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 new dwelling unit and shared areas
- Check property eligibility
- Prepare the permit drawings
- Submit through Kitchener’s residential permit process
Official sources behind this page
Additional dwelling unitPermit required
Kitchener states that adding a duplex requires a building permit and includes in-law suites, accessory apartments and granny flats in that route.
City of KitchenerResidential building permits · Decks, sheds, garages, basements, additions and duplex/granny-flat permits
2026-10-01Open proof
Project typeSeparate from finishes-only basement work
The City publishes a dedicated duplex process rather than treating the project as ordinary basement finishing.
City of KitchenerResidential building permits · Decks, sheds, garages, basements, additions and duplex/granny-flat permits
2026-10-01Open proof
Zoning / designConfirm before construction
The dwelling-unit configuration and property must meet the applicable municipal and Building Code requirements.
City of KitchenerResidential building permits · Decks, sheds, garages, basements, additions and duplex/granny-flat permits
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 duplex / granny flat guide