Canada’s residential construction sector is bracing for another wave of cost escalation as the tariff dispute between Canada and the United States intensifies. A new analysis from RESCON shows that the latest round of counter‑tariffs, implemented September 8, is compounding earlier trade measures and pushing material costs sharply higher for builders across Ontario.
RESCON’s modeling indicates that the new counter‑tariffs will add $9,000–$14,000 to a typical single‑detached home and $18,000–$28,000 to a mid‑rise unit—on top of the $15,000–$25,000 already embedded in project budgets from measures introduced in March 2025. The cumulative impact is now rippling through every major building input, from structural steel and rebar to wiring, vinyl products, radiators, cabinet hardware, carpets, and heat pumps.
“This should not, in any way, be construed as a criticism of the Canadian government’s decision to respond to the U.S. with counter‑tariffs,” said RESCON president Richard Lyall. “Faced with substantial U.S. tariffs, Canada had little choice but to act, as no sovereign nation can simply stand aside while key industries are targeted with punitive trade measures.”
At the same time, Lyall cautioned that “this is not a good situation for the homebuilding industry. Tariffs inflict damage on both economies. They are not prosperity measures and will make building homes more expensive in both Canada and the U.S.”
Economic modeling by the Association of Municipalities of Ontario and Oxford Economics reinforces the concern. Analysts estimate a $2.68‑billion GDP hit and 14,000 construction jobs lost in Ontario in 2026—even before Canada’s counter‑tariffs were introduced. Early projections suggest that 2027 housing starts could fall 8,000–12,000 units below current CMHC baselines if no remission measures are implemented.
The broader North American housing market is also exposed. The U.S. relies heavily on Canadian lumber and engineered wood, meaning tariff shocks reverberate through the entire supply chain. Lyall warns that builders cannot absorb these increases and will be forced to pass costs on to buyers and renters, worsening affordability on both sides of the border.
A separate Oxford Economics report for the Canadian American Business Council underscores the stakes: a breakdown of the USMCA could result in cumulative losses of US$1.4 trillion in the U.S. and C$523 billion in Canada, while an improved agreement could add hundreds of billions in GDP and support tens of thousands of jobs.
Lyall characterizes the current tariff escalation as “a problem where none existed,” arguing that punitive measures undermine what has long been considered one of the world’s most successful trading relationships. For the construction sector, the implications are clear: higher costs, slower project timelines, and deeper affordability challenges.
RESCON continues to advocate for policy solutions that stabilize supply chains and support housing delivery at a time when both countries face acute shortages.
