Garden Suites in Toronto: What the By-law Really Lets You Build
Toronto allows one garden suite per house lot, up to 60 m² on one storey or 120 m² on two. The rules that kill most projects are not size. They are the 45 m fire path, a protected tree, and the separation from your house.
At a glance
*2nd, 3rd or 4th unit on a lot of no more than four units. Height and floor area depend on distance from the house. Confirm your lot with Toronto Building.
Yes, most Toronto house lots in R, RD, RS, RT and RM zones can take one garden suite. It can be up to 60 m² on one storey or 120 m² on two, must be smaller than the main house, and can only reach 6.3 m if it sits 7.5 m or more from the house. No development charges on the 2nd to 4th unit. Fire access is the usual deal-breaker.
We Don’t Build in Toronto. Here’s why that helps you.
We are a builder based in Tiny Township. We build garden suites in Simcoe County and around Georgian Bay through ICFhome.ca. Outside Simcoe, we sell lot reports, permit packages and builder calls. We do not swing a hammer in Toronto.
That means we have nothing to sell you on the construction side, so we can tell you plainly when your lot is a poor bet. We have been building since 1979 and have watched a lot of good money go into backyards that should have been checked first.
What Toronto calls it
Toronto uses two words, and they are not the same thing. A garden suite is a detached unit in the rear yard of a lot that does not back onto a public lane. A laneway suite is a detached unit on a lot that abuts a public lane. They have separate rule sets in Zoning By-law 569-2013 (garden suites live in Chapter 150.7) and different fire access options. If you have a lane behind you, read the laneway rules too, because they often work out better. Our garden suite vs laneway suite page walks through the difference.
Either way, you cannot sever it. The City’s garden suites page is clear that a separate lot for the suite is not permitted, and water and sewer are meant to come from the main house.
The Numbers from the 2025 amendments
Council adopted updated garden suite rules on July 24, 2025 (item PH23.1, enacted as By-law 849-2025 the same day) to line up with Ontario Regulation 462/24. The City says they are in force except for one property-specific appeal. These are the main standards.
| Rule | Toronto standard | What it means on site |
|---|---|---|
| Units | One garden suite, one unit, per lot | It sits with the main house and any secondary suite. Count your total units before you design. |
| Floor area | Max 60 m² one storey; max 120 m² two storeys; always less than the main house GFA | The suite’s basement and any open-to-below space count toward its GFA. A small bungalow can cap your suite. |
| Height | 4.0 m if less than 7.5 m from the house; 6.3 m if 7.5 m or more away | Measured from average grade, using the lower of existing or finished ground. Back-filling to gain height does not work. |
| Separation from house | At least 4.0 m main wall to main wall for a suite 4.0 m tall or less; 7.5 m for a taller suite | Two storeys need a deep yard. Measure from the back wall of the house, not the deck. |
| Rear setback | 1.5 m (lot depth 45 m or less); greater of 1.5 m or half the suite height on deeper lots; 1.5 m more where upper windows above 4.0 m face a residential rear lot | Windows facing the neighbour cost you yard depth. |
| Side setback | With doors or windows in the side wall: greater of 1.5 m or 10% of lot frontage, max 3.0 m | A blank side wall can sit closer. Ask Zoning Review for your exact number. |
| Lot coverage | Option A: all buildings up to 45% of the lot. Option B: suite left out, all ancillary buildings together up to 20% | Big decks (over 5% of lot area) and cantilevers count. So does that old shed. |
| Platforms | Must meet the suite’s setbacks and separation | The cute porch can push the whole building out of compliance. |
| Severance | Not permitted | The suite stays on your title forever. |
Last checked October 2026 · Source: City of Toronto Garden Suites and By-law 849-2025 (enacted July 24, 2025) · supplementary report (July 2025)
Separation is a live question. Ontario Regulation 462/24 caps the separation a municipality can require between buildings on many urban lots at 4.0 m. Toronto’s 7.5 m trigger for taller suites is in its by-law text. If you are planning two storeys on a shallow yard, put that exact question to Toronto Building’s Zoning Review before you pay for drawings.
Existing garages and sheds get a break. If the structure was built under a permit, the City gives it relief from the new setbacks and separation. If it was built without one, it is treated as new. That “garage the last owner put up” is worth a call to find the permit before you plan to convert it.
