Accessory Dwelling Units in Toronto - Design, Permits, Construction

Toronto's laneway network - more than 300 km of it, and 2,400+ named lanes - is the reason the city wrote Canada's first modern laneway-suite by-law in 2018. Most of our downtown builds sit on lots under 25 ft wide where the rear lane, not the driveway, is the construction access. Toronto permits both laneway suites (2018 by-law) and garden suites (city-wide since February 2022), with a dedicated Laneway Suite and Garden Suite review stream at City Planning.

Narrow downtown lots with rear public laneways - Toronto has over 300 km of them, more laneway frontage than any other Canadian city. Toronto sees 122 cm of snow and -3.6°C winter averages.

Four physical forms are available on a Toronto lot - detached garden suite or laneway house, an internal basement or upper-floor suite, a garage conversion, and a factory-built module - and the lot itself, not preference, usually decides which two are realistic. We run a feasibility overlay on the parcel first - zoning envelope, servicing capacity, rear-yard access - and only then price the two forms that survive it. Bill 23 permits up to three residential units as-of-right on most serviced Toronto lots, which removes the rezoning application from the default path.