Multiplex Investing
in Toronto

A multiplex is a residential property containing two to four self-contained dwelling units under one roof. In Toronto, they range from century-old semis divided into two flats decades ago to purpose-built fourplexes in established inner-city neighbourhoods. Each unit has its own entrance, kitchen, and living space. One owner holds the entire property on a single title.

The appeal is straightforward: one purchase, one property to insure and maintain, multiple streams of rental income. For investors who live in one of the units, that rental income can offset a significant portion of the monthly mortgage. For pure investors, two to four rent-generating units under one roof simplify management compared to owning properties scattered across different addresses.

At five or more units, a property moves into commercial and specialty financing territory, including CMHC programs such as MLI Select, which have different eligibility rules and financing structures. Everything in this guide applies specifically to the two-to-four unit residential range.

How you finance a multiplex in Toronto depends almost entirely on one question: are you going to live in one of the units? The answer changes your down payment requirements, your access to CMHC mortgage insurance, and how lenders treat your rental income.

If you plan to owner-occupy, CMHC insured financing is available for 2-4 unit properties. A duplex requires as little as 5% down (blended with 10% on the portion above $500,000), subject to current insured mortgage rules. A triplex or fourplex requires a minimum of 10% down. The purchase price must be under $1.5 million to qualify for insured financing. Rental income from the non-owner-occupied units can typically be included in your mortgage qualification, increasing your effective borrowing capacity.

If you're buying as a pure investor without occupying any unit, high-ratio (low-down-payment) CMHC insurance is not available. You'll need at least a 20% down payment: CMHC's income-property insurance for non-owner-occupied 2-4 unit rentals can apply at up to 80% loan-to-value (so at least 20% down), generally for properties under about $1 million and on a 25-year amortization; above that price, or otherwise, you're in conventional territory. Lenders will still consider rental income for qualification, but how much of it counts varies. A mortgage broker with multi-unit experience is worth engaging early in your search. Use the mortgage calculators for a starting estimate, then get a qualified number from a broker.

House hacking means buying a multi-unit property, occupying one unit as your primary residence, and renting the others to offset your mortgage costs. In Toronto, where the gap between what ownership costs and what renting costs has narrowed significantly, it's one of the most financially effective strategies available to buyers who want to own rather than rent.

In the scenario above, an owner occupying one unit of a $1.2 million triplex has a mortgage payment of about $6,320 a month, roughly $1,900 of which is left after the two rental units' gross rent, before property tax, insurance, utilities, repairs, vacancy, and other ownership costs. Those costs are real and need to be budgeted, but the rental offset still brings the effective cost of owning much closer to what many would pay to rent, and, unlike renting, the owner is building equity and is exposed to any change in the property's value over time.

Ontario's Residential Tenancies Act generally applies to tenants occupying self-contained units, even when the landlord lives elsewhere in the building. Certain arrangements, such as occupants sharing a kitchen or bathroom with the owner, may be exempt. Rent-increase rules also depend on whether the unit is subject to Ontario's annual guideline, so get legal advice about the specific tenancy. Understanding the RTA before you buy is part of the due diligence process, not an afterthought.

Multiplexes require more thorough due diligence than a standard single-family home. The most important question is whether each unit is legally permitted. In Toronto, legality depends on more than zoning alone: you need to verify building permits, occupancy status where applicable, and whether any outstanding work orders exist. A property listed as a triplex might legally only be permitted as a duplex, which affects your ability to rent it as marketed and creates liability if a tenant is harmed in a non-compliant unit.

Toronto has a large stock of homes with converted suites that were never properly permitted. The conversion might look professional and be genuinely livable, but without permits the legality is unclear and a lender may refuse to finance against it. Verify permit status independently, not just from what the listing claims.

Toronto's multiplex inventory is concentrated in older inner-city neighbourhoods where large detached and semi-detached homes were converted over decades of population growth. These areas often contain substantial older housing stock and recurring duplex and triplex listing activity, along with strong rental demand and the transit access tenants increasingly prioritize, though every property's legal status must be verified independently.

Entry price varies significantly by area, so the right neighbourhood depends on your budget, whether you plan to owner-occupy, and the tenant profile you're targeting. Below are areas where buyers commonly encounter multiplex inventory, based on local housing stock and typical listing activity rather than a formal dataset.