Garden suites and laneway suites in Toronto

A garden suite or laneway suite adds a separate home in your backyard. Here are the rules that decide whether one fits your lot, and what to know before you rent it out.

By Mehran Salehian, Sales Representative · Reviewed October 2026

Garden suite or laneway suite?

Both are small, self-contained homes in a separate building behind the main house. The difference is the lane.

• A laneway suite is on a lot that backs onto or sits beside a public lane, and is generally reached from the lane. The lot's rear or side lot line, or the two together, must touch the lane for at least 3.5 metres (Zoning By-law Chapter 150.8).
• A garden suite is in the rear yard of a lot that does not abut a public lane (City of Toronto, Garden Suites).

A lot can have one or the other, not both. Each lot can have only one such suite.

Where they're allowed

Both types are permitted in Toronto's residential zones (R, RD, RS, RT and RM), subject to the zoning standards. Laneway suites have been allowed since 2018, and garden suites since 2022. Lots still zoned under a former municipal by-law, such as some in Etobicoke and the former North York, aren't covered by the garden suite by-law. Call Toronto Building at 416-397-5330 if yours is one of them (Garden Suites).

You can't sever the lot to put the suite and the main house on separate properties.

The main zoning rules

Council updated both sets of rules on July 24, 2025, to line them up with Ontario Regulation 462/24 (By-law 849-2025, garden suites; By-law 847-2025, laneway suites). The figures below come from the current zoning text.

Height and separation from the house

The two rules work together. For both garden and laneway suites:

• A suite up to 4.0 metres tall must be at least 4.0 metres from the main wall of the house.
• A suite taller than 4.0 metres must be at least 7.5 metres from the house, and can then be up to 6.3 metres tall.

So a two-storey suite needs a deep enough yard to sit 7.5 metres back from the house. For garden suites, the separation is 5.0 metres in an area of the east end bounded by Coxwell, the Don River, Victoria Park and Lake Ontario (Zoning By-law Chapter 150.7).

Size

• Garden suites: up to 120 square metres of gross floor area in total, or 60 square metres for a one-storey suite, and always smaller than the main house (Chapter 150.7).
• Laneway suites: up to 10.0 metres long and 8.0 metres wide, and smaller in floor area than the main house (Chapter 150.8; By-law 847-2025).

Setbacks

• Garden suites: at least 1.5 metres from the rear lot line, or half the suite's height on lots deeper than 45 metres if that is more. Add 1.5 metres where the rear lot line backs onto a residential lot and the suite has windows above 4.0 metres. Side setbacks depend on the lot and on whether the side wall has windows or doors (By-law 849-2025).
• Laneway suites: generally 1.0 metre from the rear and side lot lines. A setback can drop to zero where the lot line doesn't touch a street or lane and that wall has no openings (Chapter 150.8).

Lot coverage and landscaping

• Garden suites, coverage: either all buildings on the lot together cover no more than 45% of it, or the suite is left out of the main calculation and all ancillary buildings together stay within 20% of the lot.
• Garden suites, landscaping: at least 50% of the area between the back of the house and the rear lot line must be soft landscaping, or 25% on lots 6 metres wide or narrower.
• Laneway suites, landscaping: 85% soft landscaping between the house and the suite on lots wider than 6 metres (60% on narrower lots), and 75% between the suite and the lane, not counting a driveway and a walkway of up to 1.5 metres.

Parking

A garden suite needs no parking space, but it must have at least two bicycle parking spaces (Chapter 150.7).

Fire and emergency access

Firefighters must be able to reach the suite. This comes from the Ontario Building Code, not the zoning, so it can't be varied by the Committee of Adjustment. For a garden suite, Toronto Building asks for the following (City of Toronto, emergency access to a garden suite):

• A clear path from the street: at least 1.0 metre wide and 2.1 metres high, or 0.9 metres wide if the suite is sprinklered. It can run along your side yard, or be shared with a neighbour through a limiting distance agreement with the City.
• A maximum distance of 45 metres from the street to the suite's entrance. This can be extended to 90 metres with added measures, such as sprinklers plus an exterior strobe light and an interconnected alarm system designed by an engineer.
• A fire hydrant within 45 metres of where a fire truck would stop.

Narrow side yards are the most common reason a garden suite doesn't work. Measure before you pay for drawings.

Trees

Trees on private property 30 cm or more in diameter, and any tree on a City street, are protected. The City says a garden suite "should not result in the removal of a healthy by-law protected tree", and it can refuse a tree permit. Every building permit and Committee of Adjustment application needs a tree declaration form (Garden Suites). If there's a large tree in the backyard, have an arborist look at it before you design.

Permits

1. Check your zone and lot details on the zoning map or with our lot check.
2. Have a designer or architect prepare drawings. The City offers pre-reviewed certified plans that can shorten Building Code review, though zoning and site review still apply.
3. Get a Zoning Applicable Law Certificate. The City recommends one.
4. If you need relief from a zoning rule, apply to the Committee of Adjustment for a minor variance before the building permit.
5. Apply for the building permit. Water and sewer connections are meant to come from the main house.

An existing garage can sometimes be converted. It gets relief from setbacks and separation but must meet the other rules. A structure built without a permit is treated as new.

Development charges

• Toronto's deferral program. Development charges on an eligible garden or laneway suite can be deferred for 20 years from the building permit under an agreement registered on title. They become payable if the lot is severed, or if the property is sold without the buyer taking over the agreement (City of Toronto deferral program). A May 2026 City report describes the deferral as lasting 20 years, "after which no development charges are payable" (City of Toronto). Apply when you apply for the building permit, and don't pay the charges first, because the City can't credit them back.
• Exemptions. Under Toronto's by-law, second, third and fourth units on a lot are exempt from development charges. Since July 2025, a lot can have up to six units in the main building plus an eligible garden or laneway suite without paying development charges (City of Toronto report, May 2026).

Outside Toronto: the provincial "three units" rule

Across Ontario, provincial law has allowed up to three units on a residential lot since November 28, 2022. This applies in settlement areas with full municipal water and sewer services. The three units can be all in the main house, or two in the house and one in a separate building. Municipalities can't charge development charges on these units, can't set a minimum unit size and are limited in the parking they can require (Environmental Registry of Ontario). The size, height and setback rules still come from each city's zoning by-law, so a garden suite in Mississauga or Vaughan follows different numbers than one in Toronto.

Renting it out

• Long-term rentals. Ontario's standard lease applies to most residential tenancies. A suite first occupied for residential purposes after November 15, 2018 is exempt from the provincial rent increase guideline, but you still need 90 days' written notice and generally 12 months between increases (Ontario: residential rent increases). Choose tenants by fair, consistent criteria, as Ontario's Human Rights Code requires.
• Short-term rentals. Toronto only allows short-term rentals in your principal residence. You can short-term rent a garden or laneway suite only if it is where you live. If you live in the main house, you can't rent the suite short-term. Entire-home short-term rentals are capped at 180 nights a year, and hosts must register with the City (City of Toronto, short-term rentals).
• Financing. If you already own the home, since January 15, 2025 you can refinance an insured mortgage up to 90% of the value after the suite is built, as long as that value is under $2 million and the property has no more than four units. The new unit can't be a short-term rental (Department of Finance Canada).

Before you commit, model the rent against the building cost with our feasibility tool.

Want a second opinion on a specific lot? Talk to Mehran or run the lot check.

This guide is general information, not legal, tax or financial advice. Rules and rates change; confirm the details with your lawyer, lender or accountant.