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 scope
- Identify walls, insulation, plumbing and use changes
- Prepare drawings
- Use the ARU route instead if another dwelling unit is being created
Official sources behind this page
Finish unfinished basementPermit required
Waterloo lists finishing an unfinished space such as a basement as work that typically needs a building permit.
City of WaterlooInterior renovations and basements · Basement and interior renovation permit triggers
2026-10-01Open proof
Walls / structure / insulationPermit required
Adding or removing walls, changing insulation or making structural changes are listed permit triggers.
City of WaterlooInterior renovations and basements · Basement and interior renovation permit triggers
2026-10-01Open proof
Plumbing / change of usePermit required
Adding/changing plumbing or changing how the space is used are also listed permit triggers.
City of WaterlooInterior renovations and basements · Basement and interior renovation permit triggers
2026-10-01Open proof
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