The typical garden suite cost Toronto homeowners can expect in 2026 is roughly $250,000 to $600,000 or more all-in, depending on size, finish level and site conditions. Construction alone often runs about $400 to $650 per square foot, before design fees, permits, servicing and HST.
That is a wide range, and for good reason. A compact one-storey studio on an easy lot is a very different project from a two-storey, two-bedroom suite with a basement, premium finishes and long service runs. This guide explains what drives the price, what the City allows, and how to plan a garden suite that adds real value to your property.
Key takeaways
- Most Toronto garden suites typically cost $250,000 to $600,000+ all-in; high-end two-storey suites can exceed that.
- Zoning caps a garden suite at 120 square metres of gross floor area, or 60 square metres if it is one storey.
- Height is limited to 4.0 metres if the suite is less than 7.5 metres from the house, or 6.3 metres if it is 7.5 metres or more away.
- Garden suites are currently exempt from City development charges and parkland dedication, subject to the City’s conditions.
- Expect roughly 10 to 18 months from design to move-in, longer if a minor variance is required.
What Is a Garden Suite, and How Is It Different From a Laneway Suite?
A garden suite is a self-contained home built in the rear yard of a house, detached from the main dwelling. It has its own kitchen, bathroom and living space, and it can house family members, serve as a home office or studio, or be rented out.
The key difference from a laneway suite is location. If your lot backs onto a public laneway, the City directs you to the laneway suite rules instead. A garden suite is for lots without that lane frontage, so access, servicing and firefighter access all come from the street through your property.
That distinction matters for cost. Laneway suites can often run services and access from the lane, while garden suites usually connect water, sewer and power through the main house and across the yard. If you are weighing both options, our guide to laneway home costs in Toronto is a useful comparison.
A few other basics apply. Toronto permits one garden suite with one unit per lot in residential zones, and you cannot sever the lot so the house and suite sit on separate properties.
Garden Suite Toronto Rules at a Glance (2026)
Garden suites are regulated by Chapter 150.7 of Zoning By-law 569-2013. Council updated several standards in 2025 to align with Ontario Regulation 462/24, so older articles may quote outdated figures. The table below summarizes key standards from the amended by-law.
| Rule | Current standard (summary) |
|---|---|
| Maximum gross floor area | 120 m² (about 1,290 sq ft); 60 m² (about 645 sq ft) if one storey; must be smaller than the main house |
| Maximum height | 4.0 m if less than 7.5 m from the house; 6.3 m if 7.5 m or more away; maximum two storeys |
| Separation from the house | At least 4.0 m for a suite up to 4.0 m tall; at least 7.5 m if taller (5.0 m in a defined area of the east end) |
| Rear yard setback | Generally 1.5 m; more on deep lots or where upper-level rear windows face a residential lot |
| Side yard setback | Generally 0.6 m to 3.0 m, based on lot frontage and whether the side wall has openings |
| Lot coverage | Either 45% for all buildings, or the suite excluded with all ancillary buildings capped at 20% of the lot |
| Soft landscaping | At least 50% of the rear yard (25% on lots 6.0 m wide or less) |
Fire access is handled separately under the Ontario Building Code, and the City notes it cannot be varied through a minor variance. On narrow lots, the path for firefighters is often the deciding factor in whether a suite is feasible at all.
These rules are summaries, not legal advice. Because the by-law has changed recently and site conditions vary, always confirm current requirements on the City of Toronto’s garden suites page or through a zoning review before you design.
