Fractional, Multi-Unit and Mixed-Use Property Financing (2026)
One to four units on one title is residential lending; five or more is commercial. Down payments, insured caps, and how lenders treat rental income each side.
The line is four units. One to four residential units on a single title is residential lending: insured mortgages with 5% down for owner-occupied two-unit, 10% for owner-occupied three- and four-unit, and 20% for non-owner-occupied, all up to the $1.5 million insured cap and stress-tested normally, with 50% to 80% of the rent counted. Five or more units is a commercial mortgage: CMHC-insured multi-unit programs at 15% to 25% down, or conventional at 25% to 35%, underwritten on the building's debt-service coverage rather than your personal ratios. Mixed-use (retail below, apartments above) is financed by lenders that accept it, usually at 25% to 35% down with the commercial share limiting the terms. Fractional ownership, a share of a vacation property, is rarely mortgageable at all.
Figures come from the CostToClose affordability calculator and rental cash flow calculator.
Where each structure falls
| Structure | Lending type | Minimum down | Rate | Qualification |
|---|---|---|---|---|
| 1–2 units, owner-occupied | Residential, insurable | 5% (first $500,000), 10% above | Standard | Personal ratios; 50–80% of rent counted |
| 3–4 units, owner-occupied | Residential, insurable | 10% | Standard | Same; some insurers use offset for 3–4 units |
| 1–4 units, not owner-occupied | Residential, conventional | 20% | Standard to +0.25% | Personal ratios; rent counted |
| 5+ units | Commercial / CMHC multi-unit (MLI Select) | 15–25% insured; 25–35% conventional | Commercial pricing; MLI Select can be lower | Debt service coverage ratio (DSCR) ≥ 1.1–1.2 on the building's NOI; personal net worth |
| Mixed-use | Commercial or specialty residential | 25–35% | Above residential | Blended: residential share on ratios, commercial on DSCR; some lenders decline if commercial > 30–50% of area |
| Fractional / co-ownership share of a vacation property | Usually none | Cash, or HELOC on your primary home | — | — |
Sources: CMHC (residential and MLI Select), Sagen, Canada Guaranty; OSFI B-20. Checked 14 September 2026. Insured multi-unit residential requires the property to be on one title with legal units.
Worked example from the calculator
Owner-occupied legal fourplex, $1,200,000, three units rented at $1,900 each, buyer income $130,000, 10% down, 4.49%:
| Item | Amount |
|---|---|
| Down payment (5% of $500,000 + 10% of $700,000 minimum $95,000; 10% chosen) | $120,000 |
| Mortgage before insurance | $1,080,000 |
| CMHC premium (3.10%) | $33,480 |
| Payment at 4.49%, 25 years | $6,157/mo |
| Stress-test payment at 6.49% | $7,452/mo |
| Rent, three units | $5,700/mo |
| Offset at 80% (insurer-permitted for 3–4 units) | −$4,560 |
| Net housing cost for GDS (with tax $900, heat $300) | $4,092 |
| Income needed at 39% | ≈ $126,000 — qualifies |
| Same purchase, add-back at 50% instead | Income needed ≈ $266,000 less $34,200 of added rent = declined |
The offset method is what makes owner-occupied fourplexes work for salaried buyers; ask each lender which they use.
The exact numbers above are worked out by hand for this specific fourplex. The affordability calculator now has both an add-back and an offset mode, though it solves for your maximum price rather than checking one specific price. At this buyer's income it tops out around $638,000 with no rent counted, about $784,000 with add-back at 50% (both short of $1,200,000), and roughly $1,227,000 with offset at 80%, just clearing it. Try it with the offset.
Five units and up
Underwriting shifts from you to the building. Lenders compute net operating income (rent less vacancy, tax, insurance, maintenance, management) and require it to cover the mortgage payment by 1.1 to 1.25 times. CMHC's MLI Select program offers insured financing to 95% loan-to-value and 50-year amortizations for buildings that score on affordability, energy efficiency and accessibility, the reason many investors target five-plus rather than four. Closing costs add an environmental Phase I ($2,000 to $4,000), a building condition report, and commercial legal fees.
Mixed-use
A building with a shop on the ground floor and two apartments above is usually 25% to 35% down with a lender that accepts mixed-use, at a rate above residential. Insurers will cover mixed-use only where the commercial portion is small (CMHC: non-residential area under a threshold and the residential units qualify). Vacancy of the commercial tenant is the risk lenders price.
Fractional ownership
A one-eighth share of a Muskoka cottage or a Whistler condo is a share in a corporation or a tenancy-in-common with a use schedule; Canadian lenders do not mortgage it. Buyers pay cash, borrow against their primary residence, or use the developer's own financing where offered.
Frequently asked questions
How many units can I buy with a residential mortgage in Canada?
Up to four on one title. Five or more is commercial lending.
Can I buy a fourplex with 10% down?
Yes, if you live in one unit, under an insured mortgage up to $1.5 million. Non-owner-occupied requires 20%.
How is a mixed-use property financed?
Through lenders that accept mixed-use, typically at 25% to 35% down and above-residential rates, with the commercial share limiting insurability.
Can you get a mortgage on fractional ownership?
Generally no. Fractional shares are bought with cash, a HELOC on another property, or developer financing.
What is MLI Select?
CMHC's insured multi-unit program for five or more units, offering higher loan-to-value and longer amortizations for buildings meeting affordability, energy or accessibility criteria.
Sources
- CMHC, residential mortgage loan insurance for 1–4 unit properties; MLI Select multi-unit program — checked 14 Sept 2026
- Sagen and Canada Guaranty, 3–4 unit owner-occupied programs — checked 14 Sept 2026
- Office of the Superintendent of Financial Institutions, Guideline B-20 — checked 14 Sept 2026
This guide is general information for Canadian home buyers and sellers, checked against the sources listed above on the date shown. It is not legal, tax, or mortgage advice. Rules and rates change; confirm current figures with your lawyer or notary, your lender, or the government office that administers the tax before relying on them.