The 45 m Path is where most lots fail
Toronto Building and Toronto Fire review this under the Ontario Building Code. It cannot be fixed with a minor variance. Measure it before you do anything else.
- Width and height: 1.0 m wide by 2.1 m high if the suite is not sprinklered; 0.9 m wide by 2.1 m high if it is. Hydro and gas meters may stick into the width.
- Length: 45 m maximum from the street (or flanking street) to the suite entrance. Up to 90 m if you add a City-accepted fire-safety measure.
- Hydrant: one must be within 45 m of where the fire truck would stop.
- Option 1 for the 90 m path: an engineered sprinkler system (NFPA 13, 13R or 13D), an exterior strobe at least 1.8 m above grade visible from the street, and an engineered smoke alarm/warning system.
- Option 2: more fire protection in the building itself plus the strobe and warning system. Under 2.4 m limiting distance, no unprotected openings and at least a 3/4-hour wall. Under 1.2 m, add non-combustible cladding.
- No room on your side? A Limiting Distance Agreement with your neighbour can secure the path. It is registered on both titles. The City Solicitor bills $274.65 per hour, and the fastest the City says it has seen is about a week.
Rule of thumb from the field: walk it with a tape and a 1 m stick. Air conditioners, gas meters with bollards, a side-yard step, a fence post. Any one of those can turn a 1.05 m side yard into a 0.95 m side yard. Source: Toronto Building, fire department access to a new garden suite (page modified September 29, 2026).
How a Toronto Garden Suite gets from sketch to shovel
Check the lot
Zone (R, RD, RS, RT or RM), lot depth, the fire path, hydrant distance, trees 30 cm or more in diameter, and whether you are under an older former by-law (for example the Etobicoke Zoning Code). Former by-law properties call Toronto Building at 416-397-5330.
Deal with trees early
Private trees 30 cm or more across, and any City street tree, are by-law protected. The City says a garden suite should not remove a healthy protected tree, and Forestry can refuse the tree permit. A Tree Declaration Form goes in with the permit.
Get a Zoning Review (recommended)
A Zoning Applicable Law Certificate tells you up front what complies. If anything does not, you go to the Committee of Adjustment for a minor variance before the building permit.
Pick custom or Certified Plans
Either have a designer draw it, or use one of the City’s 24 pre-approved “Made in Toronto” plans (below). You still need a site plan and a lot grading plan either way.
Assemble the package
Site plan, lot grading plan (no new ponding on you or the neighbours), floor and roof plans, elevations, sections, Application to Construct, SB-12 energy form, Residential Infill Public Notice declaration, Municipal Road Damage deposit form, Schedule 1 designer form, Tree Declaration, and a plumbing data sheet.
Apply online
Submit through Toronto Building Online Services. The City now offers an AI-assisted pre-check before you submit. Mechanical, plumbing and drain permits follow the building permit.
DC deferral paperwork if it applies
If you are using the DC deferral program, apply at the same time as the permit. Review takes about 15 to 20 business days. Do not pay DCs first, the City cannot credit them back.
Build and inspect
Inspections run like a new house. The road damage deposit comes back after the City is satisfied the road and boulevard are intact.
| Fee | Amount (2026) | Note |
|---|---|---|
| Building permit, Group C residential | $18.56 per m² | Example: a 60 m² suite is about $1,114 before the unit fee. Check the City fee page for your exact calculation. |
| Residential unit fee | $56.33 per new unit | Added to the permit |
| Permits for certified plans | $15.75 per m² | City lists this row; confirm it applies to your application |
| Municipal road damage deposit | Not published on the guide page | Required for exterior work |
| Limiting Distance Agreement legal fee | $274.65 per hour | Only if you need the neighbour’s land for the fire path |
| Minor variance | Check current Committee of Adjustment fees | Only if zoning relief is needed |
Last checked October 2026 · Source: Toronto Building, new garden suite guide (modified August 27, 2026)
No DCs for Most Suites. No grant either.
DC exemption
Toronto DC By-law 1137-2022, s. 415-6(A)(2), exempts the second, third or fourth residential unit on a parcel, as long as the development is no more than four units. Garden suites are also exempt from parkland dedication where the parcel has no more than five units.