Garden Suite Cost Toronto: Price Ranges by Size and Finish
The figures below are typical all-in estimates for 2026, based on publicly quoted Toronto market ranges. They include design, permits, servicing, construction and landscaping, but not HST. Your actual cost will depend on your lot, design and specifications.
| Suite type | Approx. size | Typical all-in estimate (before HST) |
|---|---|---|
| Prefab or modular studio, one storey | 300 to 500 sq ft | $150,000 to $275,000 |
| Custom one-storey, standard finishes | 450 to 645 sq ft | $250,000 to $400,000 |
| Two-storey, one to two bedrooms | 800 to 1,000 sq ft | $375,000 to $600,000 |
| Two-storey, luxury finishes, basement | 1,000 to 1,290 sq ft | $550,000 to $850,000+ |
Smaller suites often cost more per square foot. A kitchen, bathroom, mechanical system and service connections cost roughly the same whether the suite is 500 or 1,000 square feet, so those fixed costs are spread over less floor area.
Finish level is the other big lever. Custom millwork, large-format glazing, heated floors and high-end appliances can add tens of thousands of dollars, which is why a garden suite built to match a luxury main house sits at the top of these ranges.
Garden Suite Cost Breakdown: Where the Money Goes
Here is how the budget for a typical two-storey suite of roughly 900 square feet often breaks down. Treat these as planning estimates; every site is different.
| Cost category | Typical estimate | What it covers |
|---|---|---|
| Design, surveys and permits | $30,000 to $60,000 | Architectural drawings, structural and mechanical design, survey, arborist report, zoning review, permit fees |
| Servicing | $25,000 to $70,000 | Water, sewer and electrical connections from the main house, trenching, possible panel upgrade |
| Site work and foundation | $40,000 to $90,000 | Excavation, footings, slab or basement, waterproofing, material hauling through a narrow side yard |
| Structure and envelope | $100,000 to $180,000 | Framing, roofing, windows, doors, insulation, exterior cladding |
| Mechanical, electrical, plumbing | $50,000 to $90,000 | Heating and cooling, ventilation, wiring, fixtures, hot water |
| Interior finishes | $70,000 to $160,000 | Kitchen, bathroom, flooring, drywall, millwork, paint, appliances |
| Landscaping and access | $15,000 to $40,000 | Pathway, lighting, fencing, restoring soft landscaping |
| HST | 13% on taxable work | Applies to most contractor and professional services in Ontario |
Build a contingency of about 10% into your budget. Garden suites often reveal surprises such as poor soil, old sewer laterals or an electrical service that cannot handle a second unit. Our article on the hidden costs of building in Toronto covers many of the same risks.
Development charges and parkland fees
One genuine saving: the City states that garden suites are exempt from development charges under By-law 1137-2022 when the property has no more than four units, and exempt from parkland dedication for one ancillary unit where the parcel has no more than five units. Exemptions can change, so confirm the status when you apply.
How to Build a Garden Suite in Toronto: Permits and Timeline
If you plan to build a garden suite in Toronto, the approval path usually looks like this:
- Feasibility check. Review lot size, separation distances, trees, fire access and servicing before paying for full drawings.
- Design. An architect or designer prepares drawings that meet zoning and the Ontario Building Code.
- Zoning review. The City recommends a Zoning Applicable Law Certificate to confirm compliance.
- Minor variance, if needed. Any zoning relief must come from the Committee of Adjustment before the building permit.
- Building permit. Submit drawings with a Tree Declaration Form and any required tree permits.
- Construction and inspections. City inspectors review key stages through to final inspection.
The City also publishes pre-approved garden and laneway suite plans. They can save design time, but you still need a permit and a site-specific review, and changes to the plans remove their pre-approved status.
Typical garden suite timeline
As a rough guide, design and engineering often take 2 to 4 months, permitting 1 to 3 months, and construction 6 to 10 months. Most projects take about 10 to 18 months in total. If you need a minor variance, add several months; see our guide on how long the Committee of Adjustment takes in Toronto.
Rental Income and ROI: Is a Garden Suite Worth It?
A garden suite can pay for itself in several ways: rental income, housing for family, or added property value at resale. The right answer depends on your goals and how long you plan to stay.
For a simple illustration only, consider a hypothetical suite that costs $450,000 to build and rents for $3,000 a month. That is $36,000 a year in gross rent, or about an 8% gross yield, before property tax, insurance, maintenance, vacancy and income tax. Check current comparable rents in your neighbourhood rather than relying on any single figure.
