A detached house on Fairview Avenue came to market in High Park North this spring with a line most buyers don't expect to see on a century home listing: currently configured as three self-contained units, on a 30 by 120 foot lot, with room to convert back to a single family residence if a buyer wanted that instead. The listing framed it as a bonus, an unusual find. It isn't unusual. It's what the zoning already allows on almost every residential lot in the neighbourhood. The house on Fairview just happens to already use the permission that its neighbours are quietly sitting on.
That gap between what a lot is legally entitled to hold and what the listing photos show is the thing a median sale price can't tell you. And in a neighbourhood where the average detached home is now changing hands for something in the range of $1.5 million, that gap is worth understanding before you write an offer, not after.
What actually changed, and when
Toronto's multiplex rules arrived in two separate steps, and conflating them is where most confusion starts.
The first step was citywide. On May 10, 2023, City Council adopted zoning amendments permitting up to four residential units as-of-right on virtually every lot zoned for houses across Toronto, the R, RD, RS, RT, and RM zones that make up most of the city's low-rise neighbourhoods. No rezoning application, no minor variance, no committee hearing. If a fourplex fits inside the same setback, height, and coverage rules that already govern a detached house, you go straight to a building permit. Parking hasn't been required for any of it since February 2022, when Council eliminated minimum parking requirements citywide.
The second step was narrower and came later. On June 25 and 26, 2025, Council adopted a further amendment (Official Plan Amendment 818 and Zoning By-law 654-2025) allowing up to six units and four storeys in a detached building, as-of-right, but only in nine of Toronto's twenty-five wards. Eight of those wards sit inside the old City of Toronto and East York, the areas with the narrow, deep lots and the existing streetcar and subway density that made a six-unit form feel unremarkable rather than out of place. High Park North sits inside one of them: Ward 4, Parkdale-High Park, the same ward that covers Swansea, Roncesvalles, Parkdale, and The Junction.
That's the part worth sitting with. This isn't a High Park North advantage over its neighbours. It's ward-wide. A buyer choosing between a house in High Park North and a comparable one in Roncesvalles isn't choosing between different zoning rights. Both carry the same six-unit permission. What differs, lot by lot, is whether the physical shape of the property can actually use it.
| Fourplex | Sixplex | |
|---|---|---|
| Units allowed | Up to 4 | Up to 6 |
| Where | Citywide, all residential Neighbourhoods zones | Nine wards only, including Ward 4 |
| Height | Standard zone cap, roughly 3 storeys | Up to 4 storeys |
| In effect since | May 2023 | June 2025 |
| Parking required | None | None |
| Rezoning needed | No, if within envelope | No, if within envelope |
The variable that isn't in the price
Council didn't hand every lot in Ward 4 a bigger building envelope than a house would already get. Setbacks are the same. Lot coverage, typically capped between 30 and 50 percent depending on the zone, is the same. Height still tops out around 10 to 12 metres for most fourplex forms, stretching to four storeys only where the sixplex permission applies. The zoning removed the approval process. It didn't remove the math of fitting six self-contained homes, six kitchens, six sets of stairs and exits, into a footprint that a single detached house already occupies.
That's why the Fairview Avenue example is useful as more than a curiosity. A 30 foot frontage on a 120 foot lot gives you meaningfully more room to stack fire separations, distribute plumbing stacks, and carve out the outdoor amenity space a multiplex conversion needs than a 20 or 22 foot lot two doors down. The zoning right is identical on both properties. The physical envelope isn't. One can plausibly become the four or six unit building the by-law permits. The other, on paper, has the same legal right and a much harder time using it.
The zoning stopped asking permission a while ago. What's left to figure out is whether your specific lot can actually say yes.
What the average price is quietly averaging over
As of this summer, the average sale price across all High Park North property types sits close to $1.3 million, and detached houses specifically are trading closer to $1.54 million, with homes typically moving in under three weeks. Roughly four in ten sales are closing above asking. None of that headline number tells you whether the house you're bidding on is a straightforward single family home, a legally configured three-unit income property like the one on Fairview, or a lot with the frontage and depth to become a fourplex or sixplex if a future owner wanted that.
Two houses can list at the same price with none of that difference visible until someone pulls the survey. That's the real friction point for a buyer in this market. It isn't that density optionality is a secret. It's that nobody prices it into the number you see first, and in a market moving this fast, there usually isn't time to figure it out after you've already fallen in love with the kitchen.
Two questions worth asking before you tour
What's the actual frontage and depth, not just the square footage. A listing sheet often leads with total square footage or lot size in a single combined figure. Ask for the frontage and depth separately. A 25 by 150 lot and a 40 by 90 lot can carry the same total area and behave completely differently under a coverage and setback calculation.
Is any existing multi-unit configuration legal, or just tenanted. A house advertised as having a basement apartment or a top-floor suite isn't automatically the same thing as a permitted multiplex. Ask whether the units were built and inspected under a permit, or whether they predate the current rules and were never formally registered. That answer changes what you can rely on and what you'd need to redo.
The plain version
Every residential lot in High Park North already has the legal right to become a fourplex, and because the neighbourhood sits inside Ward 4, the right to go further to six units where the lot allows it. That permission doesn't show up in the average sale price, and it doesn't distinguish itself from ordinary square footage on a listing sheet. It shows up in frontage, depth, and whether a previous owner already used the permission the way the house on Fairview Avenue did. If you're comparing two similarly priced houses in this neighbourhood, the number that actually separates them might not be on the listing at all. It's on the survey.
If you're weighing a purchase in High Park North, or trying to understand what a specific lot's dimensions actually let you do with it, Kim Kehoe and the team can walk through the details with you before you make an offer. Contact us.
