Travis County • Permissiveness Score: 97/100
Austin, TX ADU Zoning Rules & Regulations
Austin’s Phase 1 & 2 HOME (Home Options for Middle-Income Economy) initiative allows up to 3 residential units on any single-family lot and dramatically reduced minimum lot sizes to 1,800 sq ft.
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Key Zoning Parameters for Austin
Verified 2026 Max Detached Size 1,100 sq ft
Max Attached Size 1100
Rear & Side Setbacks 5 ft rear / 5 ft side
Front Setback 15 - 25 feet depending on base zoning
Max Height Limit 30 feet (2.5 stories)
Owner Occupancy Not Required (Waived) Austin does not require owner occupancy for secondary dwelling units.
Parking Requirements Exempt Austin eliminated parking minimums citywide under the HOME initiative.
Junior ADU (JADU) Not recognized
Short Term Rentals (Airbnb) Allowed with permit Type 1 (owner occupied) and Type 2 (non-owner occupied, subject to neighborhood caps).
Estimated Permit Fees $2,200 - $5,800
Avg Review Timeline 4 - 9 weeks
Fire Sprinklers Typically not required for detached ADUs under 1,100 sq ft unless water access is obstructed.
Governing Ordinances & State Laws
- ✓ Austin Land Development Code (HOME Initiative Phase 1 & 2)
- ✓ City of Austin Ord. No. 20231207-001
Austin ADU Frequently Asked Questions
Can I build two detached units in my Austin backyard?
Yes! Under the HOME initiative, most single-family lots (SF-1, SF-2, SF-3) can now feature up to 3 units total.
Do I have to provide a driveway or carport for my Austin ADU?
No, Austin eliminated minimum parking requirements citywide.
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