DC deferral program (still listed)
The older Laneway and Garden Suite DC Deferral program defers DCs for 20 years from permit issue. You sign an agreement and your lawyer registers a Section 118 restriction on title. DCs come due if the lot is split or the house is sold without an Assumption Agreement. With the exemption above, most owners will not need it. Ask before you sign anything on title.
Affordable Laneway Suites Program
Discontinued. The City says it lost provincial funding and is not expected to come back. If someone quotes you a $50,000 forgivable loan for a Toronto suite, they are reading an old page.
Grants in 2026
None found on City pages for garden suites. What you get is the DC and parkland exemption, free pre-approved plans, and a refundable road deposit. For federal money, see the multigenerational renovation tax credit and our funding directory.
Last checked October 2026 · Source: City of Toronto DC Deferral Program (modified August 14, 2026)
Renting it out? A new detached rental unit can trigger the HST self-supply rule when it is first rented. Run the free rental check at OntarioHSTRebates.ca before your first tenant moves in. Not tax advice, just the thing most people find out about too late.
Toronto’s 24 Certified Plans and what they leave out
The City’s Made in Toronto pre-approved plans come in four types: studio garden suite, two-bedroom garden suite, studio laneway suite, and two-bedroom laneway suite. Each comes with a fire access option (prescriptive, Option 1 or Option 2) and a heat pump or forced air choice, for 24 plan numbers. They were updated August 5, 2025.
You reference the plan number and upload only a site plan. That saves real design money. What it does not do:
- It does not place the building on your lot. Setbacks, separation and coverage are still checked against your yard.
- It does not solve fire access. You still pick the option that matches your path.
- It does not design your water, sewer and power connections to the house.
- Change anything, even the HVAC or a plumbing fixture, and it is no longer pre-approved.
- You or your designer still sign Schedule 1 and take responsibility for the design.
Using a Toronto Certified Plan? We do the paperwork around it.
Our Urban Pre-Approved Wrapper covers the site plan, grading coordination, forms, and a heat loss/HVAC design if needed. From $1,499.99 + HST, fixed quote after we see your survey.
The Pipes, Wires and Dirt nobody prices on the first call
Water and sewer from the house
Toronto expects the suite to connect through the main house. If your sewer lateral is old clay or shallow, the plumber may find it cannot take the new load at the right slope. A camera inspection costs far less than finding out with the excavator.
Hydro service size
Heat pump, induction range, water heater, maybe an EV charger later. Many older Toronto houses are on 100 amp service. Upgrading the service is common and it is not cheap. Get the electrician to do a load calculation first.
Getting materials in
That same 1 m side yard is your only access for a mini-excavator, concrete and lumber. Concrete pumping, hand-bombing and crane lifts over the house are line items. Prefab is not always the easy way here.
Grading and drainage
The lot grading plan must show no new ponding on you or the neighbours. Small Toronto yards often need a sump or soakaway design to make that work.
Heat loss and energy forms
Every permit needs an SB-12 energy design summary, and the HVAC has to be sized. If your designer does not do it, OntarioHeatLoss.ca prepares BCIN-stamped heat loss and HVAC design for permits.
Trees and roots
Even if you are not cutting a tree, digging in a protected tree’s root zone can need protection hoarding and arborist input. Helical piles or a raised foundation sometimes save a tree and a refusal.
What a Toronto Garden Suite actually costs
A July 2025 CBC report quoted Toronto garden and laneway suite projects at $200,000 to $350,000 for a typical 500 to 600 sq ft unit. That lines up with what we see in quotes people send us, with the low end usually missing something.
| Line item | Builder estimate, Toronto, 500-600 sq ft | Why it moves |
|---|---|---|
| Design, survey, zoning review, permits | $12,000 – $35,000 | Certified Plans cut design; a minor variance or LDA adds to it |
| Servicing (water, sewer, hydro, gas or not) | $20,000 – $60,000 | Distance to the house, lateral condition, service upgrade |
| Foundation | $25,000 – $70,000 | Slab vs frost wall vs basement; tree protection; access |
| Building shell and finishes | $150,000 – $260,000 | Two storeys, finish level, fire protection option |
| Fire Option 1 or 2 extras | $0 – $30,000 | Sprinklers, strobe, warning system, rated walls |
| Typical total | $250,000 – $420,000 | Plus HST. Two-storey 120 m² suites run higher. |
Last checked October 2026 · Source: CBC (July 2025) for the quoted range; line items are our builder estimate, not a quote
Want to play with your own numbers? Use the cost calculator or read the full Ontario cost guide.
