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
- Confirm ARU type and property zoning
- Plan parking and entrances
- Prepare the complete drawing set
- Submit the building permit application
Official sources behind this page
ARUBuilding permit required
Waterloo states that a building permit is required to add an additional unit to a home.
City of WaterlooBuild an ARU on the main floor or basement · ARU building permit, zoning and drawing requirements
2026-10-01Open proof
ZoningConfirm setbacks, parking and driveway dimensions
The ARU process directs applicants to confirm zoning and planning rules before applying.
City of WaterlooBuild an ARU on the main floor or basement · ARU building permit, zoning and drawing requirements
2026-10-01Open proof
DrawingsExisting and proposed construction required
The City’s ARU checklist requires site and floor plans showing property, parking and unit entrances.
City of WaterlooBuild an ARU on the main floor or basement · ARU building permit, zoning and drawing requirements
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 additional residential unit guide