Financing a Triplex or Fourplex in Canada: Insured and Conventional Paths for Small Multi-Unit Investors

Who this is for

Residential investors and owner-occupiers targeting 3- or 4-unit properties in Canada, typically with stable employment income and seeking to use rental cash flow to offset carrying costs.

• The December 2024 CMHC cap increase to $1.5M applies to the purchase price, not the insured loan amount. A $1,499,000 fourplex with 10% down produces an insured loan of $1,349,100 — confirm the lender's internal policy aligns with the CMHC rule, as some lenders impose lower internal caps.
• Vacancy and management expense assumptions matter at underwriting. Most lenders apply a 5–10% vacancy factor against gross rents even if the units are currently tenanted. Presenting a rent roll with signed leases and a history of low vacancy strengthens the file.
• Existing tenants in Ontario and BC are protected by rent control and eviction restrictions that affect your ability to reposition rents post-purchase. A below-market rent roll reduces qualifying income and may affect appraisal value — factor this into offer price negotiations.
• If the property requires significant capital expenditure (roof, mechanical, electrical), lenders may condition approval on a holdback or require the work completed before funding. A pre-purchase inspection report is worth commissioning before submitting the mortgage application.
• Rental income from a multi-unit property is taxable. The after-tax cash flow picture — particularly in the first years when CCA and interest deductions are highest — differs materially from the gross yield. Model the after-tax return before committing to a purchase price.
• Sagen and Canada Guaranty are the two private mortgage insurers that compete with CMHC on insured multi-unit files. Their premium schedules and eligibility criteria are substantially similar to CMHC's but confirm with your broker whether a specific lender uses all three insurers or only CMHC.

• Assuming the 5%/10% sliding down payment scale applies to triplexes and fourplexes — it does not. The minimum is 10% on the full purchase price for insured 3-4 unit owner-occupied properties, and 20% for investor-only. Underestimating the down payment requirement delays closings and can void purchase agreements.
• Selecting a lender based on rate alone without confirming their rental income offset methodology. A lender offering 10 bps less but using the net T776 method instead of 50% gross offset can reduce qualifying income by $30,000–$50,000 annually on a three-unit rental, potentially failing the TDS test entirely.
• Failing to disclose owner-occupancy intent accurately. Purchasing as owner-occupied to access insured rates and then immediately vacating constitutes misrepresentation to the insurer — CMHC's fraud provisions allow recovery of the insurance claim and lenders can call the mortgage.
• Ignoring the CMHC premium capitalization in cash-flow modelling. A 3.10% premium on a $1,080,000 insured amount adds $33,480 to the mortgage balance and increases monthly carrying costs — this is not a sunk cost at closing but a financed obligation that accrues interest over the amortization.
• Applying to a single lender without broker comparison. The policy spread on multi-unit files — particularly on rental income treatment and maximum TDS — is wider than on single-family files. A broker with access to 15+ lenders will find a meaningfully better outcome than a direct bank application on most investor multi-unit files.

1. 01Confirm owner-occupancy status before structuring the financing — this single variable determines whether insured (10% down, prime rates) or conventional (20% down, wider lender set) applies, and the cost difference over a 5-year term is typically $40,000–$80,000 on a $1.2M property.
2. 02Obtain a current rent roll with signed leases and 12 months of bank-statement rental deposits before applying. This documentation package is the difference between a lender crediting market rents and crediting zero on vacant units.
3. 03Run the GDS/TDS calculation under both the 50%-of-gross and 80%-of-market-rent methods before selecting a lender. If the file passes under the 80% method but fails under 50%, target lenders who use the appraisal-based approach.
4. 04Commission a residential appraisal with a market rent schedule before submitting the mortgage application — not after. Lenders who use market rents require the appraisal as part of the underwriting package, and a low appraisal discovered post-offer can require renegotiation.
5. 05Budget for closing costs beyond the down payment: land transfer tax (double in Toronto), legal fees, title insurance, home inspection, and the CMHC premium if insured. On a $1.2M fourplex in Ontario, total closing costs outside the down payment typically run $55,000–$75,000.
6. 06Engage a broker with documented multi-unit transaction experience — not a generalist. Ask specifically how many 3-4 unit files they have closed in the past 12 months and which lenders they use for investor-only conventional fourplex files.