Secondary Suites in North York - Design, Permits, Construction

North York's 1950s-60s bungalow belt around Willowdale and Don Mills gives us the deepest rear yards inside Toronto's boundary - 120 ft lots where a 700 sq ft garden suite still leaves usable green space. Almost none of these lots have a laneway, which is why nearly every North York project we build is a garden suite rather than a laneway house. Falls under the City of Toronto garden suite by-law; North York's post-war lots rarely have laneways, so garden suites (not laneway suites) are the usual permitted form.

Deep post-war bungalow lots, commonly 50 ft × 120 ft, with rear yards large enough for a detached garden suite plus the required 1.5 m separation. North York sees 133 cm of snow and -4.2°C winter averages.

"Secondary suite" is the Ontario planning term for a second self-contained dwelling inside the existing house, so the review in North York turns on the interior - separate kitchen and bath, an exit that does not pass through the primary unit, and rated separation between the two. Because the shell already exists, the schedule is driven by inspection sequencing rather than by weather: rough-in, framing and insulation inspections gate one another regardless of the April-November season. Bill 23 makes up to three units as-of-right on most serviced North York lots, so a secondary suite generally proceeds by building permit alone without a rezoning application.