A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted ADU Builders for Fort Worth Homeowners
Adding an accessory dwelling unit to your Fort Worth property is one of the smartest ways to create rental income, house aging parents, or build a private workspace, but it also means opening your property to a construction crew you don’t know. That’s the exact worry we built Sutton ADU Fort Worth to solve. Since 2006, our crews have completed ADU projects across Tarrant County under the Threshold Verified standard: every technician is background-checked, identity-verified, and photo-badged, and their name and photo are sent to you before they ever step foot on your lot. If you’re weighing a detached ADU, garage conversion, or room addition in Fort Worth, call (682) 255-2399 for a written price, locked in before any work starts. No vague estimates, no unfamiliar faces.
Key Takeaways: ADU Builders in Fort Worth
- Written prices first. You get a line-item price before any work begins. No surprise invoices at the end.
- You’ll know exactly who shows up. Name, photo, and badge are sent to you before every visit.
- 365-day written guarantee. The Done Right Promise covers defects in workmanship for one full calendar year from completion.
- Real Fort Worth numbers. Most detached ADUs run $180,000 to $320,000 before site work, depending on size and finishes.
- Prefab fluency. We work with Cover, Dvele, and Boxabl, plus Tuff Shed conversions, so you get honest guidance on which product line fits your lot and budget.
ADU Construction
ADU Construction in Fort Worth means building an entirely separate living unit on your existing lot: its own entrance, kitchen, bath, and address. It’s the right move when you need more than a spare bedroom, whether that’s a rental unit paying down your mortgage or a home for a parent who wants to be close but not in the same house. Sutton ADU Fort Worth handles the full scope, from site grading and foundation through framing, mechanicals, and finishes. Most detached ADUs in the 400 to 800 square foot range run $180,000 to $320,000 before site work in this market. A garage conversion typically lands lower, often $90,000 to $160,000, because the shell already exists. Every project gets our written price before a single tool is lifted, and the 365-Day Done Right Promise covers workmanship for a full year after completion.
Detached ground-up builds
When you’re building from bare dirt, we handle setbacks (the required gap between your new structure and the property line), utility trenching, and foundation work specific to Fort Worth’s expansive clay soils. We’ve poured slabs from Arlington to North Richland Hills, and we know which soil prep prevents the slab cracks that cheaper builders leave behind.
Garage and Tuff Shed conversions
Converting an existing structure almost always costs less and moves faster than new construction. We inspect the slab, the electrical load, and the roof framing before we price anything, so the written quote you get is the number you actually pay.
Detached ADU
A Detached ADU is a standalone structure fully separate from your main house, and it’s the preferred choice when privacy matters most. Think of it this way: a renter or family member gets their own walls, their own door, and their own quiet, while you keep your own. Sutton ADU Fort Worth specializes in detached builds on Fort Worth lots, including narrow side yards and deep backyards where setbacks govern what’s possible. You’ll typically spend $220,000 to $320,000 for a two-bedroom detached unit with full kitchen and laundry, depending on whether we pour a new slab or build on a crawlspace. Prefab lines like Cover, Dvele, and Boxabl can tighten that range and shrink the timeline, and we’ll tell you honestly which route fits your budget before you commit.
Prefab and panelized options
We’re experienced with modern prefab manufacturers that deliver quality-controlled modules to the site. If your lot has tight access or you want the shortest possible construction timeline, we’ll walk you through whether a factory-built unit beats stick framing for your specific situation.
Site prep and utilities
Detached means running water, sewer, and electrical to the new unit, and that’s often where surprise costs hide. Our written price includes the utility runs, so you’re not paying change orders when the trench is already dug.
JADU
A JADU, or junior accessory dwelling unit, is the most budget-friendly legal living unit in Texas: a conversion of existing space inside the main home, capped at 500 square feet, with its own entrance and a small kitchenette. It’s the fastest path to renting out space or housing a family member without building anything new. Sutton ADU Fort Worth handles JADU conversions inside the existing footprint: wall construction, a separate exterior door, a compact bathroom, and an efficiency kitchen. Because JADUs use space you already have, they frequently land in the $60,000 to $120,000 range. The written price you receive includes all of it, and the 365-Day Done Right Promise covers the completed work for a full calendar year.
