Renovation of 24 Sussex could cost taxpayers up to $150-million, say sources

The government established a two-stage competitive procurement process using a design-build delivery model where a builder who would be responsible for both the design and construction partners with architects and consultants. The competition and procurement process that will be open to eligible Canadian firms is under scrutiny for its limitations.
Prime Minister Mark Carney, centre, flanked by prominent Canadian architect Moshe Safdie, left, Rideau Hall Foundation Board chair J. Robert Prichard, and Public Works Minister Joël Lightbound, speaks with reporters outside 24 Sussex Drive on June 26, 2026, about plans for the prime minister’s official residence.

The federal government's procurement process for 24 Sussex Dr. creates a risk of delays and cost overruns due to a lack of a defined budget and timelines before the project starts, critics say, as the government extends the deadline for request for qualifications for firms c...

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