The Heintzman House, built in 1817, is located in Thornhill, Ontario and is a designated historic site under the
Ontario Heritage Act.
The Heintzman House Auxiliary was originally comprised of a group of volunteers living in Thornhill who were involved in the campaign to save the house from demolition and to maintain it for future generations.

In 1971 the Heintzman House Auxiliary was formed and an annual craft show fundraiser was organized with all the proceeds going to the refurbishment of the Heintzman House.

A Board of Directors was appointed by the Town of Markham to manage the Heintzman House. The house is rented by local organizations, is used for business meetings, has been used in commercials and film work and is a popular venue for receptions and weddings.

The Heintzman House, one of the oldest homes in the Greater Toronto Area has a long and fascinating history and has been home to many of Thornhill- Markham and Toronto's leading citizens - many of whom are rumoured to still be in residence albeit in spirit only.

Craft show patrons can enjoy lunch in the mansion's elegant main floor parlour believed to encompass the original adobe brick home built prior to 1802 by the property's first owner, United Empire Loyalist, Anthony Hollingshead. Saved from demolition in the 1960's by the Town of Markham, the Heintzman House is a designated historic property protected under the Ontario Heritage Act.

Organized by the volunteers of the Heintzman House Auxiliary, proceeds from the sale will go to the refurbishment of the house. Free Parking. Wheelchair access is available on the main floor.

For further information please call the Heintzman House: (905) 889-7980

For Artisan Craft Show Information Please Email:

For House Rentals Please Email: