Are permits required for major renovations in
Ontario?
Do you REALLY need a permit for major renovations in Ontario? You might be shocked by how costly ‘skip and hope’ can be.
Quick answer
Yes. Major renovations in Ontario almost always require a building permit. If your project changes structure, plumbing, electrical, load-bearing walls, or the use of space, you need a permit and inspections under the Ontario Building Code and local municipal bylaws.
Which projects need permits
- Structural changes: removing or adding load-bearing walls, new openings, adding floors.
- Major mechanical, electrical, or plumbing work.
- Adding or changing living space (basement conversions, attic bedrooms).
- New additions, garages, decks above a certain height.
- Projects that change occupancy or use of a space.
Minor cosmetic work often doesn’t need permits (paint, trim, cabinet replacement). But when in doubt, check with your municipality.
Why getting the permit matters now
Permits protect you. They force code-compliant work, require inspections, and create a legal record. That protects your family, your wallet, and your future sale value. Skipping permits saves time now and risks thousands later.
Real consequences of skipping permits
- Fines and orders to stop work from the municipality.
- Mandatory removal or rework to meet code—costly and slow.
- Insurance claims denied after unpermitted work causes damage.
- Lower resale value or failed sales due to issues revealed in home inspection.
- Mortgage or refinancing complications when lenders require permits or compliance certificates.
How to get permits without the headache
- Start at your local municipal building department. Ask for the permit checklist.
- Hire licensed trades for electrical, plumbing, HVAC—inspections are tied to licensed work.
- Submit drawings that show structural changes and materials.
- Schedule required inspections at each stage. Don’t hide work until the end.
Why a local expert matters
A local real estate and renovation specialist can quickly tell you what requires a permit and what doesn’t. They speed up approvals, connect you to reliable contractors, and protect your sale value. Tony Sousa has guided dozens of Ontario homeowners through permit processes, inspections, and resale with unpermitted-work avoided or fixed fast.
Next steps (simple, immediate)
- Photograph your planned work.
- Contact your municipality’s building department for a pre-application review.
- Call or email for a fast reality check and local contractor referrals: tony@sousasells.ca | 416-477-2620 | https://www.sousasells.ca
Permits are paperwork with teeth. Treat them as protection, not red tape. Do the job right now, or pay more later. Contact an expert and avoid costly mistakes.
Disclaimer: This post provides general information. For specific legal or technical advice, consult your municipality or a licensed professional.
