Boxabl Garage Conversion Contractor in Dallas: What to Know First
We convert Boxabl units into permanent living space across Dallas, and we do it with a written price before any work starts. Most Boxabl garage conversions in the Dallas area run 6 to 12 weeks from permit to final inspection, depending on foundation work and utility tie-ins. You’ll get a fixed number on paper, a permitted job, and a full year of written coverage under The Garrison Standard.
This page is for Dallas homeowners who already own a Boxabl and want it anchored, converted, and finished as a garage apartment, guest suite, or rental unit. If that’s you, call (903) 342-8977 and we’ll walk the site and give you a real number.
How Boxabl Products Fail – and How We Fix Them
Boxabl builds a tight, transportable shell. The failures we see in Dallas are almost always in the marriage between that shell and the site, not in the panels themselves. Here’s what actually goes wrong, by the work we do most:
- Casita foundation drift on expansive clay. Dallas sits on some of the most reactive clay soil in Texas. A Boxabl Casita set on a slab without soil testing will shift within two seasons. We see door frames binding and corner trim pulling loose. The fix is not caulk. It’s helical piers or a deepened edge beam, engineered for the specific lot. This is the number one issue we correct on Boxabl garage conversions in East Dallas and Mesquite, where the clay is at its worst.
- Undersized HVAC for the Texas summer. Boxabl units ship with a compact mini-split sized for moderate climates. In Dallas, a south-facing garage conversion with that unit will struggle to hold 75 degrees in August. We upgrade to a properly sized ducted or multi-head system before the walls close up. This is cheaper to do during conversion than after the first $400 electric bill.
- Panel joint settling at the fold lines. After transport and crane placement, the hinge and fold seams on some Casita units develop hairline movement. You’ll see it first as a horizontal crack in the drywall near the ceiling line. The real cause is usually shimming tolerance at the foundation, not the panel itself. We re-level and re-shim per the installation spec, then patch once. If we patch before leveling, it cracks again in six months.
- Standard garage-door opening reinforcement. When a Boxabl is placed in or near an existing garage and the garage door opening is being walled in, the load path changes. We’ve seen homeowners let a handyman frame that opening with 2x4s and no header. That wall carries roof and wind load in Dallas storm season. We engineer the header and anchor it to the Boxabl corner posts, which is what the city inspector looks for.
- Plumbing chases that were never insulated. Boxabl runs plumbing through a floor chase. In a Dallas garage conversion where the unit sits on an uninsulated slab edge, that chase freezes during the February cold snaps we have gotten since 2021. We insulate and heat-trace the chase during conversion. If you are doing the conversion anyway, this is a $400 decision that prevents a $4,000 repair.
Our Boxabl Garage Conversion Contractor Process
We do this work in a set order, and we tell you what that order is before we start. No surprises on week four.
- 1
Site walk and written estimate. We come to your Dallas property, look at the Boxabl, the foundation option, and the utility access. You get a line-item price in writing. Reed Calloway signs that estimate himself, and the number does not move unless you change the scope.
- 2
Permit package and soil report. We pull the soil test if the unit is going on grade, then file the full permit set with Dallas Development Services. We handle setbacks, variances, and the inspector communication. You do not stand in line at the permit office.
- 3
Foundation and utility rough-in. We set the piers or pour the slab, run sewer, water, and electrical to the Boxabl connection points, and anchor the unit. This is where most cheap conversions go wrong. We do it to the manufacturer’s placement spec and the Dallas building code, both.
- 4
Framing, insulation, and mechanicals. We frame the garage opening, insulate the chase and shell, and install the HVAC system sized for a Dallas summer. The Boxabl panel system stays intact; we do not cut into structural panels without an engineer’s letter.
- 5
Finish, trim, and inspection. Drywall, paint, flooring, doors, and trim. We call the inspector, walk the job with him, and hand you a clean final. We leave the site swept and the dumpster hauled.
