Doors Open Ontario presenting sponsor
Doors Open Ontario presenting sponsor

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Doors Open Ontario:

Markham

in-person event information

Saturday, September 20, 2025, from 10 a.m. to 5 p.m.

Since 2003, Doors Open Markham has brought together thousands of people from near and far to celebrate and experience Markham’s rich history and unique sites through Doors Open. 

Markham is again hosting Doors Open Markham in 2025. Our theme this year is "Markham’s learning landscape," which will focus on all things educational, both historical and contemporary — from historical school facilities to unique, modern educational facilities such as the new York University Markham Campus. Of course, we have also included several sites that have been popular with visitors in the past, including our two historical railway stations, which were once used by students to attend high school in Markham Village. 

Mark your calendars! We are looking forward to welcoming you again to the amazing sites Markham has to offer.

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4 In-person Doors Open sites

Cedar Grove Community CentreDoors Open Markham

New

  • In-person Doors Open Ontario

Cedar Grove Community Centre

Public School S.S. No. 20, built in 1869, replaced an earlier log schoolhouse to serve the local Mennonite and Presbyterian communities. The current structure is a particularly handsome and well-preserved example of the single-room Victorian-era schoolhouse. Home to students for almost 100 years, it was closed in the 1960s. but continues to serve the local community as a meeting facility.

  • Adaptive reuse
  • Parking
  • Self-guided tours available
  • Washrooms
  • Photography allowed
  • Rental opportunities

Contact info

7667 14th Avenue
Markham, Ontario

Architecture

Year built: 1869
Building type: Educational facility
Architect: Unknown

Dates/hours open

Sep 20 - Sep 20

Heintzman HouseDoors Open Markham

  • In-person Doors Open Ontario

Heintzman House

Heintzman House is one of the oldest buildings in Markham. Originally built as an adobe brick cottage dating from the early 19th century, the house was enlarged by Colonel George Crookshank in 1817. Charles T. Heintzman, grandson of the founder of Toronto’s Heintzman Piano Company, purchased the property in the 1930s and transformed the house into its present, elegant form.

  • Full wheelchair access
  • Parking
  • Self-guided tours available
  • Site is protected by the Ontario Heritage Trust
  • Washrooms
  • Photography allowed
  • Rental opportunities

Contact info

135 Bay Thorn Drive
Markham, Ontario
https://www.markham.ca/heintzmanhouse

Architecture

Year built: 1816
Building type: Attraction Historical landmark Historical house

Dates/hours open

Sep 20 - Sep 20

York Region District School Board’s Museum & ArchivesDoors Open Markham

New

  • In-person Doors Open Ontario

York Region District School Board’s Museum & Archives

Located in the former Brown’s Corner/Buttonville Schoolhouse, the York Region District School Board’s Museum & Archives collects and preserves the history of public education in York Region. The collections, from the 1850s, reflect ongoing changes to public education. Come and experience life as a student in the late 1800s by writing with pen and ink and on a slate.

  • Adaptive reuse
  • Kid-friendly
  • Parking
  • Partial wheelchair access
  • Self-guided tours available
  • Washrooms
  • Photography allowed

Architecture

Year built: 1872
Building type: Museum Schoolhouse

Dates/hours open

Sep 20 - Sep 20

York University's Markham CampusDoors Open Markham

New

  • In-person Doors Open Ontario

York University's Markham Campus

York University’s new state-of-the-art campus is in Markham Centre, the community’s new downtown. The design of this building defines a collegial academic community within a series of interconnected, multi-storey spaces. Academic programs and research revolve around technology and entrepreneurship. Come and take a tour of this fascinating site. Parking is available at the Pan Am Sports Centre next door.

  • Full wheelchair access
  • Guided tours available
  • Kid-friendly
  • Parking
  • Washrooms
  • Photography allowed

Contact info

1 University Boulevard
Markham, Ontario
Email: markham@yorku.ca
https://www.yorku.ca/markham

Architecture

Year built: 2024
Building type: Educational facility
Architect: Diamond Schmitt Architects

Dates/hours open

Sep 20 - Sep 20