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 whether the deck is attached
- Measure area and height above adjacent grade
- Identify whether it is covered or associated with a door
- Check zoning and prepare the application if a trigger applies
Official sources behind this page
Attached deckPermit required at any size
Hamilton requires a building permit for any deck or porch attached to a building.
City of HamiltonPorches and Decks · Permit triggers, zoning and submission checklist
2026-10-01Open proof
Detached uncovered deckPermit can be required based on area and height
Hamilton lists a permit trigger for a detached uncovered deck over 10 m² and more than 200 mm above adjacent grade.
City of HamiltonPorches and Decks · Permit triggers, zoning and submission checklist
2026-10-01Open proof
ZoningStill applies
Hamilton states that porches and decks must meet zoning requirements even where a building permit is not required.
City of HamiltonPorches and Decks · Permit triggers, zoning and submission checklist
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 deck guide