Heintzman House

Heintzman House is a heritage property in Markham containing 13 rooms with distinctive black walnut paneling and detailed architectural moldings. The structure displays Victorian-period craftsmanship throughout its interior spaces.

The property began in 1816 as a modest two-room brick structure built for a United Empire Loyalist. Later owners gradually expanded and refined it into the larger mansion that stands today.

The house serves the community through tours and events that show how people lived during early settlement times in the region. Visitors can see the craftsmanship and the way rooms were organized for daily life in the 1800s.

The property can be rented for events with up to 100 guests and offers on-site parking and wheelchair access. Visitors should contact ahead about specific needs to ensure the best experience.

The structure started as one of Ontario's earliest mud-brick buildings in 1816, showing how construction techniques evolved in the region. Over decades it was gradually updated with new materials and methods that can still be seen in its varied construction layers.

Location: Markham

Inception: 1816

Part of: Thornhill Heritage Conservation District

Address: 135 Bay Thorn Drive

GPS coordinates: 43.82380,-79.41640

Latest update: December 12, 2025 09:03