Ontario municipalities
- A permit is required when an attached deck's walking surface is more than 600 mm above grade. Some municipalities require one for any attached deck.
- Freestanding decks over 10 m² (108 sq ft) and more than 600 mm high generally need a permit.
- Footings at least 1.2 m below grade.
- Guards: 900 mm above 600 mm, 1,070 mm above 1.8 m, with openings under 100 mm.
- Decks can't be attached to brick veneer.
- Request utility locates through Ontario One Call before digging.
