Published 18 September 2026 · By Jatin Dua, Broker of Record, RE/MAX Quantum Realty
Two to four unit properties are financed residentially. Owner-occupied purchases can use insured financing with less than 20% down, while pure investments usually need 20% or more, and lenders count only part of the rental income. The bigger risk is whether the extra units are legal.
Small multi-unit houses are the middle ground between a single-family home and an apartment building: you can live in one unit, rent the rest, and still buy with residential financing.
Financing rules that shape the deal
- Two to four units are financed as residential property. Five or more is commercial, with different rules and rates.
- Down payment. Owner-occupied properties of two to four units can be bought with less than 20% down under insured mortgage rules; if you won’t live there, expect at least 20%, often more.
- The $1.5 million cap on insured mortgages applies here too.
- Rental income helps you qualify, but lenders count only a portion of it, and each lender treats it differently.
- The stress test still applies: your contract rate plus 2%, or 5.25%, whichever is higher.
Legal, non-conforming or illegal?
This is where buyers get hurt. A three-unit house may be fully legal, may be a legal non-conforming use from before the by-law changed, or may be an unpermitted conversion. Ask for permits, check the zoning, and have your lawyer look at what the seller can actually confirm. Fire code compliance matters as much as zoning: separations, alarms and exits are where retrofits get expensive.
Toronto now permits up to four units on residential lots city-wide, which makes legalising an existing extra unit more realistic than it was, though it still takes permits and money.
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Buying with tenants in place
- You inherit the leases and the rents. Existing tenants keep their rights and their current rent.
- You cannot raise rent beyond the guideline for units covered by it, regardless of what the seller was charging.
- Moving in yourself requires proper notice, compensation and a genuine intention to occupy. Personal-use notices are heavily scrutinised.
Costs owners forget
Vacancy, turnover and repainting, higher insurance for a multi-unit, water and heat if not separately metered, maintenance on two or three of everything, accounting, and the capital items: roof, furnace, windows, knob-and-tube replacement.
The takeaway
Confirm legality and fire code compliance before conditions expire, and budget for vacancy, turnover and two or three of every capital item.
Talk it through with me
Get a first-time buyer plan
Tell me your savings, income range and target area. I will send a realistic price range and next steps.
I will come back to you personally, usually the same day. If it is urgent, call or text 833-330-1925.
Frequently asked questions
How much down payment do I need for a duplex in Toronto?
If you will live in one unit, insured financing can allow less than 20%; if it is purely an investment, expect 20% or more.
Does rental income help me qualify?
Yes, but lenders use only part of it and the rules differ by lender.
How do I know if the units are legal?
Ask for permits, confirm zoning, and get your lawyer and a qualified inspector involved before your conditions expire.
Can I move into a unit and remove the tenant?
Only through the proper process, with notice and compensation, and only for genuine personal use.
Sources
- Financial Consumer Agency of Canada — down payment — down payment and insured mortgage rules
- City of Toronto — multiplex permissions and permits
Related reading
- Property Manager vs Self-Managing a Toronto Rental: Costs and Trade-Offs
- Landlord Insurance in Ontario: Coverage, Gaps and What It Costs You to Skip
- What Can I Build on My Lot? Free Toronto Lot Report
About the author — Jatin Dua, Toronto and GTA real estate broker
I am Jatin Dua, Broker of Record and co-founder of RE/MAX Quantum Realty Inc., Brokerage, Unit 101, 799 The Queensway, Etobicoke. I work with buyers and sellers across Toronto and the GTA, with deep local knowledge of the west end. Four-plus years of active GTA transactions and over $100 million in sales volume. Every market figure here comes from TRREB’s published tables and every rule from RECO or Ontario legislation, so you can check all of it without asking me.
Reach me at connect@jatindua.com or 833-330-1925, or book a call.