A garden suite is a self-contained home in the rear yard. On a deep enough Toronto lot it adds another unit on top of your multiplex — here's how to tell if your lot qualifies.

Sample of lots for sale across Toronto.
Garden suites generally need enough depth to keep required separation from the main house and rear lot line — as a rule of thumb, lots roughly 90 ft deep or more. The map flags garden-suite-eligible lots and shows the buildable rear-yard envelope.
A garden suite stacks on top of your multiplex permissions: a fourplex plus a garden suite is five units, and a sixplex plus a garden suite is seven — which can open up MLI Select financing.
As a guide, about 90 ft or deeper, so the suite can keep the required separation from the main house and rear property line. Confirm the exact requirements for your lot with the City.
Yes — it's an additional self-contained unit on top of the multiplex permissions, so a fourplex plus a garden suite is five units.
As-of-right unit potential shown here is a planning guide generated from Toronto's multiplex and Expanding Housing Options in Neighbourhoods (EHON) permissions, not legal advice. Always confirm what a specific lot allows with the City of Toronto or a qualified planner before purchasing or designing.