Excavation has been advancing at the Peter Gilgan Mississauga Hospital site following the official ground breaking ceremony in June, 2025, which marked the start of major construction for Ontario’s largest hospital project ever. Rising at 100 Queensway West on the southwest corner of Hurontario Street and Queensway West, the project will deliver a 22-storey acute-care hospital alongside an 8-storey above-grade parking structure. The facility is being developed by Trillium Health Partners and designed by a multi-firm team of Stantec, Adamson Associates Architects, Parkin Architects Limited, and Jodoin Lamarre Pratte Architectes Inc. 

Concerns around cost have featured prominently in public reporting, particularly following the release of findings from Ontario’s Auditor General. Media coverage has cited an all-in project cost of roughly $14 billion, a figure that reflects not only design and construction, but also financing, lifecycle maintenance, hospital outfitting, and long-term operations over 30 years, rather than construction alone, as outlined in the Auditor General’s report.

Construction costs alone are estimated in the range of $7 billion to $8 billion, translating to a very high cost per square foot for the approximately 2.8 million ft² facility. The Auditor General highlighted risks associated with the project’s procurement model, noting that the hospital advanced with a single bidder.

So far, work has been limited to ground preparations. In October, 2025, as seen below, excavation was well underway, with a substantial below-grade pit carved out across the northern portion of the site. Multiple shoring rigs indicate active installation of drilled shoring. In the foreground and central staging area, stockpiled materials are organized, while dump trucks and excavators circulate through the site. To the south, a portion of the former surface parking lot remains temporarily intact, accommodating site trailers and parked vehicles.