A residential deck permit is typically required in Ontario when building a new deck or modifying an existing one, especially if the structure is attached to a house or raised above a certain height.
In general, a permit is needed if the deck:
- Is attached to the house
- Is more than 600 mm (about 24 inches) above ground
- Includes structural elements like footings, beams, guards, or stairs
The permit ensures the deck complies with the Ontario Building Code, including requirements for structural safety, proper foundations (frost protection), guard heights, and load capacity.
To apply, you typically need:
- Detailed construction drawings (plans, elevations, framing details)
- Site plan showing location on the property
- Zoning compliance review (setbacks, lot coverage)
Getting a permit helps ensure your deck is safe, legal, and avoids issues during resale or inspections.
