WELCOME
This website is a source of useful information for people living in Markham’s Ward 1. In addition to keeping you informed, we’d also like to hear from you.
If you have questions or comments about issues and concerns in Ward 1, please contact us using the “Contact” link at the bottom of this page.
MappiT
While we endeavour to keep the list of Ward 1 development applications up-to-date, things can change frequently.
We encourage you to also visit “MappiT” the City of Markham’s Development Application Viewer.
Members of the public can search various development applications city-wide as well as tree removal permits to check on their status.
MappiT can be viewed here: https://markham.maps.arcgis.com/apps/dashboards/891da101b4a348859874886aeef70d79
LATEST NEWS
Metrolinx YNSE Construction Notice: Median removal at Yonge Street and John Street
Metrolinx Construction Notice April 21, 2026 Topic: Median removal at Yonge Street and John Street Schedule: Early May 2026 Duration: Approximately two weeks Timing: Weekdays, 7:00AM to 5:00PM; occasional weekend or overnight work as required What is happening? Crews working on behalf of Metrolinx will be performing preliminary work
Metrolinx YNSE Construction Notice: Road widening on Yonge Street south of John Street
Metrolinx Construction Notice April 21, 2026 Topic: Road widening on Yonge Street south of John Street Schedule: Mid-May 2026 Duration: Approximately two weeks Timing: Weekdays, 7:00AM to 5:00PM; occasional weekend or overnight work as required What is happening? Crews working on behalf of Metrolinx will continue with preliminary work,
Temporary Road Closure Notice: Bayview Avenue between Laureleaf Road and Barristers Court
Temporary Road Closure Notice April 15, 2026 Topic: Region of York Temporary Road Closure Notice: CN Rail Bridge on Bayview Avenue between Laureleaf Road and Barristers Court Schedule: Tuesday, April 21, 2026 Work Hours: 9:30AM-3:30PM What is happening? Temporary road closures of Bayview Avenue, between Laureleaf Road and Barristers
City of Toronto Construction Notice: Steeles Avenue Bridge Rehabilitation over Don River
City of Toronto Construction Notice January 6, 2026 Topic: City of Toronto Construction Notice: Steeles Avenue Bridge Rehabilitation over Don River Schedule: Start Date: July 2025 End Date: December 2025 New End Date: Summer 2026 Work Hours: Monday - Friday 7:00AM - 7:00PM; Saturday 9:00AM - 7:00PM What is
Metrolinx YNSE Construction Notice: Closure of Langstaff GO South parking lot
Metrolinx Construction Notice March 31, 2026 Topic: Closure of Langstaff GO South parking lot Schedule: Closure begins April 28, 2026 Timing: Full 24 hour closure of impacted work areas What is happening? To support future construction for the Yonge North Subway Extension, crews working on behalf of Metrolinx will
Meetings of Interest
for Ward 1 Thornhill Residents
| When | Topic | Details |
|---|---|---|
| Friday, April 24 - Sunday, April 26 Friday: 12:00 - 4:00 p.m. Saturday & Sunday: 10:00 a.m. - 5:00 p.m. | The Heintzman House 2026 Art Show and Sale Heintzman House 135 Bay Thorn Drive | Spring Into Colour at the Heintzman House Art Show and Sale, a prestigious exhibition celebrating creativity and artistic excellence. This highly anticipated event showcases the work of 34 new and returning artists, presenting an extraordinary collection of more than 900 pieces available for purchase. From vibrant contemporary works to timeless classics, the show offers an inspiring range of styles and genres to suit every taste. New this year: a lively interactive art experience where patrons of all ages—artists and non-artists alike—are invited to add their colorful marks to a collaborative modern artwork, celebrating creativity in all its forms, where every visitor becomes part of the masterpiece. A small $2.00 donation to participate will support the local food bank, making your artistic touch both meaningful and impactful. For more information, please visit the Heintzman House website: https://theheintzmanhouse.ca/hhas. |
| Saturday, April 25 10:00 a.m. - 1:00 p.m. Rain date: Sunday, April 26. | Grandview Area Residents Association Park and Woodlot Clean Up Pomona Mills Park 244 Henderson Ave. Meet at the east side of Henderson Avenue and Forest Park Crescent | * Rain or shine * Everyone is welcome - children under the age of 12 should be accompanied by an adult * Students can earn volunteer hours - please bring your form * Bags and gloves will be provided * Light refreshments will be available For more information, please visit the Grandview Area Residents Association website: https://www.thornhillgara.com/. |
| Sunday, April 26 10:00 a.m. - 12:00 p.m. 10:00 a.m. Litter Clean Up 11:30 a.m. Guided Bird Watching Walk | Pomona Mills Conservationists Community Litter Clean Up and Guided Bird Watching Walk Pomona Mills Park 244 Henderson Ave. Meet at the east side of Henderson Avenue and Forest Park Crescent | * Rain or shine * Everyone is welcome * Students can earn volunteer hours * Refreshments generously provided by the Thornhill Historical Society - please bring your own cup * Zero waste event * New this year - Guided Bird Watching Walk following the litter clean up For more information, please visit the Pomona Mills Conservationists website: http://www.thornhillwardone.com/. |
| Monday, April 27 7:00 - 9:00 p.m. | Bayview / John Visioning Exercise: Final Session Thornhill Community Centre Room B1 & B2 | Councillor Irish will be hosting an in-person Community Information meeting to review the city’s Planning staff recommendations resulting from the Bayview / John Visioning exercise. Residents will recall that three well attended public engagement sessions were held a year ago on the following topic areas: Urban Design, Built Form and Land Uses; Transportation and Mobility; and Community Uses. This session will include a presentation of the high-level recommendations and opportunities for the public to comment. The file outlining the recommendations will be posted in due course. In the meantime, information can be found here: https://yourvoicemarkham.ca/bayview-and-john-visioning-exercise/ The presentation materials from the city's Planning staff can be found here: Bayview John Final Session Presentation April 2026 Councillor Irish looks forward to seeing you there. |
| Friday, May 8 and May 15 8:00 a.m. - 4:00 p.m. | Environmental Services 2026 Spring Compost Giveaway R.J. Clatworthy Arena | * Residents will be invited to register online via the city's website beginning on Earth Day April 22, 2026 to pick-up two free bags of compost at one of the events * One registration per household (two bags per registration) * Spaces are limited and are available on a first come, first serve basis * Residents are able to cancel and re-register for a different day if spots are available * Events are rain or shine |
| Saturday, May 23 10:00 a.m. - 12:00 p.m. | Grandview Area Residents Association Park Planting Pomona Mills Park 244 Henderson Ave. Meet at the east side of Henderson Avenue and Forest Park Crescent | * Rain or shine * A variety of native perennial plants will be planted in the woodlot * Everyone is welcome - children under the age of 12 should be accompanied by an adult * Students can earn volunteer hours - please bring your form * Light refreshments will be available For more information, please visit the Grandview Area Residents Association website: https://www.thornhillgara.com/. |