







A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Garage Conversion Contractor Across Duncanville
A garage conversion ADU in Duncanville typically runs $95,000 to $165,000, and plan review through final inspection takes 4 to 7 months when the permit packet is complete. That’s the honest range we give homeowners before any paperwork gets filed. We’re Lodgewick ADU Dallas, and we’ve walked through Duncanville’s code amendments, zoning overlays, and inspection quirks enough times to know exactly where a garage conversion stalls and how to keep it moving. If you’re weighing a garage-to-bedroom, a rentable ADU, or a full apartment conversion, call (361) 204-4652 and we’ll put a written price in front of you before you commit to anything.

Why Lodgewick ADU Dallas Is Duncanville’s Preferred Garage Conversion Contractor Company

Duncanville isn’t Cedar Hill and it isn’t DeSoto. The city runs its own Neighborhood Vitality division, which means garage conversions here get extra scrutiny on fence placement, trash enclosures, lot coverage, and setback buffers. A contractor who’s only pulled permits in surrounding cities will lose weeks learning what our crews already know. Russ Delmar leads our Dallas-Fort Worth operation, and his team has worked through Duncanville’s specific plan review sequence enough times to file a complete packet the first round. That matters because Duncanville’s permit desk sends incomplete applications back with a correction list, and every resubmission adds days to your calendar.
We put the Kingswell Guarantee on every Duncanville project: written price first, real arrival window, clean job site, and a written guarantee delivered before work begins. The 365-Day Done Right Promise means if something isn’t right within a year, we come back and make it right. No charge. A live person answers our phone 24/7, so when you call at 7 a.m. with a question about your framing inspection, you get a human on the line.
Garage Conversion ADU in Duncanville
A Garage Conversion ADU in Duncanville is the process of converting an existing attached or detached garage into a self-contained living unit with its own kitchen, bathroom, and separate entrance. What makes this different in Duncanville specifically is the layering: the city applies both its amended residential energy code and its Neighborhood Vitality standards, so a project that sails through plan review in Grand Prairie can get flagged here for foundation connection details or utility mapping requirements. Most Duncanville homeowners pursue this because an ADU adds rentable space on a lot they already own, without the cost of a ground-up addition.
Attached Garage ADU Work
Attached garage conversions in Duncanville require the project to show that the existing foundation slab can carry living-space loads. Building officials here ask for a structural report and engineered connection details, which pushes the scope beyond drywall and flooring. We scope for that upfront so the number in your contract doesn’t move once the inspection notes come back.

Detached Garage ADU Scope
Detached conversions often give Duncanville homeowners more flexibility on setbacks, but the city requires a surveyed site plan showing the detached structure’s position relative to the main house and lot lines. We file that survey early because skipping it adds two to three weeks to your permit window. The written price covers it.
Garage Apartment Conversion in Duncanville

A Garage Apartment Conversion in Duncanville means turning a garage into a full dwelling unit a homeowner can rent to a tenant, and the city’s owner-occupancy rules require the property owner to live in either the main house or the ADU. That’s a Duncanville specificity to know before you build. We’ve handled these in neighborhoods off Camp Wisdom Road and through the Greenbriar area, where clients wanted a legal rental unit rather than a bootleg apartment that could get flagged at sale.
The Tuff Shed Path
Some Duncanville homeowners start with a Tuff Shed shell and assume it’s conversion-ready. It usually isn’t. We recently scoped a garage-to-ADU over in Greenbriar where a client’s Tuff Shed shell had to be fully reframed and insulated to meet Duncanville’s amended energy code after plan review kicked it back. Our crew coordinated the plat and site plan, then worked through two inspection rounds, framing and final building, before the client could legally rent the unit.
Interior Scope for Rentable Units
A rentable garage apartment in Duncanville needs a compliant kitchen, a full bath, and an independent HVAC zone. The city’s code inspectors look at that HVAC separation closely. We set expectations in writing before any drywall gets hung, so you know exactly what the final inspection will check before we ever start.
Trusted Brands We Service in Duncanville
We work with established ADU manufacturers and material suppliers that hold up to Duncanville’s plan review, including Boxabl and Plant Prefab for delivery-built modules and Tuff Shed when a site-built shell makes more sense. Our familiarity with those systems matters in Duncanville because the city’s energy code amendments treat prefab shells differently than site-built framing; our crews coordinate the required documentation and local structural sign-off before filing. When a Duncanville homeowner chooses a brand we know well, plan review moves faster because the paperwork is already in order.
Common Garage Conversion Contractor Problems We See in Duncanville Homes
- Slab-on-grade foundations treated as finish-ready. Duncanville requires engineered foundation connection details and a structural report when converting a slab-on-grade garage. We’ve seen projects die at plan review because a previous bid assumed the slab was adequate without verification.
- Missing site plan and plat filing. Duncanville’s permit packet specifically asks for a survey and utility location map. Omit those and you add two to three weeks, which some contractors don’t tell clients until the permit desk bounces the application.
- Zoning review surprises on lot coverage. A garage conversion here triggers a separate zoning review for setbacks and lot coverage, and that review can kill a project before the building permit is even issued. We run the zoning check before we write the price.
- Neighborhood Vitality compliance overlooked. Fence and trash enclosure rules in Duncanville apply to ADU conversions differently than in neighboring cities. A contractor who doesn’t know this files a plan that gets flagged for revisions the first round.
Serving Duncanville, TX - Our Local Coverage Area
We’re based in the Duncanville area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.




