An ADU builder in Fort Worth is a licensed contractor who designs and constructs accessory dwelling units — detached backyard units, garage conversions, attached additions, and junior ADUs (JADUs). Because an ADU is a complete second dwelling, the builder coordinates foundation, framing, plumbing, electrical, and HVAC work and pulls it through Fort Worth's permit process and utility connections. Not every general contractor has built one, so the right builder is one with ADU-specific experience in Texas.
What ADU Builders Cost in Fort Worth [4][5]
Based on our Fort Worth cost data, expect the following ranges from local ADU builders. Quotes for the same scope typically vary 20-40% between contractors, so getting at least three bids is the single best way to control cost.
| New Detached ADU (all-in) | $120,000-$240,000 |
| Cost per Sq Ft | $120-$240 |
| Garage Conversion | $55,000-$135,000 |
| Prefab / Modular ADU (installed) | $85,000-$195,000 |
| City Permit & Plan Review | $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) |
For a full line-item breakdown, see our Fort Worth ADU cost guide. To confirm what you're allowed to build before you hire, review the Fort Worth ADU rules (max detached size: 1,000 sq ft; 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).
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How to Vet an ADU Builder in Fort Worth
- License: Confirm a current contractor's license in Texas and that it's in good standing. Ask for the license number and verify it with the state board.
- ADU-specific experience: Ask how many ADUs they've completed in or near Fort Worth and request addresses or photos. ADU permitting and setbacks differ from a kitchen remodel.
- Portfolio & references: Get references from recent ADU clients and, if possible, visit a finished unit.
- Insurance: Verify general liability and workers' compensation coverage. Ask for a certificate of insurance.
- Written, detailed bid: Insist on an itemized, fixed-price or clearly-scoped bid — not a verbal estimate. It should state whether permits ($2,400-$4,000 (building permit + plan review; varies with valuation and square footage)), plan check (2-3 weeks), and impact fees ($1,000-$1,800 typical water/sewer connection charges (confirm with Fort Worth Water)) are included.
- Permit handling: Confirm they manage Fort Worth's permit process ("Building permit through Fort Worth Development Services; site plan showing footprint, setbacks and parking required", typically About 4–9 weeks from complete application to permit issuance (confirm current queue with Development Services)) and who is responsible if revisions are required.
- Payment schedule: Avoid large upfront payments. A reasonable schedule ties payments to completed milestones.
Questions to Ask Before You Hire
- How many ADUs have you built in Fort Worth in the last two years?
- Is your bid fixed-price, and what would trigger a change order?
- Are permits, plan check, and utility connection fees included?
- What's a realistic timeline, including permit review (About 4–9 weeks from complete application to permit issuance (confirm current queue with Development Services)) and construction?
- Who is my point of contact and how are delays communicated?
- What warranty do you provide on workmanship?
- Can you share three recent Texas ADU client references?
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