Multiplex lot checker: what can you build on your Toronto lot?
Type your address and see in seconds whether your property can hold a fourplex or sixplex, and whether it may sit on a major street. Free, with no sign-up.
Check your address
Enter a City of Toronto address to see whether it's fourplex-eligible, inside a sixplex ward, and whether it may qualify for more under EHON's Major Streets program.
What the checker tells you
Fourplex as-of-right
Whether your address is inside the City of Toronto, where up to four units are permitted on most residential lots without rezoning.
Sixplex ward
Whether you are in one of the nine wards where five and six units are permitted as-of-right in a detached building.
Major street potential
Whether your lot likely fronts a major street, which can open the door to larger small-scale apartment buildings.
What the checker can’t tell you
Location is the first screen, not the whole answer. How many good units actually fit on your lot depends on things an address can’t show: frontage and depth, your base zone’s height, setback and coverage standards, protected trees, servicing capacity, basement height and overlays. That is what a feasibility review works through for your exact property, along with the costs and the rental cashflow.
Book a free feasibility callHow many units can a Toronto lot hold?
As-of-right under the citywide multiplex permissions — no rezoning. A building permit and compliance with your base zone’s standards are still required.
Where the lot qualifies (access, depth, trees), an ancillary suite can be added on top of a multiplex — e.g. fourplex + garden suite = 5 rental units.
As-of-right in detached buildings under the 2025 sixplex permissions. Note: current rules restrict combining 5–6 unit buildings with an additional garden/laneway suite — a commonly misunderstood detail we confirm per lot.
Requires a planning application — minor variance(s) at the Committee of Adjustment or a rezoning, depending on what you’re asking for. Feasible on the right site, but a different process and timeline.
The full rules, the list of sixplex wards and a plain-English glossary are in the Toronto multiplex guide.
Common questions
How do I find out what I can build on my lot in Toronto?
Enter your address in the checker above. It tells you whether the property is inside the City of Toronto (where up to four units are permitted as-of-right on most residential lots), whether it falls in one of the nine wards where five and six units are permitted, and whether it likely fronts a major street, which can unlock additional permissions. The next step is a lot-specific review of your base zone’s standards and site conditions.
Is the lot checker free?
Yes. The address check is free and instant with no sign-up. If you want a detailed written report for your property afterwards, you can request it with your name and email.
What does “as-of-right” mean?
It means the use is already permitted by the zoning, so you do not need a rezoning or a Council decision. You still need a building permit, and your design must comply with the standards of your base zone, such as height, setbacks and coverage.
What is a sixplex ward?
Since June 2025, Toronto permits five- and six-unit detached buildings as-of-right in nine designated wards. The checker tells you whether your address is in one of them. The full list is in our Toronto multiplex guide.
Does the checker work outside Toronto?
The checker is built around the City of Toronto’s rules. Other GTA municipalities, including Mississauga, Brampton, Vaughan and Markham, have their own frameworks for additional units. We review lots in those cities as part of the free feasibility review.
Is the result a guarantee that I can build?
No. The checker is a first screen based on location. How many good units actually fit depends on your lot’s dimensions, your base zone’s standards, protected trees, servicing and other site conditions, and the rules change over time. A feasibility review confirms what your exact lot supports.