Not every renovation in Ontario requires a building permit, but many do - and skipping a required permit can lead to serious consequences including fines, insurance issues, and problems when selling your home. This guide helps you understand which projects need permits and which don't.
Renovations That Require a Permit
- Structural changes - removing or modifying load bearing walls
- Adding or removing rooms, changing the layout
- Basement conversions to living space or legal apartments
- Home additions of any size
- New windows or doors in exterior walls (changing openings)
- Plumbing relocation - moving sinks, toilets, or adding new fixtures
- Electrical panel upgrades or new circuits
- HVAC system changes or ductwork modifications
- Decks over 600mm above grade or attached to the house
- Finishing an unfinished basement
- Converting a garage to living space
Renovations That Typically Don't Need a Permit
- Cosmetic updates - painting, flooring, trim, wallpaper
- Cabinet replacement in the same layout
- Fixture replacement in the same location (faucets, light fixtures)
- Drywall repair and patching
- Fencing under municipal height limits
- Landscaping and hardscaping
- Replacing doors and windows in existing openings (same size)
Ready to start your project?
Ontario Design Studio delivers BCIN-certified, OBC-compliant building permit drawings across Ontario and the GTA. Call 416-558-9607 or request your free quote.
What If I've Already Done Work Without a Permit?
If you've discovered unpermitted work on your property, read our guide on how to legalize unpermitted work in Ontario.
Related Resources
- Interior Renovation Permit Drawings
- Building Permit Drawing Cost Guide
- How the Ontario Permit Process Works
- Home Addition Permit Checklist
Frequently Asked Questions
Do I need a permit to renovate my kitchen in Ontario?
It depends on the scope. If you're replacing cabinets and countertops in the same layout, no permit is needed. But if you're relocating plumbing, removing walls, or changing the electrical panel, a building permit is required.
What happens if I renovate without a permit in Ontario?
Renovating without a required permit can result in fines, stop-work orders, difficulty selling your home, insurance claim denials, and the requirement to retroactively obtain a permit (which may involve opening walls for inspection). Learn how to legalize unpermitted work.