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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 20 states we reviewed, about 100% require a permit for deck / porch (verdict: conditional; typical go / no-go: allowed). Common exemption: Decks ≤200 sq ft, ≤30 in above grade, not attached, not serving a required exit are exempt. 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.