Investing in Duplexes, Triplexes, and Fourplexes

Multi-unit residential properties offer a way to generate rental income while potentially building equity in a single asset. For many Canadian investors, these properties strike a balance between the simplicity of a single-family rental and the complexity of larger apartment buildings.

What Counts as a Multi-Unit Property

A duplex has two separate living units, a triplex has three, and a fourplex has four. These are generally classified as residential properties under five units, which matters because it affects how lenders assess financing and what mortgage insurance options may be available.

Properties with five or more units are typically treated as commercial real estate, with different lending criteria, longer amortization limits, and often a requirement to work with commercial lenders rather than traditional residential mortgage products. This is one reason many investors start with two to four units before considering larger buildings.

Financing Considerations for Small Multi-Unit Properties

Lenders generally look at multi-unit properties somewhat differently than single-family homes, since a portion of the purchase may be supported by projected or existing rental income. If you plan to live in one unit and rent out the others, you may qualify for owner-occupied financing terms, which can come with lower down payment requirements compared to a pure investment purchase.

For example, an owner-occupied duplex or triplex purchase might be considered with a down payment in the range of 5 to 10 percent depending on the property and lender, while a non-owner-occupied multi-unit purchase could require a larger down payment, often 20 percent or more. These figures are illustrative only, as actual requirements depend on the lender, property type, location, and your overall financial profile.

Mortgage default insurance rules and rental income offset calculations also vary depending on whether you occupy the property. A mortgage broker can help clarify which lenders are comfortable with multi-unit applications and how rental income from the other units might be factored into your qualification, since this process is often more involved than a standard single-family purchase.

Owner-Occupied vs Pure Investment Strategies

Many Canadians enter multi-unit investing through what is sometimes called house hacking: buying a duplex or triplex, living in one unit, and renting out the rest. This approach can reduce your own housing costs while you build equity, and it may open the door to more favourable financing terms than a pure rental purchase would.

A pure investment approach, where you don't live in any unit, shifts the focus entirely to cash flow and long-term appreciation. This path typically requires a larger down payment and a more conservative lender assessment of your ability to carry the property, since there's no owner-occupancy component to soften the underwriting.

Each strategy comes with different tax implications as well. Owner-occupied multi-unit properties involve dividing expenses between personal and rental use, while fully rented properties allow for different expense deduction treatment. A tax professional familiar with rental property rules can help you understand how your specific situation might be affected.

Practical Factors to Weigh Before Buying

Multi-unit properties often come with older building systems, since much of the existing stock in Canadian cities was built decades ago. A thorough inspection matters more here than with a typical single-family home, since you're potentially dealing with multiple roofs, multiple sets of plumbing and electrical, and shared structural elements that affect every unit at once.

Municipal zoning and licensing requirements also vary significantly by city and province. Some municipalities require rental licensing for properties with a certain number of units, and fire code requirements can differ for triplexes and fourplexes compared to duplexes. It's worth checking local bylaws before assuming a property's current configuration is fully compliant, since unpermitted unit additions are not uncommon in older multi-unit buildings.

Vacancy risk is another consideration. With a single-family rental, an empty unit means zero rental income. With a fourplex, one vacant unit still leaves three contributing to your cash flow, which can make multi-unit properties somewhat more resilient to short-term vacancy compared to single-tenant rentals.

Key Takeaways

• Duplexes, triplexes, and fourplexes are generally treated as residential properties for financing purposes, unlike buildings with five or more units
• Owner-occupied multi-unit purchases may qualify for different down payment terms than pure investment purchases, depending on the lender
• Older multi-unit buildings often require closer inspection of shared systems like roofing, plumbing, and electrical
• Municipal zoning, licensing, and fire code rules for multi-unit properties vary by city and should be confirmed before purchase
• Multiple units can help reduce the impact of a single vacancy compared to a single-family rental

Disclaimer: This article is for informational purposes only and does not constitute financial, legal, or mortgage advice. Any numbers, rates, or scenarios mentioned are examples only and may not reflect current market conditions. Always consult a licensed mortgage professional or financial advisor for guidance specific to your situation.