Toronto Loses Population While CMHC Cuts Housing Forecast: What Tariff Pressure Means for Buyers Now

The annualized housing start number dropped below 220,000 units in CMHC's mid-2026 revision, more than 25% short of what the country needs to close the affordability gap by 2030. The federal housing agency isn't blaming zoning delays or NIMBY pushback this time. The culprit is tariffs, specifically, the threat of a 10% universal levy on construction imports, which economists estimate would add $15,000 to $25,000 to the cost of a new single-family home.

CMHC doesn't usually revise downward this sharply mid-cycle. When they do, it signals something structural has broken in the supply chain, not just sentiment. Steel, aluminum, specialized machinery for high-rise construction, all of it comes across the border, and all of it is now sitting on a pricing curve no one can model with confidence. Developers who spent 2023 and 2024 navigating labor shortages and material delays are now staring at a third variable they can't control: trade policy.

Toronto, meanwhile, is shrinking. Not dramatically. Between 0.5% and 1% across some core census tracts for the 2025-2026 period, per Statistics Canada. The city hasn't seen sustained population contraction in decades. This isn't about remote work anymore. It's about cost-of-living push. Young professionals who viewed the GTA as a stepping stone now see it as a trap. They're moving to Calgary, Halifax, Moncton, places where a household income of $120,000 still means something.

The supply squeeze no one is pricing yet

Here's the part most coverage misses. When tariffs inflate construction costs and developers delay projects, people don't stop needing housing. They shift into the rental market. Toronto's population might be stagnant or shrinking, but rental demand is climbing because the alternative, buying at current prices with a 5.4% renewal rate on a mortgage locked in at 1.79% three years ago, is unworkable for most households.

The city bifurcates. High earners stay. The middle class and essential workers leave. What's left is a labor gap in the service and infrastructure sectors and upward rent pressure despite fewer residents overall. That's not a paradox. It's a hollowing.

Larger developers hedge material costs years in advance, which means the tariff shock might not hit consumer pricing until 2027 or 2028. But smaller builders and infill projects, laneway houses, basement conversions, the secondary suites that CMHC's start data doesn't fully capture, operate on thinner margins. They get squeezed first. The irony is that these are the projects adding density without the municipal delays that bog down tower construction. Tariffs kill them disproportionately.

What this means if you're rate-shopping now

Fixed mortgage rates are sitting in the 4.3% to 4.6% range as of mid-2026. Variables are higher, often above 5.7%. The yield curve remains inverted, meaning the market expects long-term rates to stay subdued even as short-term debt costs more. That makes fixed the rational choice for anyone trying to qualify under the stress test.

But rational and sufficient are different. A household that could qualify at 4.5% a year ago is facing tighter lending standards and higher absolute dollar costs on the same property. The buffer has compressed. If tariffs push new-build prices higher and existing inventory stays flat, the "wait for a correction" strategy depends entirely on macro conditions no one can forecast with precision, trade policy chief among them.

Toronto's population decline should, in theory, ease price pressure. Supply and demand. Except supply isn't responding to local demand anymore. It's responding to global input costs and federal trade posture. CMHC revised its forecast because the variables shifted. Buyers are discovering the same thing the hard way.