Dallas ADU Permits & Requirements
Fees $1,100–$5,500 · 10–20 weeks timeline · Up to 800 sf
Quick Answer
Dallas ADUs: $150K–$300K
Permits: $1,100–$5,500 · Updated April 2026
Permit Fees Breakdown
| Fee Type | Cost |
|---|---|
| Board of Adjustment (BOA) Application | $600 |
| Building Permit | $500–$4,000 |
| Plan Review | $200–$800 |
| Utility Connections | $500–$1,500 |
Permit Process Timeline
Feasibility & BOA Research
1–2 weeksDetermine if Board of Adjustment approval is needed for your zone
BOA Application (if required)
2–4 monthsBoard of Adjustment review — the longest step in Dallas
Plan Preparation
2–4 weeksArchitectural plans meeting Dallas building codes
Building Permit Review
10–15 business daysCity plan review for code compliance
Construction
3–6 monthsBuild phase with required inspections
Final Inspection & CO
1–2 weeksFinal inspection and Certificate of Occupancy
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Zoning & Requirements
Max ADU Size
800 sf
Height Limit
24 ft
Setbacks
5 ft side/rear
Parking
1 off-street space
Key Regulations
- Dallas calls ADUs 'accessory living quarters' — use this terminology on applications
- Many zones require Board of Adjustment (BOA) approval — adds 2–4 months to timeline
- Max ADU size: 800 sf in most Dallas residential zones
- Garage apartments may have different size/height allowances
- No owner-occupancy requirement — ADUs can be investment properties
- Dallas is expanding ADU allowances under the Forward Dallas plan — rules may become more permissive
Climate & Construction Notes
DFW's hail season (March–May) makes impact-resistant roofing and materials worthwhile. High-efficiency HVAC is critical for 100°F+ summer days. Drought-resistant landscaping saves on water costs.
Frequently Asked Questions
How long does it take to get an ADU permit in Dallas?
The typical permit timeline is 10–20 weeks from application to approval. Total project time including design and construction is usually 6–12 months.
What types of ADUs are allowed in Dallas?
Dallas allows detached, attached, garage conversion. Maximum size is 800 sf with a height limit of 24 ft.
Do I need to live on the property to build an ADU in Dallas?
No. Check with Dallas's planning department for the most current requirements.
More Dallas ADU Resources
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