Concrete starts to pour as Canada’s biggest hospital is being built in Mississauga

One year after the first shovel went into the ground for a new Mississauga Hospital that’s expected to be the largest such facility in Canada when it opens in 2034, the first concrete was poured last week.

Now 12 months removed from the project’s groundbreaking, “we’ve reached another milestone,” Trillium Health Partners said on Friday. “Concrete pours are officially underway for the foundation of The Peter Gilgan Mississauga Hospital and Shah Family Hospital for Women and Children.”

Trillium Health Partners is the organization that oversees Mississauga’s two hospitals in addition to Queensway Health Centre in Etobicoke, just steps east of Mississauga.

The Peter Gilgan Mississauga Hospital, a $13.9-billion “state-of-the-art” health-care centre that will rise up 22 storeys on the same site as the current Mississauga Hospital, will check in at 2.8 million sq. ft. in size when completed. That’s roughly three times the size of the current hospital, which first opened at the southwest corner of Hurontario Street and The Queensway West in 1958.

The new hospital will also house within it the Shah Family Hospital for Women and Children, to be the first such medical facility in Ontario.

Construction began on the Peter Gilgan Mississauga Hospital in June 2025 and excavation of the site was more than 70 per cent complete as of early May 2026, a top hospital official told Mississauga city council at the time.

The site of both the current Mississauga Hospital and the new hospital, to open in 2034, is shown here under construction in June 2026. (Photo: Trillium Health Partners X)

The area that had been cleared is as wide as 15 hockey rinks and three storeys deep, Trillium Health Partners president and CEO Karli Farrow noted in a progress-to-date presentation delivered to the mayor, councillors and senior City of Mississauga staff on May 13.

City council also heard from the hospital in mid-May that:

• Concrete foundation, footings, walls and column work on the new hospital had begun.
• 250 trucks continue to arrive daily at the site as excavation continues.
• A 750-metre-long truck waiting area had been constructed on The Queensway West to help alleviate traffic and other concerns.
• Seven tower cranes had started to arrive at the site in preparation for near-future construction.
• A new roundabout to open off Bronte College Court this summer will enable access to all entrances.
• Hospital construction, at peak, will add 3,000 jobs.
• The economic impact of THP on Mississauga will grow from $500 million each year to $700 million annually when the hospital opens.
• Once complete, the new hospital will add 2,800 health professionals (including some 400 doctors) to the city.
• AI and other leading-edge technology will keep the new hospital at the forefront of health-care delivery.

When it opens to patients and the broader community in 2034, The Peter Gilgan Mississauga Hospital will feature, among other things, 950 patient beds (100 per cent private rooms), a new emergency department to be three times the size of the current ER and nine new and 14 enhanced state-of-the-art operating rooms, which will increase surgical capacity and reduce wait times across the region, officials noted. 

The City of Mississauga is contributing $390 million to the cost of the new $13.9-billion hospital. Infrastructure Ontario is in charge of the project.

One year after groundbreaking, we've reached another milestone 🎉
 
Concrete pours are officially underway for the foundation of The Peter Gilgan Mississauga Hospital and Shah Family Hospital for Women and Children.
 
To mark the moment, government, partners, donors and Team THP… pic.twitter.com/TsTrZpp3YX

— Trillium Health Partners (@THP_hospital) June 19, 2026