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2026/Nov/10
TSA Technical Series: Updating Toronto’s Foundation Drainage Policy
Lecture
Start Time: 2026/Nov/10 12:00 PM
End Time: 2026/Nov/10 1:00 PM
Location/City: Online
city of toronto
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tsa
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foundation drainage policy
A webinar on the City of Toronto’s Foundation Drainage Policy, lessons learned since its implementation, and recent amendments.
Increased storms and flooding have drawn greater attention to the city’s stormwater management, especially the combined sewer system which carries both domestic waste and urban runoff. In effect since 2022, the City of Toronto’s Foundation Drainage Policy (FDP) aimed to preserve this limited infrastructure by prohibiting any groundwater discharge from new developments into the system. While well-intended, the policy has had significant side effects, forcing many sites to use costly, watertight “bathtubbed” foundations and adding millions in costs to project budgets—including for much needed housing. After significant industry advocacy, a series of amendments is coming into effect on October 1, 2026, which aim to strike a balance between protecting the city's sewer capacity and reducing unnecessary construction barriers.
Join TSA for a lecture with Michael Diez de Aux—Principal at Grounded Engineering and one of the advocates behind these amendments—as they examine the FDP, its impact on development, and the updated requirements. The lecture will also review key recommendations to enable drained basements while preserving our city’s sewer capacity.
Register Now
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