ADU Builder in DFW | Permitted Builds Across Tarrant, Denton & Wise County
Dallas ADU Builder is a licensed general contractor based in Keller, TX, serving North Texas families with ADU builds, home additions, and detached garages since 2001. We build across Tarrant County, Denton County, and Wise County, covering Keller, Fort Worth, Southlake, Flower Mound, Denton, Roanoke, and every city in between. Every project starts with a free on-site visit before a single number is discussed, because we have been building in this part of DFW long enough to know the permit offices, the subcontractors, and the site conditions that make each city different.
Cost Range
ADUs $120K to $260K+
Home additions $80K to $180K+
Detached garages $35K to $90K+
Timeline
9 to 14 months for a full detached ADU
6 to 10 months for additions
8 to 14 weeks for garages
Permits
All projects require a building permit in every city we serve. We handle the full application, submittal, and inspection coordination.
What We Build
ADU Builds
Detached accessory dwelling units, garage apartments, and multigenerational guest houses. Ground-up construction with a separate foundation, utilities, entrance, kitchen, and bathroom. Fully permitted in every Tarrant, Denton, and Wise County city we serve. A detached ADU in DFW typically costs $120,000 to $260,000+ depending on size, site conditions, and city.
Home Additions
In-law suites, primary suite expansions, and room additions connected to your existing home. Structurally tied into the home's existing foundation, roof, and systems. Matched to the home's exterior finish. Most addition projects in North Texas run $80,000 to $180,000+ depending on square footage and structural complexity.
Detached Garages
Custom detached garage builds, workshop structures, and garages framed to carry a future apartment above. From a standard two-car slab-and-frame build to a climate-controlled workshop with 240V service, permitted through your city's building department. Typical range in DFW is $35,000 to $90,000+.
Garage Conversions
Existing attached garages converted to habitable living space: in-law suites, home offices, guest rooms, and ADU units where city code allows. Requires meeting habitable space standards including ceiling height, insulation, egress, and fire separation. Typically costs $40,000 to $90,000 depending on size and finish level.
Why North Texas Families Choose Dallas ADU Builder
We have been building in Tarrant County, Denton County, and Wise County since 2001. The Keller building department, the Fort Worth Development Services office, the Denton permit desk: we know the people, the submission requirements, and the timelines that the cities do not advertise. When you hire a contractor who has never pulled a permit in your city, you pay for their learning curve. You do not pay for ours.
Dallas ADU Builder is rated in the top 1% of Texas contractors by BuildZoom and Block, based on verified permitted project history, not review management. Every number on that score is from a real permit on a real job site in this region.
The families who hire us are typically dealing with a specific situation: a parent who needs to be closer but not inside the main living space. A grown child who needs independence on the same property. A home that has been outgrown but is in a neighborhood they do not want to leave. We build the structure that solves that problem, done right and built to last.
Service Areas
We operate in Tarrant County, Denton County, and Wise County by design. In Tarrant County, we serve Keller, Fort Worth, Southlake, Westlake, Colleyville, North Richland Hills, Haltom City, Saginaw, Haslet, Roanoke, and surrounding communities. In Denton County, we serve Denton, Flower Mound, Lewisville, Highland Village, Lantana, Trophy Club, and other communities. Wise County projects are evaluated on a case-by-case basis.
Staying focused on one region makes us better at that region. We know the Keller ISD school boundaries that affect property values. We know which neighborhoods in Hidden Lakes and Bear Creek have HOA design review requirements. We know that Southlake's permitting timeline differs from Fort Worth's. That local knowledge matters on every project.
The Build Process
Site Walkthrough & Feasibility
We come to your property before anything is quoted. We check lot coverage limits, setbacks from property lines, utility connection distances, and HOA documents. If a project is not feasible on your specific lot, you hear it here, not after a deposit has been paid.
Design & Plan Development
Architectural and structural drawings built to your city's submittal requirements. We review everything with you before it goes to the building department.
Permit Management
We handle the full permit package, submission, follow-up, and any revision responses. We build your city's permit timeline into the project schedule from day one so there are no surprises.
Construction
Ground breaks when the permit is in hand. Weekly updates, direct communication, and a project manager who answers his phone. If anything changes, you hear it directly.
Inspections & Final Walkthrough
City inspection scheduled and attended. Certificate of occupancy issued. Full room-by-room walkthrough before keys are handed over.
The Questions Homeowners Ask Before Building
A detached ADU in Tarrant County and the DFW area typically costs $120,000 to $260,000+ depending on size, site conditions, foundation type, utility connection distance, and finish level. Fort Worth projects tend to run slightly higher than Keller due to specific supplemental use standard requirements. Garage conversions start lower. We give you a realistic range after the site visit, not a generic website estimate.
Dallas ADU Builder serves Tarrant County, Denton County, and Wise County. In Tarrant County, we work in Keller, Fort Worth, Southlake, Westlake, Colleyville, North Richland Hills, Haltom City, Saginaw, Haslet, and Roanoke. In Denton County, we serve Denton, Flower Mound, Lewisville, Highland Village, Lantana, and Trophy Club. Wise County projects are evaluated individually.
A full detached ADU from first site visit to move-in typically runs 9 to 14 months. That includes 2 to 4 weeks of site review and planning, 4 to 8 weeks of design, 4 to 12 weeks of permit review (city-dependent), 3 to 6 months of construction, and 2 to 4 weeks of final inspections. Keller's permit process typically runs faster than Fort Worth's.
Yes. We manage the full permit application for every project in every city we serve. This includes the site plan, foundation drawings, framing plans, electrical drawings, and any supplemental documentation the building department requires. We follow up on the application, respond to revision requests, and track the review status throughout.
Texas does not have a statewide ADU mandate. A bill that would have legalized ADU construction by right across all Texas municipalities failed in the most recent session. Every city sets its own rules. Fort Worth and Keller both permit ADUs but with different requirements, timelines, and restrictions. We verify the current rules for your specific address before any plans are drawn.
A detached ADU is a completely separate structure with its own foundation, utilities, and entrance, fully independent from the main home. A home addition expands the existing home's footprint and connects to it structurally. ADUs offer more independence and privacy. Additions cost less per square foot and draw from the home's existing utility systems.
It depends on your specific city and zoning district. In most Keller residential zones, ADUs designated as detached guest houses cannot be used as independent rental units. Fort Worth's rules vary by district. If rental income is part of your plan, we confirm eligibility for your specific address before scope is written.
Call (817) 372-0211 or complete the contact form on this page. We follow up within one business day and schedule a free on-site visit at no obligation. Every project starts with a property walkthrough before any pricing is discussed.
Projects Built Across North Texas
Every project below was built in Tarrant, Denton, or Wise County. Permitted, inspected, and handed over to a family that uses it every day.
Ready to find out what is buildable on your North Texas property?
Call (817) 372-0211 or complete the form below to schedule a free site visit. No obligation, no pressure, just a straight answer about what your lot can support.
Proudly Serving North Texas Homeowners
Mon – Fri: 7:00 AM – 6:00 PM
Sat: 8:00 AM – 2:00 PM
Sun: Closed
Established 2001 · Top 1% of Texas Contractors · Verified Permit History