Do I Need a Building Permit in Toronto?
The short answer: if you're changing the structure, adding plumbing, or doing electrical work, you probably do. Here's the complete breakdown.
The Golden Rule
If you're unsure, assume you need a permit. Building without one can result in fines up to $100,000, stop-work orders, and having to tear down completed work. When in doubt, call 311 or check with Toronto Building.
Work That REQUIRES a Permit
Under the Ontario Building Code, you need a permit for any work that affects the structure, safety systems, or use of a building. This includes:
Structural Changes
- Removing or modifying load-bearing walls
- Adding rooms or additions
- Building a deck (attached or detached)
- Installing a new garage or carport
- Basement underpinning or lowering
- Foundation repairs
Mechanical, Electrical & Plumbing
- Installing or relocating plumbing
- New electrical circuits or panel upgrades
- HVAC system installation or replacement
- Adding a bathroom or kitchen
- Installing a fireplace or wood stove
- Water heater replacement (some cases)
Other Permit-Required Work
- Basement apartments / secondary suites
- Finishing or renovating a basement
- Installing an in-ground pool
- Changing a building's use
- Demolition
- New window or door openings
Ready to apply? See our step-by-step guide to getting a building permit or check if you qualify for the 3-day Express permit stream.
Work That Does NOT Require a Permit
Cosmetic and maintenance work generally doesn't require a permit. This includes:
Gray Areas and Common Questions
"I'm just removing a wall..."
If it's a load-bearing wall, you need a permit and structural engineering. If it's a non-load-bearing partition wall with no electrical or plumbing, you may not need one. When in doubt, consult a professional.
"I'm finishing my own basement..."
Yes, you need a permit. Basement finishing involves electrical, possibly plumbing, and fire safety requirements (egress windows, smoke detectors). See our basement guide for full requirements and costs.
"I'm replacing my furnace..."
Usually yes. HVAC replacements typically require a permit in Toronto. Your HVAC contractor should handle this.
"I'm building a small shed..."
Sheds under 10 square meters (about 108 sq ft) without plumbing or electrical don't require a building permit, but check zoning setback requirements. Larger sheds need a permit.
"I'm installing a hot tub..."
Above-ground hot tubs generally don't need a building permit, but you'll need an electrical permit for the wiring. Built-in or in-ground installations require permits.
Consequences of Building Without a Permit
- 1.Fines: Up to $100,000 for individuals, $500,000 for corporations, plus daily fines.
- 2.Stop-Work Orders: The city can halt all construction immediately.
- 3.Demolition: You may be ordered to tear down unpermitted work at your expense.
- 4.Insurance Issues: Damage from unpermitted work may not be covered.
- 5.Sale Problems: Unpermitted work must be disclosed and can kill deals or reduce offers.
Check What's Been Approved Nearby
See what permits your neighbors have pulled for similar projects.