How big can a garden suite be in Toronto?

The footprint is the lesser of 40 percent of the rear yard or 60 square metres, and the interior floor area has to stay below the main house. Height is 4.0 m if the suite sits 5.0 m from the house, rising to 6.0 m at 7.5 m of separation, and a 45 degree angular plane starting at 4.0 m applies on the front, rear and sides.

A garden suite also needs a 1.0 m unobstructed emergency access path with 2.1 m of vertical clearance within 45 m of a public street, and it cannot require removal of a protected tree. No car parking is required, two bicycle spaces are.