Where Toronto Owners lose money
- Buying plans before measuring the fire path. If it is 52 m and 0.95 m wide, your plan choice just changed, and so did the budget.
- Forgetting the suite must be smaller than the house. A 1-storey 90 m² bungalow will not get you a 120 m² two-storey suite.
- Designing two storeys in a yard that cannot give 7.5 m. Under 7.5 m from the house, you are at 4.0 m height. That is one storey.
- Counting the deck as free. Decks over 5% of lot area count toward coverage, and platforms must meet setbacks.
- Ignoring the tree. A healthy protected tree can stop the whole job. Get an arborist before a designer.
- Tweaking a Certified Plan. Move one window and it is a custom design again, with the review time that comes with it.
- Signing a title restriction you do not need. Check whether the DC exemption already covers you before registering a deferral.
- Pricing from a prefab brochure. The box is maybe half the job. Foundation, cranes, servicing and permits are the other half.
Find out if your Toronto lot works before you pay a designer.
Our $399 + HST Garden Suite Feasibility Report checks zoning, fire path, separation, trees and servicing against your survey, delivered in 48 hours. The fee is credited toward permit plans.
Toronto Garden Suite questions people actually ask
How big can a garden suite be in Toronto?
Up to 60 m² of gross floor area on one storey, or 120 m² on two storeys, and always smaller than the main house. The suite’s basement counts toward that number. Setbacks, separation and the 45% lot coverage option can shrink what fits on your particular lot, so confirm with a Zoning Review.
How tall can a garden suite be in Toronto?
4.0 m if it is less than 7.5 m from the main house, and 6.3 m if it is 7.5 m or more away. Height is measured from average grade, using the lower of existing or finished ground. Go one centimetre over and you are at the Committee of Adjustment.
What if my side yard is too narrow for fire access?
The path must be 1.0 m wide (0.9 m if sprinklered) and 2.1 m high. If you cannot get that on your own land, a Limiting Distance Agreement with your neighbour can secure it, registered on both titles. If the path is longer than 45 m, sprinklers or added fire protection plus a strobe and alarm system can allow up to 90 m. A minor variance cannot fix fire access.
Do I pay development charges on a Toronto garden suite?
Usually not. Toronto’s DC by-law exempts the second, third or fourth unit on a parcel where the total is no more than four units, and garden suites are exempt from parkland dedication up to five units. School board charges and other fees can still apply, so ask Toronto Building when you apply.
How much is a building permit for a garden suite in Toronto?
The 2026 Group C residential rate is $18.56 per m² plus $56.33 per new unit. For a 60 m² suite that works out to roughly $1,170. Add mechanical, plumbing and drain permits, the road damage deposit, and any Committee of Adjustment fee if you need a variance.
Does Toronto have a garden suite grant in 2026?
We found none on City pages. The Affordable Laneway Suites Program that offered forgivable loans has been discontinued and the City does not expect to bring it back. What remains is the DC exemption, the DC deferral program, and the free Certified Plans.
Can I sever or sell my garden suite separately?
No. Toronto does not permit a severance that puts the garden suite on its own lot. It stays part of your property and sells with the house. That matters for financing and resale, see our page on garden suite resale value.
Can I use a Toronto pre-approved plan on any lot?
Only if the lot works. The plan is pre-reviewed for code and zoning as a building, but placement, setbacks, fire access and servicing are still checked on your site. Any change to the plan, even HVAC or plumbing, removes the pre-approved status. You still need a site plan and a lot grading plan.
Do you build garden suites in Toronto?
No. We build in Simcoe County and around Georgian Bay. For Toronto lots we sell the $399 + HST feasibility report, permit packages built around your plans or a Certified Plan, and paid builder calls where we review a quote or plans with you.