Fort Worth permits accessory dwelling units (ADUs) as an accessory use in one-family ('A' through 'AR') residential districts under Zoning Ordinance §5.301. Unlike California-style ADUs, a Fort Worth ADU cannot be operated as a separate, independent residence — it is a habitable accessory structure tied to the main owner-occupied home. Texas has no statewide ADU mandate, so Fort Worth's local zoning controls. A building permit is required for every ADU, and there is no by-right state preemption forcing approval.
Accessory Dwelling Units in Fort Worth: What's Allowed
Fort Worth regulates the accessory dwelling unit (ADU) under Zoning Ordinance §5.301, Accessory Uses on Residential Lots. Texas has no statewide ADU law, so unlike California cities there is no by-right mandate or 60-day deemed approval — Fort Worth's local zoning controls, and every ADU needs a building permit from Development Services.
Do I need a permit for an ADU in Fort Worth? Yes. A detached ADU, an attached ADU, and a garage conversion all require a building permit, plus a site plan showing the unit's footprint, setbacks, and parking. There is no exemption that lets you skip the permit. You can reach Development Services at (817) 392-2222.
The key restriction: in one-family ('A' through 'AR') districts, an ADU under §5.301 may not be operated as a separate, independent residence. It is a habitable accessory structure tied to your owner-occupied main home — suitable for family, a guest suite, or a home office/studio. If your goal is a stand-alone rental to an unrelated household, confirm the allowed use with the Zoning division first, because that is not permitted by-right under the current ordinance.
Detached ADU in Fort Worth: a detached unit is capped at 1,000 sq ft, must observe the side and rear setbacks of your underlying zoning district, and cannot exceed the height of your primary residence. Pull your lot's district (A-5, A-7.5, A-10, etc.) before designing — dimensional standards vary by district.
Zoning & Size Requirements [1][2]
Yes, you can build an ADU in Fort Worth. A detached ADU can be up to 1,000 sq ft under current Texas and Fort Worth zoning rules.
| Allowed Zones | One-family residential districts ('A-5', 'A-7.5', 'A-10', 'A-21', 'A-43', 'AR') under §5.301 |
| Max Size (Detached) | 1,000 sq ft |
| Max Size (Attached) | Limited by the district's floor-area and lot-coverage rules |
| Max Size (JADU) | Not a defined category in Fort Worth zoning |
| Max Height | May not exceed the height of the primary residence |
| Max Units | 1 ADU per one-family lot |
Setback Requirements [1][2]
Fort Worth requires a rear setback of about 5 ft for a detached ADU, and parking requirements vary by unit size or location. Owner-occupancy is set by local rules (confirm with the city).
| Rear Setback | Must meet the rear setback of the underlying district (commonly 5–10 ft for accessory structures) |
| Side Setback | Must meet the side setback of the underlying district (commonly 5 ft) |
| Front Setback | Must be behind the front building line of the primary dwelling |
| Parking Required | Off-street parking per district standards (confirm with Development Services) |
| Owner Occupancy | Effectively required — an ADU may not be a separate independent residence (§5.301), so it must remain accessory to the owner-occupied main home |
| Min Lot Size | No separate ADU minimum; lot must meet the underlying district's minimum (e.g., 5,000 sq ft in 'A-5') |
Permit Process & Fees [3]
An ADU permit in Fort Worth typically costs $2,400-$4,000 (building permit + plan review; varies with valuation and square footage) and takes About 4–9 weeks from complete application to permit issuance (confirm current queue with Development Services), through a standard permit review.
| Approval Process | Building permit through Fort Worth Development Services; site plan showing footprint, setbacks and parking required |
| Review Timeline | About 4–9 weeks from complete application to permit issuance (confirm current queue with Development Services) |
| Permit Fees | $2,400-$4,000 (building permit + plan review; varies with valuation and square footage) |
| Impact Fees | $1,000-$1,800 typical water/sewer connection charges (confirm with Fort Worth Water) |
| Plan Check | 2-3 weeks |
| Pre-Approved Plans | No formal pre-approved ADU plan set; standard plan review applies |
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Construction Costs [4][5]
Building an ADU in Fort Worth typically costs $120,000-$240,000 ($120-$240 per sq ft); a garage conversion runs $55,000-$135,000.
| Average Build Cost | $120,000-$240,000 |
| Cost per Sq Ft | $120-$240 |
| Garage Conversion | $55,000-$135,000 |
| Prefab ADU (Installed) | $85,000-$195,000 |
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Rental Income Potential [6][7]
A 2-bedroom ADU in Fort Worth rents for around $1,400-$2,100/mo, an estimated 6-9% annual return.
| Avg Rent (1 Bedroom) | $1,100-$1,650/mo |
| Avg Rent (2 Bedroom) | $1,400-$2,100/mo |
| Short-Term Rental | Restricted in most areas |
| Est. Annual ROI | 6-9% annual return |
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Recent Law Changes
What's Changed Recently
- Texas has no statewide ADU mandate — SB 673 (statewide ADU preemption) died in the House in June 2025, so Fort Worth's local §5.301 rules continue to govern; next TX legislative session is January 2027
- Texas SB 15 and SB 840 took effect September 1, 2025 — they cap parking at one space per unit and ease standards for qualifying small-lot subdivisions and mixed-use/commercial-area housing, but they do not create a by-right ADU on a typical single-family lot
- Fort Worth ADUs remain accessory only — under §5.301 an ADU in a one-family district may not be used as a separate, independent residence, so renting it to an unrelated household as a stand-alone unit is not permitted by-right
- A building permit is required for every ADU (detached, attached, or garage conversion); there is no California-style 60-day deemed-approval in Texas
Tips for Building an ADU in Fort Worth
- Do you need a permit? Yes — Fort Worth requires a building permit for every ADU, including garage conversions. Budget time for plan review with Development Services (817-392-2222).
- Because §5.301 bars a separate independent residence, plan to use the ADU for family, a home office/studio, or a guest unit rather than a stand-alone rental — confirm allowed use with the Zoning division before you build.
- An ADU must observe the side and rear setbacks of your underlying zoning district and cannot be taller than your main house — pull your lot's district (A-5, A-7.5, A-10, etc.) before designing.
- Many Fort Worth lots are larger than comparable Dallas lots, giving more placement flexibility for a detached unit up to 1,000 sq ft.
- Tree preservation rules and the required site plan can affect placement; resolve them early in design.
ADU Builders in Fort Worth
Looking for an ADU builder in Fort Worth? ADU projects need a contractor experienced with local zoning, the permit process, and utility connections — not every general contractor has built one. We match Fort Worth homeowners with experienced local ADU contractors who provide free, no-obligation quotes. Getting at least three bids typically saves 20-40% on the same scope.
Sources & References
All data on this page is sourced from official government records and verified market data. View our full methodology.
- Fort Worth Zoning Ordinance § 5.301 — Accessory Uses on Residential Lots Municipal Code — Accessed 2026-06-28
- City of Fort Worth — Zoning Ordinance & Development Services Planning Department — Accessed 2026-06-28
- City of Fort Worth — Development Services (Permits) Planning Department — Accessed 2026-06-28
- Angi — ADU Construction Cost Data Market Data — Accessed 2026-02-24
- Angi — Local ADU Contractor Costs Market Data — Accessed 2026-02-24
- Zillow Rental Manager — Market Rent Data Market Data — Accessed 2026-02-24
- HUD Fair Market Rents Government Data — Accessed 2026-02-24
- Texas Local Government Code — Land Use Regulations Government Data — Accessed 2026-02-24
Frequently Asked Questions
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