Permits are handled locally
Ontario’s Building Code framework is enforced mainly by municipal building departments. Requirements depend on the project, property, applicable law, and municipality.
Ask before work begins
Contact the local building department with a clear scope. They can explain the drawings, forms, fees, inspections, and other approvals that may apply.
- Structural or layout changes
- Changes to plumbing, mechanical, or electrical systems
- Additions, demolition, or changes of use
- Heritage, zoning, conservation, or other applicable approvals
Keep responsibilities in writing
Document who prepares drawings, applies for permits, books inspections, responds to deficiencies, and retains the approved documents. This guide is general information, not legal or engineering advice.
Official sources
Requirements can change. Use these primary sources and confirm details for your property and municipality.