Turn One House Into 2–4 Legal Rental Units
Ontario’s housing rules changed — and single-family homes across the GTA are now convertible into multiple legal rental units. We handle the whole conversion: feasibility, design, permits and construction, under one fixed-price contract.
The Rules, Plainly Stated
- Province-wide: Ontario’s Bill 23 (2022) permits up to three residential units on most residential lots — for example, the main house plus two additional units — as-of-right, subject to building and fire code.
- Toronto: the city went further, permitting multiplexes of up to four units citywide in residential zones.
- Code still applies. Fire separations, egress, sound transmission, ceiling heights and servicing all have to meet the Ontario Building Code. Legal units are safe units — and safe units are financeable and insurable.
Rules evolve. Municipal zoning and provincial policy change. We verify the current rules for your specific property during feasibility — before you buy or commit to design.
What a Conversion Involves
- Feasibility. We assess the structure, ceiling heights, servicing capacity, parking and zoning — and tell you how many legal units the property realistically supports.
- Design. Unit layouts that maximize rentable space while meeting code: separate entrances, fire separations, sound control, and independent HVAC where required.
- Permits. Building permits and any Committee of Adjustment or zoning approvals. We manage the submissions.
- Construction. Structural work, separations, new kitchens and baths, services and metering — on a fixed-price contract.
- Lease-ready. Each unit delivered ready to list, with the documentation your insurer and lender expect.
Why Investors Convert Instead of Building New
- Keep the structure. The foundation, framing and roof already exist — conversion typically costs far less per unit than new construction.
- One roof, multiple rents. A bungalow renting for $3,000/month as a single unit can become two or three units producing substantially more combined.
- Faster to income. Conversions generally permit and build faster than ground-up multi-unit construction.
- Proven stock. Post-war bungalows and two-storeys across the corridor — Whitby, Ajax, Scarborough, older pockets of York Region — convert particularly well.
Multiplex FAQs
In most of Ontario, up to three units per residential lot under Bill 23. In Toronto, up to four units citywide in residential zones. The building’s structure, servicing and lot may support fewer — feasibility tells you the real number for your property.
Usually not for 2–3 units under the as-of-right rules, and not for up to 4 units in Toronto’s residential zones. You still need building permits and full code compliance. If your plans exceed the as-of-right permissions, we’ll tell you what approvals are required.
Yes. Many conversions are owner-occupied: live in one unit, rent the others, and let the rental income carry the mortgage. We plan the construction phasing so you can stay in the home where possible.
Related Services
How Many Units Does Your Property Support?
Free feasibility review: we look at the structure, zoning and servicing and tell you the realistic unit count — and what it costs to get there. Call (647) 482-5247.