Introduction
With the growing demand for affordable housing in Toronto and the Greater Toronto Area (GTA), garden suites have become a popular solution for homeowners looking to maximize their property’s potential. However, building a custom garden suite requires following strict city regulations and obtaining the proper permits.
In this guide, we’ll cover everything you need to know about Toronto’s garden suite regulations in 2025, including zoning laws, the permit approval process, eligibility requirements, and common mistakes to avoid.
What Are Garden Suites? Legal Definitions & Requirements
Definition of a Garden Suite in Toronto
A garden suite is a self-contained residential unit located in the backyard of a primary home. Unlike laneway houses, garden suites do not require access to a laneway. These structures are considered Accessory Dwelling Units (ADUs) and are subject to Toronto’s By-law 2022-46, which legalized their construction.
Key Features of a Garden Suite
✔ Detached from the main house
✔ Fully functional living space (kitchen, bathroom, bedroom)
✔ Must meet zoning and safety codes
✔ Requires a building permit from the City of Toronto
Toronto & Ontario Zoning Laws for Garden Suites
Who Can Build a Garden Suite?
Garden suites are permitted on most residential properties in Toronto, but the property must meet certain size and zoning requirements.
Eligibility Criteria for Garden Suites in Toronto
- The property must be zoned for residential use (R, RD, RS, RT, RM).
- The lot must have enough space to accommodate a garden suite while maintaining required setbacks (distance from property lines).
- The main house must remain the primary residence—the garden suite cannot be the only dwelling on the lot.
Zoning & Setback Requirements
- Minimum lot size: No strict requirement, but the garden suite must fit within property boundaries.
- Maximum height: 2 stories (generally 6.3m or 20.6ft).
- Setbacks:
- Rear yard setback: Minimum 1.5m (5ft) from the back property line.
- Side yard setback: Minimum 0.6m (2ft) from the side property lines.
- Maximum lot coverage: A garden suite cannot cover more than 40% of the backyard area.
Parking & Access Requirements
- No additional parking is required for garden suites.
- A clear path (minimum 1m wide) must be available for emergency access from the street to the garden suite.
Permit Process: What You Need to Know
Step 1: Pre-Application & Property Assessment
Before applying for a permit, homeowners should conduct a property assessment to determine if their lot meets zoning requirements.
✔ Hire a professional builder like Custom Garden Suite for guidance.
✔ Consult Toronto’s Garden Suite Bylaws for updated regulations.
Step 2: Design & Architectural Plans
A detailed architectural drawing must be submitted, including:
✔ Floor plan & elevation drawings
✔ Site plan showing setbacks & access routes
✔ Electrical, plumbing, and HVAC plans
Step 3: Apply for a Garden Suite Permit
Homeowners must submit their building permit application to the Toronto Building Division. The application process includes:
- Site Plan Approval (if required)
- Zoning Review
- Building Code Compliance Check
💰 Permit Cost:
- $1,000 – $3,000, depending on project complexity.
- Additional development charges may apply.
Step 4: Construction & Final Inspection
Once approved, construction can begin. Inspections will be conducted at key stages, including foundation, framing, plumbing, and final occupancy approval.
⌛ Timeline:
- Permit approval: 3-6 months
- Construction: 4-6 months
Common Mistakes to Avoid When Applying for a Permit
🚨 1. Not Checking Zoning Requirements
Failing to verify lot size, setbacks, and height restrictions can result in permit denial.
🚨 2. Poor Design Planning
A garden suite must comply with fire codes, accessibility requirements, and energy efficiency standards. Hiring a professional designer is crucial.
🚨 3. Ignoring Utility Connections
Garden suites require separate water, sewage, and electrical connections. Plan these connections before construction to avoid unexpected costs.
🚨 4. Not Hiring Licensed Contractors
The City of Toronto requires garden suites to be built by licensed professionals. DIY construction may result in fines and permit revocation.
🚨 5. Underestimating Costs
The total cost of a garden suite can range from $150,000 – $250,000. Ensure proper budgeting to complete the project without delays.
Conclusion: Is a Garden Suite Right for Your Property?
Building a garden suite in Toronto is an excellent investment, but it requires careful planning, compliance with regulations, and a strong understanding of zoning laws.
🏡 Why Choose Custom Garden Suite?
✔ Expert Permit Assistance – We handle zoning, design, and approvals.
✔ Proven Experience – Successful projects like 28 Bobmar Road.
✔ Turnkey Solutions – From permits to construction, we do it all!
📞 Call Us: +1 (416) 273-4114
📩 Email: info@preconstruction.info
🌍 Visit: customgardensuite.ca
🚀 Get started on your custom garden suite today!