouse, a livestock barn from the early 20th century, and a circa-1940 dairy barn. There are also two prehistoric archaeological sites on the property, with the potential to provide information about indigenous life during the Archaic and Middle Woodland periods.