Other factors to weigh:
- Your property assessment may rise, which can increase property tax.
- Rental income is taxable, and a rental unit can affect the principal residence exemption on part of your property; speak with your accountant.
- Multigenerational use often delivers value that does not show up in a yield calculation.
- A well-designed suite that complements the main house tends to support resale value far better than a generic box.
How to Reduce Your Garden Suite Cost
You can bring the garden suite cost down without compromising quality by making smart decisions early:
- Design to the as-of-right rules. Avoiding a minor variance saves both fees and months of carrying costs.
- Keep the form simple. A rectangular footprint with a straightforward roof is far cheaper than complex massing.
- Stack wet areas. Placing the kitchen and bathroom close together shortens plumbing runs.
- Plan servicing early. Confirm your electrical capacity and sewer lateral condition before design is finalized.
- Consider a slab instead of a basement. Basements add space but also significant excavation and waterproofing costs.
- Lock in a fixed price. A fixed price contract shifts much of the cost risk away from you.
Building a Garden Suite Alongside a New Custom Home
If you are already planning a knockdown and rebuild, adding a garden suite to the same project is often the most efficient route. One design team can plan both buildings together, so the main house and suite share an architectural language and meet separation, coverage and landscaping rules as a package.
Building both at once also lets you size the electrical service, water line and sewer connection for two units from the start, rather than retrofitting later. Site mobilization, excavation equipment and trades are already on the property, which can reduce duplicated costs.
There are trade-offs. A larger combined project needs careful scheduling and a bigger upfront budget. Our overview of the cost of building a custom home can help you see how a suite fits into the overall picture, and our custom home building services page explains how we manage design and construction under one roof.
Frequently Asked Questions
How much does a garden suite cost in Toronto?
In 2026, a garden suite in Toronto typically costs about $250,000 to $600,000 all-in before HST, and luxury two-storey suites can exceed $800,000. Construction alone often runs $400 to $650 per square foot. Size, finish level, servicing distance, foundation type and whether you need a minor variance all have a major effect on the final price.
How big can a garden suite be in Toronto?
Under the amended Zoning By-law 569-2013, a garden suite can have up to 120 square metres of gross floor area, or 60 square metres if it is one storey. It must also be smaller than the main house on the lot. Height, setbacks and lot coverage limits may further restrict size, so confirm your site's limits with the City.
Do garden suites pay development charges in Toronto?
According to the City of Toronto, garden suites are currently exempt from development charges under By-law 1137-2022 where the property has no more than four units. They are also exempt from parkland dedication for one ancillary unit on parcels with no more than five units. Policies can change, so confirm the exemption when you apply for your permit.
How long does it take to build a garden suite in Toronto?
Most garden suites take about 10 to 18 months from the start of design to move-in. Design and engineering often take 2 to 4 months, permitting 1 to 3 months, and construction 6 to 10 months. A Committee of Adjustment application, tree permits or complex servicing can add several months to the schedule.
Do I need a permit to build a garden suite in Toronto?
Yes. A garden suite requires a building permit and must comply with the zoning by-law, the Ontario Building Code and the City's tree protection rules. The City recommends a zoning review first. If your design needs zoning relief, you must obtain a minor variance from the Committee of Adjustment before the building permit can be issued.
Plan Your Garden Suite With Marvel Homes
A garden suite is a significant investment, and the best results come from getting zoning, servicing and design right before construction begins. Marvel Homes Development brings more than 30 years of Toronto building experience, in-house architectural design and dedicated project management to every project.
Our fixed price contracts and guaranteed completion dates give you cost and schedule certainty, and new homes we build are backed by Tarion warranty coverage. Whether you want a stand-alone suite or a garden suite as part of a new custom home, we can help you assess feasibility and build a realistic budget.
Contact Marvel Homes to book a consultation and get a clear picture of what your garden suite will cost.