How Much Can You Actually Borrow on a Multi-Unit Rental?

First, sort out which track you're on

The dividing line is the unit count in this one building — self-contained units, each with its own kitchen, bathroom and entrance. One to four units, and it's residential financing. Five or more, and it's commercial.

The easiest thing to get wrong: treating "how many units in this building" and "how many properties you own in total" as the same question. They are not. Classification looks only at this one building, not at anything else in your name. Eight separate single-family rental houses, each with one unit, all finance as residential. One six-unit apartment building — still just one property — finances as commercial.

How many more properties you can finance in total, and where lenders start tightening, is a different question that has nothing to do with how this one building is classified. That's covered on Rental and Investment Property Mortgages.

On the residential track, what can you borrow

One to four units means the lender is looking at your income, your credit and your debt ratios, not the building's own numbers. A non-owner-occupied rental generally needs at least twenty percent down, and rent counts toward your income at a rate that varies by lender, generally somewhere between fifty and one hundred percent.

If you live in one unit and rent the rest, the treatment moves much closer to a home, and the down payment requirement is generally quite a bit lower — say so clearly before you apply.

Full mechanics for this track — how rent is counted, where lenders start saying no, and when to change the structure instead of the lender — are on Rental and Investment Property Mortgages.

On the commercial track, what can you borrow

Five units or more, and the lender is looking at what the building itself collects in a year — net operating income (NOI) — and whether that covers the annual debt payments (DSCR). Not your pay stub.

Down payment is not a fixed percentage. It falls out of the asset type, the location, the lease quality and the DSCR together. Multi-unit residential typically supports the highest leverage in commercial lending, and qualifying projects can also access CMHC insured products such as MLI Select — higher leverage and longer amortization, in exchange for a longer process and more conditions.

Full mechanics for this track — how NOI and DSCR are calculated, what changes when the property sits in a corporation, what documents are needed — are on Commercial Mortgages, with a page specifically on multi-family properties.

Get the unit count wrong, and the borrowing amount is wrong too

Filing on the wrong track costs more than an inconvenience. Submit a genuinely 5-unit building through the residential process and it usually gets bounced back into the commercial process during appraisal or underwriting. Push a 4-unit building into a commercial conversation and you typically end up with worse terms than you'd have gotten — multi-unit residential already gets some of the best terms available on the residential side.

Confirm the legal unit count before you buy — the count on record with the municipality, not what the seller says or what the listing describes. Zoning and property records can confirm it; check that against what you're being told.

Common questions