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🛖 Shed / Outbuilding permit checklist

A detached, non-habitable outbuilding for storage, workshop, or studio use. Print this sheet and take it to your building department.

Typical requirement. Across 20 states we reviewed, about 100% require a permit for shed / outbuilding (verdict: conditional; typical go / no-go: allowed). Common exemption: One-story detached accessory structure ≤120 sq ft is exempt (CBC 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.