In most GTA municipalities, a building permit is required for decks that are more than 600mm (approximately 24 inches) above grade, that are attached to the house, or that exceed a certain square footage threshold. Permit requirements vary by municipality, Toronto, Mississauga, Brampton, and other GTA cities each have their own thresholds. We assess permit requirements for every deck project during the consultation and manage all permit applications in-house where required. Building a deck without a required permit creates complications at resale, insurance claims, and any future permit application on the property.