Austin exempts a one-story detached accessory structure from a building permit when it is 200 square feet or smaller, 15 feet or lower, has no plumbing, is not used as a dwelling, and is outside a flood-hazard area.
Zoning, setbacks, easements, electrical work, floodplain review, impervious-cover limits, historic review, and deed restrictions can still apply.
What this tells youComputed rule answer
How precise this isComputed rule answer
Official data checkedAustin work exempt from building permits
Next stepCheck the official shed/accessory-structure rules with your project dimensions.
Building-permit exemptionOne story; detached; 200 sq ft or smaller; 15 ft or lower; no plumbing; no dwelling use; outside flood hazard
Permit review requiredIf any exemption condition is not met
Still verifyZoning, placement, utilities, floodplain, impervious cover, historic status, and easements