Markham straddles the $1.5-million line almost exactly
Few GTA markets sit as close to the mortgage-insurance boundary as Markham does. The July 2026 average detached sale here was $1,507,841 — within a rounding error of the $1.5-million ceiling above which CMHC, Sagen and Canada Guaranty insurance is simply unavailable. The all-types average was $1,131,324, well below it. That means a Markham detached search is a search across a cliff edge: at $1,480,000 the tiered minimum down payment applies — 5% on the first $500,000 plus 10% on the balance, about $123,000 — while at $1,520,000 default insurance cannot be purchased at all and the minimum is a full 20%, roughly $304,000. A $40,000 difference in price can be a $180,000 difference in cash required at closing. Crossing the line also removes the 30-year amortization available on insured mortgages to first-time buyers and new-build purchasers, so the payment the stress test is applied against rises on the same loan. None of this is a reason to avoid Markham detached; it is a reason to decide in advance which side of the ceiling your budget is on, and to treat the ceiling — not your pre-approval amount — as the number that governs the negotiation. Unionville and Cathedraltown will more often sit above it; the Highway 7 condo corridor and the townhome stock sit clearly below.