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
- Prepare the site and building drawings
- Assemble the City forms
- Submit the complete addition package through ePlans
Official sources behind this page
Permit packageDedicated addition submission required
Mississauga publishes a project-specific building permit checklist for residential additions.
City of MississaugaAddition · Residential addition forms, site plan and drawings
2026-10-01Open proof
Site planRequired
The site plan includes property information, existing structures, proposed construction and site statistics.
City of MississaugaAddition · Residential addition forms, site plan and drawings
2026-10-01Open proof
ElevationsRequired for each side
The City asks for existing and proposed work, grade, floor levels, dimensions, windows, doors and roof information.
City of MississaugaAddition · Residential addition forms, site plan and drawings
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 home addition guide