Understanding Permit Requirements For Decks

In Ontario, whether you need a building permit for a deck depends on factors like its size, height, attachment to your home, and local zoning by-laws.

Permits for decks in Ontario are typically required for:

• Attached Decks: Any deck attached to your house, regardless of size or height, requires a permit.
• Elevated Decks: Decks more than 600 mm (24 inches) above grade, even if detached, typically require a permit.
• Size Considerations: Decks over 10 m² (approximately 108 square feet) often require a permit, especially if elevated.

If a permit is needed, you'll typically need to submit:

• Site Plan: Showing property lines, existing structures, and proposed deck location.
• Construction Drawings: Including dimensions, materials, and structural details.

Regardless of permit requirements, all decks must adhere to local zoning by-laws, including setbacks from property lines and height restrictions. Additionally, safety features like guards and railings are mandated for decks above certain heights.