Heintzman House is one of the oldest building in Thornhill — Markham. It features the earliest mudhouse in the province. Made of adobe brick, fired brick and farm construction, it is also known as the Sunnyside Manor Farm.
In 1798 this property was awarded to United Empire Loyalist, Anthony Hollingshead. In 1817, possibly upon the death of Anthony, the Hollingshead family sold the property. Based on land registry records, the second owner was the Honourable George Crookshank of York (Toronto). George, the son of a Loyalist, was a prominent member of Upper Canada society devoting much of his professional career to government service. He transformed the farmhouse into a 13-room mansion.
Over the years, the property passed through many hands before the final private owner, Charles Theodore Heintzman, purchased it in 1930. The Heintzman family is famous for their piano business. In 1984 the Heintzman House received designation as a heritage site under the Ontario Heritage Act.
The venue offers romantic event spaces for hosting ceremonies and receptions. The front grounds provide an ideal space for ceremonies and the Grand Ballroom is perfect for hosting receptions. The venue has the capacity to accommodate around 113 guests.
"The Heintzman House is absolutely stunning, and provided a beautiful, historic backdrop for my
special day. The staff at the City provided exceptional customer service and made the experience truly delightful!" —Wedding testimonial
Lounges and Bridal Suite
Our space offers several lounges for your guests to mix and mingle throughout your event. If you are renting the Heintzman House for a wedding, separate suites are provided for the bride and groom.
Services Offered
The Heintzman House provides the following:
- Venue set up
- Tables and chairs
- Dishes, cutlery, and bar glasses
- Air conditioning
- Free parking
We have a listing of catering, bar, decorations, and stemware services that you can use for your wedding. You are also welcome to use your own vendors.
Corporate Events & Meetings
Are you looking for a private meeting space? Our venue offer three spaces:
- Thornhill Room; Seats 10
- Loyalist Room; Seats 10
- Heintzman Room; Seats 12
"We've hosted several team meetings, corporate retreats and client events at this location. It is spacious and offers several options depending on the size of your group and the type of event you're hosting."
Banquets & Family Events
The Heintzman house is a beautiful backdrop for events and banquets — everything from an awards banquet to a wedding anniversary celebration to a wedding or baby shower.
"My husband and I are about to celebrate our 30th wedding anniversary. We had our reception at the historic Heintzman House. It was a beautiful venue and brings back great memories."
Halloween Haunt
Date: October 31, 2019
Time: 5 to 9 PM
BOO! Trick or treat at the Heintzman House this year! The historic estate will turn into a spooky haunted house and we’ll be handing out loot bags (while quantities last).
Can the rental be extended beyond midnight?
Because Heintzman House is in the middle of a residential neighbourhood, we need to be very aware of how we impact the community. All full day rentals need to end at midnight (music off, all food service and bar shut down). You will be allowed one hour from midnight to 1 AM to have the final cleanup, packing of personal items and all guests to have gone.
Can I rent on a Sunday or a holiday?
For the same reason as above, we do not operate for rentals on holiday but we do allow rentals on Sundays.
Is there any décor provided with my rental?
Because every function has a different theme, no décor is provided at Heintzman House. We provide a list of service providers that can help you get started in your search for vendors.
Are there any decorating restrictions?
Candles must be glass-enclosed (no open flames.) Only painters tape is allowed in order to temporarily fix decor. For attaching items to the bannister, only floral wire, pipe cleaners or ribbon is acceptable. Renters are responsible for any surfaces that are damaged by décor. All décor must be removed by the end of the rental agreement.
Does Heintzman House provide A/V equipment?
No – most DJ’s will be able to supply you with all required audio and visual equipment, including cordless microphones, speakers etc.
Does Heintzman House book more than one function per day?
No – as a renter, yours will be the only function booked at the facility.
