John Wilson McConnell House, Heritage mansion in Ville-Marie, Canada.

The John Wilson McConnell House is a limestone residence of three storeys at 1475 Avenue des Pins Ouest, built of a rectangular central block flanked by two smaller wings and covered in orange terracotta hollow tiles. It holds 67 rooms, and its interior decoration draws on the Renaissance, with coffered ceilings, marble columns and 14th-century Italian fireplaces.

Construction began in 1913 for businessman Jeffrey Hale Burland, who commissioned architect David Jerome Spence. John Wilson McConnell bought the unfinished house in 1924 and had Charles Platt, Kenneth Guscotte Rea and designer Julia Galusha Withcomb complete and enlarge it. The J.W. McConnell family foundation gave it to the Benedictines of Montreal in 1975; they sold it to a private owner in 2001.

The house is named after John Wilson McConnell, the businessman who bought it unfinished in 1924 and lived there until his death in 1963. Its interiors were fitted with material imported from Italy, including 14th-century fireplaces and a bench made in Siena for a pope. The Benedictines of Montreal used it as their priory from 1975 to 2001.

The house sits on Avenue des Pins Ouest in Montreal and is easily visible from the street along this residential avenue. Visitors should know this is a private residence and can only be viewed from outside.

The house passed to the J.W. McConnell Family Foundation, which gave it to the Benedictines of Montreal in 1975 for their priory; the monks sold it to a private owner in 2001. When it was listed again in 2019, the asking price of 40 million dollars made it the most expensive property ever offered for sale in Quebec.