Dallas allows ADUs in single-family zones with reasonable setbacks and size limits. The city is moderately ADU-friendly, with a growing interest in infill housing. Permitting is straightforward but requires close attention to lot coverage limits.
Zoning & Size Requirements
| Allowed Zones | Single-family residential (SF) |
| Max Size (Detached) | 900 sq ft |
| Max Size (Attached) | 700 sq ft |
| Max Size (JADU) | 400 sq ft |
| Max Height | 35 feet |
| Max Units | 1 ADU per lot |
Setback Requirements
| Rear Setback | 15 feet |
| Side Setback | 5 feet |
| Front Setback | 20 feet |
| Parking Required | 1 space per primary unit + 1 for ADU |
| Owner Occupancy | Not required |
| Min Lot Size | 5,500 sq ft |
Permit Process & Fees
| Approval Process | Building permit application |
| Review Timeline | 50-75 days |
| Permit Fees | $2,200-$3,800 |
| Impact Fees | $900-$1,600 |
| Plan Check | 2-3 weeks |
| Pre-Approved Plans | Available for detached ADUs |
Get Free ADU Quotes in Dallas
Connect with pre-vetted ADU contractors in your area. Free, no obligation.
🔒 Your info is secure. We connect you with up to 3 vetted local contractors. No spam, no obligation.
Construction Costs
| Average Build Cost | $115,000-$230,000 |
| Cost per Sq Ft | $130-$250 |
| Garage Conversion | $55,000-$135,000 |
| Prefab ADU (Installed) | $80,000-$185,000 (installed) |
Finance Your ADU Project
Most ADU projects are funded through HELOCs, construction loans, or cash-out refinancing. Compare rates from top lenders in minutes.
Compare ADU Financing Options →Rental Income Potential
| Avg Rent (1 Bedroom) | $1,150-$1,700/mo |
| Avg Rent (2 Bedroom) | $1,450-$2,200/mo |
| Short-Term Rental | Not permitted in most areas |
| Est. Annual ROI | 6-8% annual return |
Explore Prefab ADU Options
Prefab ADUs can save 20-40% vs. traditional construction and cut build time in half. Compare top prefab manufacturers.
Compare Prefab ADUs →Recent Law Changes
What's Changed Recently
- 2023: Increased max attached ADU size from 600 to 700 sq ft
- 2024: Introduced pre-approved ADU plan library
- 2023: Reduced minimum lot size from 6,000 to 5,500 sq ft
- 2024: Added provisions for detached ADUs on corner lots
Tips for Building an ADU in Dallas
- Dallas requires lot coverage analysis; even small lots often qualify for ADUs
- Short-term rental restrictions are strict; plan for long-term tenants
- Tree preservation codes can affect placement; consult arborist early
- Deed restrictions are common in Dallas; check HOA rules before investing
Frequently Asked Questions
Can I build an ADU in Dallas?
Yes. ADUs are allowed in Single-family residential (SF) in Dallas. The maximum size for a detached ADU is 900 sq ft. No owner-occupancy is required.
How much does an ADU cost in Dallas?
ADU construction in Dallas typically costs $115,000-$230,000. Garage conversions run $55,000-$135,000, and prefab ADUs cost $80,000-$185,000 (installed).
How much can I rent an ADU for in Dallas?
Average ADU rents in Dallas are $1,150-$1,700/mo for a 1-bedroom and $1,450-$2,200/mo for a 2-bedroom unit.
Do I need parking for an ADU in Dallas?
1 space per primary unit + 1 for ADU. Check with Dallas planning department for the latest Texas ADU parking rules, as many states have relaxed requirements in recent years.
How long does it take to get an ADU permit in Dallas?
The permit review timeline in Dallas is 50-75 days. Fees range from $2,200-$3,800.
Ready to Build in Dallas?
Get free, no-obligation quotes from top-rated ADU contractors in Dallas.
Get Free Quotes →