The Prime Minister’s Cottage is valued for its good aesthetic and functional design. The design is representative of cottage architecture of the 1920s. Stone fireplaces and open verandahs were typical of the informal character of cottage design of the period. When it was constructed, it shared a casual, rustic impression with many other cottages, such as the O’Brien House on nearby Meech Lake. Also notable for its period of construction are the wood and stone materials and the good craftsmanship.
The Summer House and its associated buildings was given Canada's Historic Places designation in 1986 based on the following March 4, 1986 Report