Niagara Deck Inspection Guide in Niagara Region, Ontario

Every deck permit issued in Niagara comes with the same three required inspections under the Ontario Building Code's Part 9, regardless of which of the four municipalities issued it: footing (or excavation), framing, and final. Niagara Falls' own building department states the first one directly: the footing inspection happens prior to pouring of concrete. St. Catharines' own Guide to Residential Decks and Porches lists the identical order: before pouring concrete for piers or footings, then framing, then final. The order is the whole point. Once concrete covers a footing, or deck boards cover the frame underneath, an inspector can no longer see what is actually down there. The single most common reason a deck does not pass on the first attempt is not a design mistake. It is a timing one: pouring the footing, or decking over the frame, before the inspector has actually seen that stage. Cover it first, and the usual result is digging the footing back out, or pulling boards back up, so the inspector can verify what is underneath. Book each inspection with enough notice for your municipality (Niagara-on-the-Lake asks for at least 48 hours), and wait for the pass before moving to the next stage. What each inspection is actually checking: at footing or excavation, depth, placement, and that the footing sits on undisturbed soil, before it disappears under concrete. Ontario's Building Code does not publish one fixed number for how deep that footing has to go; none of the four Niagara municipalities' own permit pages state a specific footing depth either, which is exactly why this is confirmed with your building department at permit stage rather than assumed from a number found online (see our permit guide for what each municipality does publish). At framing, the structural connections: ledger board attachment and flashing where the deck meets the house, joist hangers, beam bearing, all of it checked before the deck boards go down and hide it for good. At final, the completed guards, railings, baluster or guard-opening spacing, and stairs, checked against your municipality's approved drawings and the current Ontario Building Code. Ontario moved to a new Building Code edition (O. Reg. 163/24) on January 1, 2025, so a guard-height or spacing figure you find in an older article or a generic online source may not be the current one. Confirm the current figure with your municipality's building department at permit stage rather than build to a number you found somewhere else. Niagara Falls, St. Catharines, Niagara-on-the-Lake, and Welland each administer their own building department and book inspections their own way, but the three-inspection sequence itself, and the reason it is sequenced the way it is, comes from the province-wide Building Code, not a municipal choice.