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🪵 Deck / Porch permit checklist

An attached or freestanding outdoor platform, usually wood or composite, elevated above grade or at grade level. Print this sheet and take it to your building department.

Typical requirement. Across 50 states we reviewed, about 100% require a permit for deck / porch (verdict: conditional; typical go / no-go: allowed). Common exemption: Decks ≤30 in above adjacent grade are exempt under IRC R105.2. Your city or county sets the exact rule — confirm with the permit checker.

For your specific project, use the permit checker, then open your county permit portal to start the application.

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