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Deck building costs in Toronto, ON typically range from 11,000 to 24,000, depending on the deck's size, material selection, and structural complexity. ON building codes and local permit requirements—especially regarding frost depth, snow load ratings, and railing specifications—significantly impact labor time and material specifications. The final price also reflects whether your deck requires structural modifications to your home's rim board, additional foundation work, or integration with existing landscaping features.
Most deck projects require a building permit from the City of Toronto. However, certain detached deck installations may be exempt from this requirement. To determine whether your specific project needs a permit, you should consult with the city or use Toronto Building's online Express portal to verify your situation before proceeding.
Your submission must include scaled drawings on standard-sized sheets that are fully dimensioned and dated. You'll need to provide detailed specifications covering footing construction, column and beam locations and dimensions, stair details with tread measurements and headroom clearances, and guard specifications addressing safety openings and climbability. A site plan showing your property boundaries, existing structures, setbacks to neighboring properties, zoning information, and parking or landscape features is also required. All materials must be submitted as PDF files. If a professional engineer or qualified designer prepared your drawings, additional credential documentation and responsibility forms are necessary.
As of January 1, 2026, the permit fee for residential decks, porches, and carports is $214.79. You can submit your application and pay this fee through Toronto Building's online Express web portal.