The most useful line in Budget 2026 for small multiplex projects is not about Build Canada Homes. It is the mortgage insurance change for new triplexes and fourplexes.
Budget 2026 proposes, from Feb 1, 2027 (lender applications to insurers):
- Up to 90% of projected value on completion, for construction or purchase of a newly built 3- or 4-unit property.
- No property value cap. Today's insured limit is $1.5 million, which most Metro Vancouver fourplexes exceed.
- No owner-occupancy requirement.
- Up to 30-year amortization on the completed building.
What does not change: the borrower still qualifies on income (GDS 39%, TDS 44%) at the minimum qualification rate, needs a 600+ credit score, and the construction loan is underwritten by each insurer on its own criteria. The 90% is a ceiling; rents and income set the loan.
Practical takeaway for owners of an SSMUH lot: re-run the equity requirement on a fourplex before deciding between a duplex and a multiplex. The answer may have changed.
These are budget proposals. Confirm with your lender or mortgage broker that they are in force before relying on them.
Send the address and we’ll run a free desktop check of what it appears to allow, within two business days.
Request a lot check →Department of Finance Canada, "Mortgage Insurance Rule Changes to Support Missing Middle Housing" backgrounder (canada.ca, Nov 2026); Department of Finance, "The Boldest Mortgage Reforms in Decades" (Sept 2024) for the $1.5M insured-mortgage cap.
General information, checked Nov 9, 2026. Rules change and differ by municipality; confirm for your lot before relying on it. Not legal, tax or financial advice.