Interior separation and soundproofing
A JADU only works as a rental if you can’t hear your tenant’s TV through the wall. We frame interior partitions with sound-dampening insulation and solid-core doors so the unit truly functions as a separate living space, not a spare room with a sink.
Efficiency kitchen and bath
Fort Worth code for JADUs allows a compact kitchenette rather than a full kitchen, which keeps costs down without making the unit feel like a dorm room. We design these tight spaces carefully, because every square foot has to earn its place.
ADU Plans
ADU Plans are the architectural drawings and permit documents that tell Fort Worth’s building department exactly what you’re building and where it sits on your lot, and they’re the difference between a smooth inspection and a rejected permit. Sutton ADU Fort Worth prepares the site plan, floor plan, elevations, and structural details for every project we build, and we pull the permits so you’re never standing at the counter at the City of Fort Worth Development Services trying to explain a drawing you didn’t prepare. Plan preparation and permit fees in Fort Worth typically run $4,000 to $12,000 depending on the project’s complexity and whether structural engineering is required. That cost is included in our written price, not billed as a separate surprise.
Pre-approved and custom options
If you’re working with a prefab manufacturer like Boxabl or Dvele, we’ll adapt the manufacturer’s standard plans to Fort Worth’s zoning and setback requirements. For custom builds, we draw from scratch with a designer who knows what this city’s plan reviewers look for.
Permit navigation
Fort Worth permits move at their own pace, and we’re familiar with the current timelines and the specific forms the city requires. You won’t be chasing the permit; we handle it and keep you posted.
ADU Contractor
An ADU Contractor is the licensed builder who signs the permit, manages the subs, and is accountable for the work, and the quality of that person determines whether your project finishes in eight months or eighteen. Sutton ADU Fort Worth is the ADU-specialist member of the Threshold Group family, operating under the Threshold Standard since 2006. Every crew member who arrives at your property is background-checked, identity-verified, uniformed, and photo-badged, and we send you their name and photo in advance. Most full-scale ADU builds in Fort Worth run $180,000 to $320,000, and our written price locks that number in before work starts. If it isn’t right within a full year of completion, we make it right, no haggling.
Background checks and identity verification
You should never wonder who’s walking through your gate. The Threshold Verified standard is a named system, not a verbal promise: every field technician passes a background check and identity verification, and shows a photo ID badge at your door before every visit.
Written contracts, no change-order games
The single biggest complaint we hear about other Fort Worth contractors is a low initial bid with a stack of change orders behind it. Our price is written and fixed before the first tool is lifted, and scope changes are priced in writing before we proceed.
ADU Design
ADU Design is where the unit’s livability gets decided: where the bed goes, how the kitchen opens to the living space, whether the unit has a real closet or just a nook. Sutton ADU Fort Worth designs around how you’ll actually use the space, not just what looks good in a rendering. We’ve designed compact one-bedroom ADUs with full kitchens and laundry closets that live larger than they measure, and we’ve laid out two-bedroom units for families who need two real bedrooms. Design services are included in the written price when we build the unit, and for design-only engagements we charge $2,500 to $8,000 depending on the level of detail and the number of revisions. A well-designed ADU rents faster and resells better, and design is not the place to save a few hundred dollars.
Maximizing compact footprints
In a 600-square-foot ADU, every inch either works or it doesn’t. We prioritize storage walls, built-in shelving, and full-height cabinets so the unit feels like a home, not a hotel room with a microwave.
Natural light and privacy balance
On tight Fort Worth lots, windows on one side may face your kitchen window and the neighbor’s fence on the other. We orient window placement for light without sacrificing privacy, using high clerestory windows and frosted glass where the view is just a fence.
