The House on Ardwold Gate was constructed in 1968 by Estonian-Canadian architect Taivo Kapsi. It is located between St. Clair Station and St. Clair West Subway Station, within the study area for the potential Casa Loma Heritage Conservation District, where multiple landmarks in Toronto can be found, such as Casa Loma and the Spadina Museum.

The House on Ardwold Gate was designated as part of the City of Toronto Heritage Register on the 25 February 1992; it is considered one of the few residential Brutalist architectural style buildings in Toronto.

It was built for Richard Mauran, the founder of Swiss Chalet and Harvey’s. The plot of land the residence sits on was initially bought by Sir John Craig and Lady Eaton in 1908, and their home, which was located on the 11-acre estate of Ardwold Gate, was erected in 1911. The estate was named Ardwold Gate, as it means ‘High on a green hill’ in Gaelic; this comes from the fact that Ardwold Gate is located on land that overlooks the city around it, as it is substantially higher than the ground level of its neighbour, Roycroft Park Lands. The house on the estate was demolished after the death of John Eaton, and the land was subdivided by LePage real estate agents. Taivo Kapsi unfortunately did not live to see this project completed - he died in 1967 at age 31.

Key elements related to prominent architectural features in the residence:

• Exterior walls made of cast-in-place concrete;
• Interior walls made of cast-in-place concrete;
• Saw-cut timber forms used to achieve rough textures effect of concrete;
• Continuous line of windows evident on the main facade;
• Two-storey building height;
• Massing of residence made up of horizontal and vertical elements;
• Large front yard entrance;
• Interior ceiling covered with cedar ceiling boards; and
• Cantilevered terrace overlooking Roycroft Park Lands.

• Architect - Taivo Kapsi  <-- More buildings by this architect.
• Structural engineer - L. Maimets and J. Sepp