Start Here | How It Works
How a Toronto Fourplex Actually Gets Built
The headline change in Toronto is simple: since the multiplex by-law of May 2023, up to four units are a permitted use on residential lots across the city. That means no rezoning, no Official Plan amendment, and no public meeting for a compliant build — you go to a building permit. Here is the path, and the gates that decide whether your lot qualifies.
Key Takeaways
- ✓Up to four units as-of-right in residential Neighbourhoods zones, city-wide.
- ✓No rezoning, no public meeting for a compliant multiplex — it is a building-permit process.
- ✓Six units only in the nine sixplex wards (or a ward that opts in).
- ✓A design that exceeds the envelope needs a Committee of Adjustment minor variance.
The four-unit permission is city-wide, but the number that actually fits depends on the zone, the lot area and the ward. Check the ceiling on one address and PlexCheck reads all three from City data.
The Four Steps
Confirm the lot is in a residential Neighbourhoods zone
The multiplex permissions apply to residential zones (RD, RS, RT, RM) on lands the Official Plan designates Neighbourhoods. That covers most of Toronto's residential lots. This is a lookup, not an application.
Decide the form: up to four units, or six in a qualifying ward
Four units are permitted as-of-right anywhere. Six units are permitted only in the nine sixplex wards, or in a ward whose councillor has opted in. Your ward sets the ceiling.
Fit the design to the as-of-right envelope
Height, lot coverage, and setbacks still apply. A design that stays inside them goes straight to a building permit. A design that exceeds them needs a Committee of Adjustment minor variance first.
Apply for a building permit
Because the use is permitted, there is no rezoning, no Official Plan amendment, and no public meeting for a compliant multiplex. You apply for a building permit and build.
Best For
- ✓ Residential Neighbourhoods lots where a fourplex fits the as-of-right envelope.
- ✓ Lots in one of the nine sixplex wards aiming for five or six units.
- ✓ Owners who want to skip rezoning and the public meeting entirely.
Usually Fails When
- ✕ A sixplex is assumed on a lot outside the nine wards (and the ward has not opted in).
- ✕ The design exceeds height, coverage, or setbacks and the variance timeline was not planned.
- ✕ A heritage conservation district adds review that was not scoped.
What To Verify Before Spending Money
- → The residential zone and Neighbourhoods designation for the parcel.
- → Which ward the lot is in, and its sixplex status.
- → Whether the design fits the as-of-right envelope or needs a variance.
Where to Go Next
Frequently Asked Questions
How does building a multiplex in Toronto actually work?
Do I need a rezoning or a public meeting for a fourplex?
What is the difference between a fourplex and a sixplex here?
What pushes a project out of the building-permit stream?
Where does the provincial Bill 23 fit in?
Official Sources Referenced
Related reading
Longer pieces on the same question.
The four-unit permission read against a real lot, and where it stops.
Where the province floor ends and the City rules take over.
Which nine wards allow six units, and how to check your own address.
See the as-of-right ceiling for one specific lot
Four units city-wide is the rule. The number your lot can actually hold depends on its zone, its area and its ward. PlexCheck reads all three from City data.
Free. City-stamped zoning and CMHC survey rents. Takes about 30 seconds.
Building in Toronto, not just modelling it
PlexCheck models any Toronto lot today. VanPlex does not yet build in Toronto or work with Toronto trades and lenders. Join the list and we will tell you when that changes.