Backyard ADU
A Backyard ADU is exactly what it sounds like: a standalone dwelling in the rear yard of your existing home, accessed by a path or driveway rather than the front street. It’s the most popular ADU style in Fort Worth’s established neighborhoods like Ryan Place and Mistletoe Heights, where lots are deep enough to accommodate a rear structure. Sutton ADU Fort Worth builds backyard ADUs that respect the setback, protect mature trees, and connect utilities without tearing up more of your yard than necessary. A single-story backyard ADU of 500 to 800 square feet typically runs $200,000 to $300,000 after site prep and utility connections. Backyard units in larger lots sometimes run toward the top of that range if the utility runs are long or the access path requires a new driveway spur.
Crane access and tight lots
Some Fort Worth backyards are easy for a crane to reach and some are not. We assess the access path before recommending a prefab versus stick-built approach, because the crane decision alone can swing the budget by a meaningful amount.
Protecting existing landscaping
You don’t want to lose a 40-year-old pecan tree to a careless trenching crew. We route utility lines around mature trees where feasible and fence off root zones during construction.
Brands We Service
We’re experienced with a range of recognized prefab and modular ADU lines. Cover is a panelized system that’s popular in California and increasingly showing up in Texas; we handle their site prep, foundation, and finish work, and we’re familiar with their installation sequence from first panel to final inspection. Dvele builds high-performance prefab homes with smart-home integration; we manage the local permitting and site work, and we understand the tolerance requirements their modules demand for a clean set. Boxabl ships foldable units that expand on site, and we’ve coordinated the crane-access and foundation work these builds require. Mighty Buildings focuses on 3D-printed panels; we’ll tell you honestly whether their system makes sense for your site access and Fort Worth’s climate. We also convert Tuff Shed structures into legal dwelling units when the existing shell is suitable, and we hang James Hardie fiber cement on exteriors that need to stand up to North Texas hail and heat. Whether you have one of those brands or any other prefab manufacturer, we can assess it against your lot and give you a straight answer.
Signs You Need a Pro Right Now
- Your existing structure is settling or cracking. If you’re planning an ADU over an existing garage and you see stairstep cracks in the brick or slab, the foundation needs an engineer’s eye before anything else. Building on a compromised slab means paying twice.
- You’ve been told your electrical panel is maxed out. An ADU needs dedicated circuits, and if your existing panel is at capacity, you’ll need a subpanel or a service upgrade. That’s a load calculation and permit, not a handyman fix.
- The city sent a permit or zoning notice. If Fort Worth’s code enforcement has flagged an unpermitted structure on your lot, you need a contractor who can bring it into compliance, not a painter who’ll cover it up.
- You found moisture or mold inside the space you want to convert. Water intrusion in an existing garage or shed means roof or flashing work comes before any framing or finishes. A builder has to fix the water first or the mold comes back through the new drywall.
- Your lot has significant slope or drainage problems. A backyard ADU on a sloped lot needs grading, retaining walls, and possibly engineered drainage before the foundation goes in. This is exactly the kind of problem that turns a cheap bid into a disaster.
Our Process, Step by Step
- 1
Initial conversation and site assessment. We talk through your goals, your budget range, and your lot. Then we visit the property, measure, take photos, and check access, setbacks, and utilities. You get a written price after this visit, not before we’ve seen the site.
- 2
Written proposal with line-item pricing. You receive the build scope, the materials, the timeline, and the price in writing. This is the number you’ll pay unless you choose to change the scope, and we price any change in writing before doing the work.
- 3
Plans, engineering, and permits. We prepare the ADU plans, have the structural details sealed by a Texas-licensed engineer when required, and submit the permit package to the City of Fort Worth. We track the permit and make corrections if the reviewer requests them.
- 4
Construction and weekly updates. Your named project lead is your single point of contact, and you’ll know exactly who will be on site each day. We keep the site clean, protect your landscaping, and walk you through each phase as it’s completed.
- 5
Final inspection and the 365-Day Done Right Promise. We walk the finished unit with you, address any punch-list items, and hand you the warranty. If anything isn’t right within a full year, we come back and make it right at no charge.
How Much Does ADU Builders Cost in Fort Worth?
