A laneway suite is a small self-contained home built at the rear of a Toronto lot that backs onto a public laneway. If your property touches a laneway for at least 3.5 metres and sits in a residential zone, you can usually build one as-of-right, which means no rezoning application and, in most cases, no Committee of Adjustment hearing.
Toronto has allowed laneway suites since 2018 under a program called Changing Lanes. Garden suites followed in 2022 for lots that do not touch a laneway, and the City refreshed the zoning rules for both in 2025. The two types work almost the same way. The difference comes down to whether the structure faces a laneway or simply sits in the rear yard.
The building footprint is capped at 60 square metres. Height depends on separation from the main house. A one-storey suite up to 4 metres tall needs at least 4 metres of clearance, and going to two storeys, up to 6 metres tall, requires 7.5 metres or more. Fire access and tree protection get reviewed as part of the building permit, and either one can sink a project on a tight lot, so a feasibility check should come before any design work.
Parking is simpler than most people expect. The City requires no car parking space for a laneway or garden suite, only two bicycle parking spots. Building one also removes the parking requirement for the main house.
The suite stays part of your property. You cannot sever it and sell it as a separate home. Owners use them as rental units, home offices, or housing for parents and adult kids. If you are shopping for a house with laneway potential, the projected rent may even help your financing, since lenders can count rental income toward a mortgage in some situations. Keep in mind that adding a suite raises your assessed value, which flows through to how your property taxes are calculated.
Budget realistically. These are full houses in miniature, with foundations, utility connections, and insulation, and most Toronto projects run well into the six figures. For many owners, a legal basement apartment reaches rental income for far less money, so it is worth comparing both routes before committing to either.
Related reading: What Makes a Basement Apartment Legal in Toronto?, Can You Use Rental Income to Qualify for a Mortgage in Canada?, and How Are Property Taxes Calculated in Toronto?