Backyard project permits in Austin, TX
Austin follows the model 200 sq ft shed rule with one big exception: inside a flood hazard area, every exemption disappears.
Rules last checked by a person on October 19, 2026. Guidance only; confirm with Austin before you build.
| Typical project | Permit? |
|---|---|
| Shed10 by 12 ft shed, 10 ft tall, no power | No: no permit as described |
| Deck160 sq ft freestanding deck, 24 in high | No: no permit as described |
| Fence6 ft wood fence in the back yard | No: no permit as described |
| Garage24 by 20 ft detached garage with lights | Yes: Building permit, Electrical permitConfidence: medium |
| ADU650 sq ft detached backyard cottage | Yes: Building permit, Zoning reviewConfidence: medium |
Check your exact lot
Permit office
City of Austin building technical codes (2024 IRC family) and Land Development Code Title 25 with the HOME amendments.
- Austin Build + Connect (AB+C)
- Work exempt from building permits
- City and Land Development Code
- Phone: 311 (512-974-2000)