- 6
The Garrison Standard walkthrough. Before you write the final check, we walk the conversion together and note anything that is not right. It gets fixed before close-out. Then you get the written one-year guarantee, which covers workmanship defects for 365 days from completion.
What Boxabl Garage Conversion Contractor Costs in Dallas
Here are real numbers, not a sales range designed to get you on the phone. These reflect what we have bid on Dallas Boxabl jobs in the past two years, before permit fees and any utility upgrades from the street.
- Basic attached garage to living space, Boxabl shell already on site: $35,000 – $55,000
- Detached Boxabl Casita placed on new slab, with kitchenette and bath: $75,000 – $115,000
- Full garage apartment conversion with separate meter and HVAC: $95,000 – $140,000
- Foundation correction on expansive clay (helical piers, re-level): $8,000 – $18,000
What moves the price: the condition of your existing garage slab, how far the sewer and electrical have to run, whether the unit needs a structural header package, and the finish level you pick. We put the price in writing before the first nail goes in, and that number holds. Call (903) 342-8977 for a free estimate on your specific Boxabl.
Why Dallas Homeowners Call Fielding ADU Dallas for Boxabl Work
We are an independent Boxabl service provider, not a dealer or a manufacturer-authorized shop. That distinction matters. It means we tell you when a Boxabl part is worth paying OEM prices for and when a quality aftermarket part is the smarter call. It also means we are not trying to sell you a new unit. We fix and convert what you already own.
Fielding ADU Dallas is part of the Garrison Partners family, which has been building to The Garrison Standard since 2006. The Garrison Code is how we operate: show up in the window, price in writing, by the book, leave it clean, stand behind it for a year. Our crew is background-checked and uniformed. A live person answers the phone at (903) 342-8977 around the clock, not a voicemail tree.
We also work with Abodu, Cover, and Dvele units, so if you are weighing a different prefab platform or your neighbor has one, we can speak to the trade-offs honestly. Most of our Dallas Boxabl conversions come from homeowners who already tried the handyman route and got a half-permitted mess. We fix those, too.
FAQs
A structural modification can void portions of the Boxabl warranty, which is why we do not cut into structural panels without an engineer’s letter and we keep all work within the manufacturer’s published tolerance. Cosmetic and mechanical upgrades done outside the panel system rarely affect warranty coverage. We document every cut and connection so you have a record if a warranty question ever comes up.
A Boxabl that has been permanently anchored, plumbed, and wired into a Dallas foundation should be treated as a fixed structure. Moving it after conversion means disconnecting all utilities, cutting anchors, and re-transporting a unit that has already been finished inside, which risks the drywall and trim. If you think you might move the unit in the next three years, tell us before we design the conversion and we will keep the tie-ins reversible where the code allows.
Most Boxabl garage conversions in Dallas take 6 to 12 weeks from permit filing to final inspection. The fastest we have completed a basic attached conversion was just under five weeks, but that was an ideal slab and an uncomplicated utility run. Dallas plan review times and weather can add two to three weeks. We give you a schedule with the written estimate and we update it if the city moves a date.
Yes. We pull every permit for the conversion under Fielding ADU Dallas, and the job is inspected by Dallas Development Services. You never meet an inspector on your own or carry paperwork to the office. Permitted work is the only kind we do; unpermitted conversions are a liability when you sell the house, and we will not build one.
It covers workmanship defects for 365 days from the date we finish. If something we built fails inside that year, we return and correct it at no charge, and we send a second visit confirmation in writing before we come back. It does not cover damage from storms, owner modifications, or normal wear. The guarantee is printed on your contract, not implied.
Call (903) 342-8977 to schedule your free Boxabl garage conversion estimate in Dallas. We will walk the property, give you a real number, and put it in writing.
Written by Reed Calloway, Owner, Fielding ADU Dallas at Fielding ADU Dallas, serving Dallas and nearby areas.
