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
- Define the basement rooms and use
- Identify plumbing and structural work
- Prepare the floor plans
- Use the ADU permit route if another dwelling unit is proposed
Official sources behind this page
Whitby lists finished basements among typical projects that require a building permit.
Whitby accepts this as a dedicated E-Portal building permit application type.
Whitby separately lists Additional Dwelling Units as a distinct permit type.
Need the full project answer?
The main guide keeps the permit trigger, zoning questions, documents, fees, timing and next steps together.
Open the basement renovation guide