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If the deck is adjacent to or attached to the house and its walking surface is more than 600 mm (24 in.) above the adjacent grade, a permit is required;
A building permit is also required for an elevated deck providing principal access to a building.
If the deck is independent from the house (eg. is in the middle of the yard) and has a walking surface greater than 10 square metres (approximately 108 square feet) in area and its walking surface is more than 600 mm (24 in.) above the adjacent grade, a permit is required.
