New insurance rules for the missing middle: what they change for a fourplex.

November 2026 · Jacob Sofer · 5 minute read

On November 5 the Department of Finance published the terms for two new kinds of insured mortgage for small rental buildings. One lets private mortgage insurers, not only CMHC, insure buildings of five to fifty units. The other makes new three- and four-unit housing insurable without the owner living in it. Both apply to applications lenders submit from February 1, 2027.

Five to fifty units, from more than one insurer

The government first said it would open multi-unit insurance to private insurers in the Spring Economic Update 2026. The published terms are:

• Up to 90% of property value for new construction, and 85% for purchases, refinancings and renewals.
• Amortisation of up to 50 years for new construction, and 40 years otherwise.
• A minimum debt coverage ratio, meaning net operating income divided by total debt service, of 1.15 on a five-year term or 1.10 on a ten-year term.
• A borrower net worth of at least 25% of the loan, and never less than $100,000, counting only assets held in Canada.
• No maximum property value and no owner-occupancy requirement.

The building has to hold its five to fifty self-contained homes under a single legal title or ownership structure. Separately titled properties cannot be combined to reach the count. For construction loans the amortisation and coverage limits do not apply, and each insurer underwrites with its own criteria.

New three- and four-unit housing

The second product insures the construction or purchase of a newly built three- or four-unit building, again with no owner-occupancy requirement and no maximum value. Its terms read more like a home mortgage than a commercial loan:

• Up to 90% of the building's projected value on completion.
• Amortisation of up to 30 years.
• A gross debt service ratio of no more than 39% and a total debt service ratio of no more than 44%, tested at the minimum qualifying rate.
• At least one borrower or guarantor with a credit score of 600 or higher.

Construction loans are again exempt from the amortisation and debt-service limits.

Where a fourplex with a garden suite fits

The single-title rule matters most to us. A fourplex with a garden suite behind it, on one lot and one title, is five homes, so it falls in the five-to-fifty category. That is the same threshold that brings it into CMHC's MLI Select, which we described in an earlier piece. Two neighbouring lots cannot be paired to qualify, which keeps the product aimed at buildings rather than assemblies.

A fourplex without a garden suite, which is the default on many Toronto lots, now has an insured route of its own for the first time. That route sizes the loan on the borrower's debt-service ratios and credit rather than on the building's income, so it suits individual owners and their guarantors best. An ownership partnership whose ability to pay comes from the building's rents may find the five-unit product, or MLI Select, the more natural fit.

How it compares with MLI Select

MLI Select is still the richer program at its top tier: up to 95% loan-to-cost, up to 50 years' amortisation and reduced premiums. In exchange, the building must earn points for affordability, energy efficiency and accessibility. The new five-to-fifty terms stop at 90% for new construction. The parameters Finance published include no comparable scoring.

The bigger change may be competition. Until now multi-unit insurance has been CMHC's alone. A second and third insurer, once they choose to offer the product, gives owners and lenders another place to go on pricing, process and turnaround. For buildings this size, turnaround has often mattered as much as terms.

What it does not settle

• Premiums. The announcement does not set insurance premiums, and nothing yet says what private insurers will charge.
• Appetite. The rules permit the products; they do not require any insurer or lender to offer them.
• Valuation. The caps are set against property value, not cost. The announcement does not say how insurers will measure value for a building that is still under construction, and that will decide how far 90% really reaches.
• The net worth test. Twenty-five per cent of the loan, in Canadian assets, is a real hurdle for a single-building owner. How guarantors and sponsors count toward it will be set out in each insurer's underwriting.

None of this takes effect until February 2027. When it does, each building we underwrite can be tested against more than one insured route, and the right one chosen building by building. That is a better position than the missing middle has been in for a long time.