Project template
Your preparation checklist
Use it as a working list. The final submission still needs to match your actual scope and the City’s current requirements.
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What to do next
- Check zoning feasibility before detailed design
- Confirm site constraints
- Engage the right design professional
- Prepare a complete permit package
Official sources behind this page
Toronto lists construction of an addition to an existing building among projects that require a building permit.
Setbacks, height, lot coverage and other controls can determine feasibility.
Foundation, framing and connections need compliant design.
Need the full project answer?
The main guide keeps the permit trigger, zoning questions, documents, fees, timing and next steps together.
Open the home addition guide