Quick Answer: Building permit cost in Ontario ranges from $1,800 to $8,000+ for a typical residential project in 2026, depending on your municipality and project scope. Toronto charges a base fee plus $16.60 per square metre of new floor area. Development charges are billed separately and can add tens of thousands of dollars to your total fees payable at the permit counter.
Building permit costs in Ontario vary far more than most homeowners expect. The province sets the legal framework through the Building Code Act, but each municipality writes its own fee bylaw and applies its own rates. A permit for the same 200-square-metre addition carries a meaningfully different price tag in Oakville than in Brampton, and Ontario’s 2026 Building Code update prompted several GTA municipalities to revise their fee schedules upward this year.
Missing a cost item at the permit stage, especially development charges, routinely forces homeowners to scramble for cash they did not budget. Know what you owe before you apply. Here is the full picture for 2026.
What Is a Building Permit Fee in Ontario?
A building permit cost in Ontario is the fee your municipality charges to review your drawings, conduct required inspections, and confirm your project complies with the Ontario Building Code and local zoning bylaws. Under the Building Code Act, 1992, municipalities must set permit fees at a level that fully offsets their administration and enforcement costs. They don’t generate revenue; they recover it.
Two calculation methods are most common across Ontario. GTA municipalities typically charge a flat base fee plus a per-square-metre rate on new floor area. Ottawa uses a valuation-based model: the City of Ottawa’s fee schedule sets the rate at $11.00 per $1,000 of declared construction value for alterations and renovations, with a minimum fee of $117. For a full breakdown of the updated code requirements driving these changes, see Leedway Group’s Ontario Building Code Guide 2026. Trade permits for HVAC, plumbing, and electrical work add $475 to $1,085 per trade in most GTA municipalities when those scopes exceed $5,000 in value.
How Much Do Building Permit Fees Cost Across Ontario Municipalities?
Permit fees for a typical new residential build across six Ontario municipalities in 2026:
| Municipality | Residential New Build Fee | Processing Time (First Review) |
|---|---|---|
| Oakville | $5,540 + $21.40/m² | 9–15 weeks |
| Toronto | $5,210 + $19.60/m² | 9–14 weeks |
| Vaughan | $4,665 + $18.00/m² | 7–12 weeks |
| Markham | $4,530 + $17.55/m² | 7–12 weeks |
| Mississauga | $4,335 + $17.30/m² | 6–11 weeks |
| Brampton | $3,995 + $16.15/m² | 6–10 weeks |
Oakville carries the highest municipal building fees in the GTA. Brampton is the most affordable entry point. Toronto and Mississauga both offer digital submission discounts of 8 to 12% through their respective online portals.
For a residential addition in Toronto, total permit fees typically land between $1,800 and $3,500. A new build permit runs $4,500 to $8,000 before trade permits and surcharges. At $19.60 per square metre, that works out to roughly $1.82 per square foot, one of the highest building permit cost per square foot rates in the province.
Toronto is also the only GTA municipality that applies mandatory surcharges on top of its base rate. These add roughly 6 to 10% to the total: the Building Code Act administration fee sits at 4.5% of the base permit, and the Toronto Construction Surcharge adds $3.00 per square metre. The City of Toronto’s 2026 fee schedule sets a minimum fee of $214.79 and an hourly rate of $92.79 for examination and inspection activities. Budget a 10 to 15% contingency above the listed base number for any Toronto project. Failed inspections trigger re-inspection costs of $260 to $575, billed separately from the original permit.
Are Development Charges Separate from the Permit Fee in Ontario?
Development charges are entirely separate from the building permit fee, and confusing them is the most expensive planning mistake in Ontario residential construction. Development charges (DCs) are one-time levies collected at the permit stage to fund growth-related infrastructure: roads, sewers, transit, and parks. The permit fee and DCs are billed on the same day but as distinct line items. Total fees payable at the permit counter regularly shock homeowners who budgeted only for the permit itself.
In high-growth GTA municipalities, DCs can run 5 to 20 times the permit fee alone. York Region municipalities charge between $20,997 and $25,262 in DCs per new single-family detached home. Ottawa development charges for a new single detached home reach $30,000 to $70,000 or more depending on unit size and location.
One time-sensitive window closes November 13, 2026. Peel Region’s Development Charges Grant Program is reducing regional DCs by 50% for eligible residential developments through a grant-in-lieu mechanism, extended by Regional Council in January 2026. For a standard new home in Brampton or Mississauga, that represents savings of more than $28,000 on the regional portion of development charges alone. Permits must be issued before the deadline to qualify.
For guidance on how these costs fit into a complete renovation or addition budget, see Leedway Group’s planning and financial guidance resource. Projects involving a secondary suite or garden suite carry different permit requirements; see our dedicated guide to garden suites in Toronto for the process specific to those structures.
Frequently Asked Questions
1. How much does a building permit cost for a home addition in Ontario?
A home addition permit in the GTA typically costs $1,800 to $3,500 for projects up to 80 square metres. Larger two-storey additions run $2,500 to $5,000+, plus separate trade permits for HVAC, plumbing, and electrical scopes. Ottawa and municipalities using the valuation model calculate the same permit at roughly $11.00 per $1,000 of declared construction value, with a $117 minimum.
2. What municipal surcharge applies to a Toronto building permit?
Toronto applies two mandatory surcharges on top of its base permit fee: a Building Code Act administration charge of 4.5% of the base permit and a Toronto Construction Surcharge of $3.00 per square metre. These add roughly 6 to 10% to the listed base total. The City’s 2026 minimum fee for any permitted work is $214.79, regardless of project size or scope.
3. Are development charges included in the building permit cost in Ontario?
No. Development charges and building permit fees are separate costs payable at the same time but billed differently. Permit fees cover plan review and inspections. Development charges fund roads, water, sewer, and parks. In high-growth GTA municipalities, DCs can be 5 to 20 times larger than the permit fee itself, making them the larger budget item by far.
4. How long does a building permit last in Ontario, and what are permit renewal fees?
Ontario building permits require construction to begin within six months of issuance. If work starts but then stops for six months or more, the permit may lapse. Permit renewal fees vary by municipality. Some charge nothing; Toronto charges based on project complexity and the number of prior extensions already requested. A fully expired permit requires a new application under the current code.
5. Can I get a refund if I cancel my Ontario building permit application?
Partial refunds are available in most Ontario municipalities before significant review work is completed. Typically 80 to 90% is refundable early in the process, dropping to around 50% once detailed technical review begins, and nothing is returned after the permit is issued. Ottawa specifies that fees are non-refundable once active review has started. Always verify the refund schedule in your municipality’s permit bylaw.
Conclusion
The building permit cost in Ontario is one line item in a larger permit-stage budget. The permit fee covers plan review and inspections. Development charges, trade permits, mandatory surcharges, and permit renewal fees arrive alongside it on the same invoice. Budget all four before you apply. Leedway Group manages custom homes, additions, and renovations across the GTA and walks every client through the full permit cost picture before the project reaches the application stage. Contact us to get started.
