English: The William Lane Cooper House is located at 14 Colborne Street, in Thornhill in the Town of Markham. The one-and-a-half-storey board and batten and clapboard residence was constructed circa 1846. The William Lane Cooper House is an interesting combination of the Pioneer Georgian and saltbox styles. Evidence of the Georgian influence is found in the symmetrical facade featuring a central entrance and flanking windows as well as the placement of the chimneys located on the east and west elevations. White trim, the favoured colour for Georgian houses, frames the windows. A view of the east elevation of the residence illustrates that the house is indeed of saltbox design with no break in the roof.