How Much Does a Building Permit Cost in Ontario? (2026)

June 11, 2026

How Much Does a Building Permit Cost in Ontario? (2026 Guide)

If you are planning a renovation, an addition, a new home, or a basement apartment in Ontario, one of the first questions on your mind is simple: what will the building permit actually cost? The honest answer is that there is no single province-wide price — but there is a clear, predictable way the fees are calculated once you understand the system.

This guide breaks down exactly how building permit costs work in Ontario in 2026, what affects the price, and the extra charges most homeowners forget to budget for.

What a Building Permit Fee Actually Pays For

A building permit is your municipality’s official approval that your project meets the Ontario Building Code and local zoning rules. The fee you pay covers the city’s work: reviewing your drawings, examining the application, and inspecting the construction at each stage.

Because that work is done by your local municipality, each city sets its own fee schedule. Two identical projects — one in Toronto and one in Hamilton — can have different permit costs simply because the cities calculate fees differently.

The Two Ways Ontario Cities Calculate Permit Fees

Almost every municipality uses one of two methods:

1. By floor area (per square metre / square foot) Cities like Toronto charge a set rate for every square metre of construction, based on the type of building. For 2026, Toronto applies a minimum permit fee of roughly $215 for any work, with an hourly examination and inspection rate of about $93 where applicable.

2. By construction value (a percentage of the project cost) Other municipalities calculate the fee as a percentage of your project’s estimated construction value. The higher your declared build cost, the higher the permit fee.

Before you apply, check which method your city uses — it changes how you should estimate your budget.

Typical Building Permit Cost Ranges in Ontario (2026)

Exact numbers vary by city, but here are realistic ballpark ranges to help you plan:

Project Type	Typical Permit Fee Range (2026)
Deck, small accessory structure	$200 – $600
Basement apartment / second unit	$800 – $2,500
Interior renovation / alteration	$500 – $2,000
Home addition	$1,500 – $4,000
New custom home	$5,000 – $8,000+
Commercial fit-up	$2,000 – $10,000+

These are permit fees only. They do not include development charges, professional design fees, or other approvals — covered below.

The Cost Most People Forget: Development Charges

Here is where budgets get derailed. Development charges (DCs) are separate from your permit fee and are often far larger. They fund roads, water, and infrastructure, and they apply mainly to new units.

For a new single-family home in the GTA, development charges can run anywhere from tens of thousands of dollars upward, depending on the municipality. Some regions have introduced temporary relief — for example, Peel Region has a temporary reduction on development charges running into late 2026, which can save tens of thousands on a new home.

Good news for second units: Under provincial housing legislation (Bill 23), creating a secondary suite — like a legal basement apartment — in an existing home is generally exempt from development charges. That makes second units one of the most cost-effective ways to add housing value.

Other Costs to Budget Alongside the Permit

A building permit is rarely the only line item. Plan for:

BCIN-certified design drawings — most permit applications require plans prepared by a qualified designer holding a Building Code Identification Number.
Zoning certificate or compliance review — some cities charge a separate fee.
Sub-permits — plumbing, electrical (ESA), HVAC, and mechanical work often need their own approvals.
Committee of Adjustment / minor variance — if your project needs zoning relief, expect added application fees and time.

When you add these together, the permit is often a small slice of your total approval cost.

Can You Get a Refund If You Cancel?

In most Ontario municipalities, yes — partially. If you withdraw your application early, a large portion (often 80–90%) may be refundable. Once the city begins its review, that drops sharply, and after the permit is issued, refunds are usually unavailable. Always check your municipality’s specific refund policy in their permit bylaw.

How to Keep Your Permit Costs Predictable

The single biggest cause of unexpected costs is a rejected application. When drawings are incomplete or non-compliant, the file gets sent back — adding weeks of delay and sometimes additional review fees. A clean, complete, code-compliant submission the first time is the cheapest path through the process.

This is exactly where working with an experienced building permit and design firm pays for itself: accurate drawings, correct fee estimates up front, and a submission built to pass review the first time.

Frequently Asked Questions

How much does a building permit cost in Ontario?

It depends on your municipality and project. Most cities calculate the fee either by floor area (per square metre) or as a percentage of construction value. A small project may cost a few hundred dollars, while a new custom home can reach $5,000–$8,000 or more in permit fees alone, separate from development charges.

Are development charges included in the building permit fee?

No. Development charges are separate and are usually much larger than the permit fee itself. They apply mainly to new dwelling units and are paid before the permit is issued.

Do I need to pay development charges for a basement apartment?

Generally no. Under Ontario’s Bill 23, creating a secondary suite such as a legal basement apartment in an existing home is typically exempt from development charges.

When do I pay the building permit fee?

In most Ontario municipalities, the permit fee is paid at the time of application, before the permit is issued. Development charges are usually collected at the same stage.

Can I avoid permit costs by skipping the permit?

No — and it is risky. Building without a required permit can lead to stop-work orders, fines, problems with insurance, and trouble when you sell. The cost of legalizing unpermitted work after the fact is almost always higher.

Plan Your Project With Accurate Numbers

Understanding your true permit budget — fees, development charges, design, and sub-permits — before you start is the key to avoiding surprises. If you are planning a project anywhere in the Greater Toronto Area, ITI Building Permit Designer Inc. provides BCIN-certified drawings, accurate fee guidance, and full permit management — so your application moves through review cleanly the first time.

📞 Call 647-973-1733 or visit iTi Building Permit Designer for a free consultation.