Windsor posted one of Ontario's strongest 2024 construction-employment gains, and it holds a Notice of Project threshold no other city in this cluster has a reason to use: a higher dollar figure that applies specifically inside an automobile plant. Both are stated here on their own real terms, without a manufactured cross-border trade number to go with them.
Market signals
BuildForce Canada's 2024 construction sector review names Windsor alongside Kitchener-Cambridge-Waterloo and Brantford as the Ontario regions that “led the way” in 2024 construction-employment growth, up 18.3%, “buoyed by public infrastructure and manufacturing investments.” That is a real, city-level, dated figure that ran against Ontario's own provincial direction that year: the province as a whole fell 4.4% in 2024, and a further 2.4% (a loss of 13,400 workers) for the 12 months to February 2026. Windsor's own number and Ontario's provincial numbers move in different directions across different periods; none should stand in for another.
Ontario's standard Notice of Project trigger, under O. Reg. 213/91 s. 6, is $50,000 in expected labour-and-materials cost, per Ontario's file-a-work-notice guidance, citing O. Reg. 213/91 s. 6. The same regulation carves out a specific, higher threshold of $250,000 for a project “confined to a factory that manufactures or assembles automobiles” — a rule that exists nowhere else in this cluster's material because it is written for exactly the kind of facility Windsor's own economy is built around. A contractor working inside a Windsor-area assembly plant should confirm which threshold actually applies to their scope before assuming the standard $50,000 figure holds.
Nothing about proximity to the Windsor-Detroit border changes Ontario's Construction Act: the same 10% holdback and the same annual-release rule that became mandatory on 1 January 2026 apply here as anywhere else in the province — see the Ontario payment and safety page for that mechanism in full, and the Toronto page for the standard $50,000 Notice of Project figure this page's own $250,000 exception sits alongside.
No reachable source this session carries a Windsor-specific cross-border freight volume, customs-delay figure, or binational infrastructure project cost. Federally-connected construction tendering in Windsor, as anywhere else in Canada, runs through the same CanadaBuys portal and the same Government Contracts Regulations s. 6 sole-source ceilings described on the Ottawa page; this page states that mechanism rather than a Windsor-specific dollar figure it could not verify.
Yes. Ontario's standard threshold is $50,000 in expected labour-and-materials cost, but O. Reg. 213/91 s. 6 sets it at $250,000 specifically for a project confined to a factory that manufactures or assembles automobiles.
Against it. Windsor's own employment rose 18.3% in 2024 while Ontario's provincial figure fell 4.4% that year and a further 2.4% by February 2026 — a real, city-level divergence from the provincial trend.
A 30-minute call is enough to see where AI flags the $250,000 auto-plant threshold before it's missed.
