The Peter Gilgan Mississauga Hospital

Canada is building one of the most expensive hospitals in its history. The Peter Gilgan Mississauga Hospital, a full replacement of Trillium Health Partners’ aging Mississauga campus, carries a fixed-price contract of $13.9 billion. An EllisDon and PCL joint venture is building it, with ground broken in June 2025.

Project Scope

• A 22-storey, 2.8-million-square-foot facility delivered alongside the Shah Family Hospital for Women and Children.
• More than 950 beds in total, including over 350 new fully private beds in a new patient-care tower.
• An expanded emergency department, advanced diagnostic imaging, a new pharmacy, and a new clinical laboratory.
• Designed by Jodoin Lamarre Pratte Architectes, built by an EllisDon-PCL joint venture for Trillium Health Partners and Infrastructure Ontario.
• Construction targeted for completion in 2033, with the move to hospital operations in 2034.

Why It Matters

This is a rare full-replacement hospital, not a wing bolted onto an old building. Ontario is delivering it through a progressive public-private partnership, where the owner and builder shape scope, price, and schedule together before locking the contract, an approach meant to wring surprises out of a project this size before crews break ground. The dollar figure reflects more than inflation. It’s the cost of replacing an entire acute-care campus while the old one keeps treating patients next door. For a region the size of Mississauga, the build is a generational reset of how and where people get care.

Project Team & Details