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
- Write the exact basement scope
- Separate finishes from plumbing, structural changes and new dwelling-unit work
- Prepare the project-specific drawings
- Submit through Mississauga’s current ePlans process
Official sources behind this page
Basement finishingPermit required
Mississauga lists finishing a basement to create rooms or living space among projects that require a building permit.
City of MississaugaWhen a building permit is required · Permit-required and permit-exempt project examples
2026-10-01Open proof
Basement apartmentUse the ARU conversion route
Creating another dwelling unit uses a project-specific additional residential unit conversion checklist.
City of MississaugaAdditional residential unit conversions · Second, third and fourth unit conversion documents
2026-10-01Open proof
DrawingsProject-specific documents are required
Mississauga publishes separate residential document requirements for finish-basement applications.
City of MississaugaDrawings and documents you need for a building permit · Residential project document categories
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