Most detached ADUs in Fort Worth run $180,000 to $320,000 before site work, which covers a 400 to 800 square foot unit with a full kitchen, bath, and laundry. Garage conversions typically run $90,000 to $160,000. A JADU inside your existing home’s footprint often lands between $60,000 and $120,000. The biggest cost drivers are size, whether you’re building from scratch or converting, the length of utility runs across your yard, and the finish level, from rental-grade to near-custom. Site conditions matter more than most people expect: a level lot with easy access and short utility distances will price lower than a sloped, fenced backyard with a long sewer run. To avoid overpaying, get a written price that includes site prep, utilities, permits, and finishes, not just the box. Our estimates are free and line-itemed, so you can compare honestly. Call (682) 255-2399 for an exact quote on your lot.
Our Service Area Near Fort Worth
Sutton ADU Fort Worth serves the city and the surrounding Tarrant County communities, including Keller, Benbrook, Mansfield, Hurst, Watauga, White Settlement, Forest Hill, Richland Hills, and Everman. We’re also active in Arlington and North Richland Hills, and we frequently work with homeowners across those city lines who need the same written pricing and Threshold Verified crew standards. From our home base in the Fort Worth market, we can typically schedule initial site assessments within a few days, and we’ll tell you the current permit timeline for your specific city before we start.
Serving Fort Worth, TX - Our Local Coverage Area
We’re based in the Fort Worth area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About ADU Builders in Fort Worth
An ADU builder is a contractor who specializes in accessory dwelling units: detached backyard homes, garage conversions, JADUs, and room additions. In Fort Worth, a qualified ADU builder handles design, permits, utility connections, and the full build, often working with prefab manufacturers or stick-framing custom units. Sutton ADU Fort Worth has specialized in ADU construction since 2006.
A detached ADU typically takes 6 to 12 months from the first site visit to final inspection, with permitting timelines in Fort Worth being one of the biggest variables. Garage conversions and JADUs usually finish in 3 to 6 months because the structure already exists. Prefab builds can compress the on-site construction window significantly, but site work and utilities still take time. Call (682) 255-2399 and we’ll give you a realistic timeline for your specific project.
Most detached ADUs in Fort Worth run $180,000 to $320,000 before site work, while garage conversions run $90,000 to $160,000 and JADUs typically cost $60,000 to $120,000. The final number depends on square footage, site conditions, foundation type, and finishes. Our written estimate spells out every line item, so you’re not guessing. Call (682) 255-2399 for a free estimate.
Yes, we work with Cover, Dvele, Boxabl, and Mighty Buildings systems, handling site prep, foundations, permits, and finish work for prefab ADUs in Fort Worth. We’ll tell you honestly which prefab line fits your lot access, budget, and timeline, and which one doesn’t. If you’ve already purchased a unit, we can assess the site and prepare the build plan.
ADU construction is planned work, not emergency response, because permits, engineering, and inspections take time. What we can do is respond quickly to urgent situations like an unpermitted structure flagged by code enforcement or a failed slab on an existing ADU. Call (682) 255-2399 and we’ll get you on the schedule fast.
The 365-Day Done Right Promise covers defects in workmanship for one full calendar year from project completion. If something we built fails within that window, we return and fix it, and the second visit is free, no haggling. It’s written into every Sutton ADU Fort Worth project, not a verbal assurance.
Start by gathering your lot survey, your HOA rules if you have one, and a rough idea of your budget and timeline. Then call us and we’ll walk the property with you, check setbacks and access, and give you a written price. You don’t need architectural plans before the first conversation; that’s part of what we do.
Schedule Your ADU Builders Service in Fort Worth Today
You deserve a builder who hands you a written price, tells you exactly who’s coming to your property, and stands behind the work for a full year. Call Miles Hartwell and the Sutton ADU Fort Worth team at (682) 255-2399 for a free, no-obligation estimate. A live person answers, and the estimate is yours to keep.
Written by Miles Hartwell, Owner at Sutton ADU Fort Worth, serving Fort Worth since 2006.
