Shed Permit requirements across Illinois
By Mario Bailey Last verified 2026-06-17
Requirements and size thresholds for shed permits vary by locality. The table below compares what each Illinois county or city requires. Always confirm with the local office before starting.
| Locality | Permit required? | Typical threshold |
|---|---|---|
| Chicago | Conditional | single-story detached tool or storage shed under 150 sq ft and not more than 15 ft tall with no plumbing does not require a permit |