Attached Garage Conversion in Dallas, TX
An attached garage conversion turns the garage that shares a wall with your house into a finished living space, usually an accessory dwelling unit (ADU), a home office, or a guest suite. In Dallas, most attached garage conversions run between $85,000 and $145,000 when done as a permitted ADU with a kitchenette and bathroom. If you’re wondering whether your existing garage can become real living space, call Lodgewick ADU Dallas at (361) 204-4652 and we’ll walk you through what’s possible on your specific lot.
This is a focused slice of our broader Garage Conversion ADU in Dallas work. Attached conversions are different from detached builds because the garage already shares structure, roofline, and often electrical and plumbing stubs with your home. That can save money on foundation and utility work, but it also means the conversion has to be handled carefully so your existing house stays sound and the new space feels like it was always there.
Russ Delmar leads our Dallas team, and he’s overseen attached garage conversions across the metro area, from East Dallas bungalows with cramped one-car garages to North Dallas homes where the garage became a full one-bedroom rental unit. The Kingswell Guarantee applies here the same as on any build: written price first, defined arrival window, clean job site, and a written guarantee on the finished work.
If you’ve been burned before by a contractor who gave you a verbal estimate and then the price crept up after demo started, you’re the reason we put everything in writing before a single wall comes down.
Key Takeaways
- Attached garage conversions in Dallas typically cost $85,000 – $145,000 for a permitted ADU with kitchenette and bath.
- The garage shares walls and roofline with your home, which can reduce foundation and utility costs compared to a detached build.
- Dallas requires permits for garage conversions; we handle the full permitting process, including zoning checks.
- Every project gets a written price before work starts and the 365-Day Done Right Promise in writing.
- Call (361) 204-4652 for a free estimate with real numbers, not a vague range you have to chase.
When You Need Attached Garage Conversion
Most Dallas homeowners call us when the garage has stopped being useful for cars and started being dead square footage. Here are the situations we see most often in this market:
- You need a rental unit but don’t want to build from scratch. An attached garage already has a slab, walls, and a roof. Converting it into an ADU means you can start earning rental income without the site-prep costs of new construction.
- Your parents or adult children need to live close. We hear this in Lake Highlands and Casa View all the time. An attached garage becomes a private suite with its own entrance, so family is close without sharing a kitchen.
- You work from home and the dining table isn’t cutting it. A garage that shares a wall with the house is easy to tie into your existing HVAC. One minute you’re spreading paperwork across the kitchen island, the next you have a quiet office with a door that closes.
- Your garage is a storage graveyard. If the cars have been in the driveway for two years and the garage is full of boxes you never open, converting it adds real square footage to your daily life instead of housing clutter.
- You inherited a home with a garage that doesn’t fit modern cars. Older Dallas homes, especially pre-1960s builds in areas like Oak Cliff and East Dallas, often have garages too narrow or short for today’s vehicles. Converting them to living space makes sense when parking there was never realistic.
- You want to add value without expanding the footprint. Attached conversions don’t require new lot coverage, which means fewer zoning headaches in established Dallas neighborhoods where side-yard setbacks are tight.
Our Attached Garage Conversion Process
We keep the process predictable. Here’s exactly how it goes when you work with Lodgewick ADU Dallas:
- Site visit and written assessment. Russ or a senior team member walks your attached garage and the shared wall, checks the slab condition, looks at your electrical panel, and measures ceiling height. You get a written summary of what’s feasible and what it will cost. No verbal ballparks that evaporate.
- Written price, before any work starts. You get a line-item written price. Not an estimate that can drift. This is the number, and it’s the number you’ll pay unless you change the scope. That’s The Kingswell Guarantee, and it’s in writing on every project.
- Permitting and plan preparation. Dallas requires building permits for garage conversions, and depending on your zoning district, there may be additional ADU-specific requirements. We handle plan preparation, permit submittal, and any HOA paperwork you need. You shouldn’t have to become a code expert to get this done.
- Construction with a defined arrival window. Background-checked, uniformed technicians show up in the window we gave you. The job site stays clean. At the end of every workday, the site is tidy enough that you can walk through without tripping over debris. That’s part of the promise.
- Written guarantee and final walk-through. Before we hand over the space, you get a written guarantee covering the work for 365 days. If something’s not right, we come back and make it right at no charge. That’s the 365-Day Done Right Promise, and it’s not a slogan. It’s a written commitment on every project.
Attached Garage Conversion Pricing in Dallas
Attached garage conversions in Dallas typically cost between $85,000 and $145,000 for a complete permitted ADU with a kitchenette, bathroom, and separate entrance. Smaller projects, like converting a one-car garage into a home office or bedroom without a bathroom, can run $45,000 to $70,000. Here’s how that breaks down:
| Scope | Typical Dallas Range |
|---|---|
| Home office / bedroom conversion (no bath) | $45,000 – $70,000 |
| Studio ADU with kitchenette and bath | $85,000 – $110,000 |
| One-bedroom ADU with full kitchen and bath | $110,000 – $145,000 |
| Two-bedroom conversion (larger garage) | $135,000 – $170,000+ |
What moves the number? Ceiling height is the big one. Dallas building code requires living spaces to have a minimum ceiling height, and many 1950s-1970s garages were built with 8-foot or lower ceilings. If the slab and roofline don’t give you enough clearance, you’re looking at structural work to raise or modify the roof, which can add $15,000 to $30,000 quickly.
The condition of the existing slab matters too. Garages are often built on thinner slabs than living spaces, and some older Dallas slabs have cracks or settlement. Depending on what we find, you may need a structural topping or partial replacement before flooring goes down. That’s why our written assessment happens before the written price, so you know about slab issues up front, not after demo day surprises you.
Plumbing is another variable. Attached garages usually share a wall with the house, which means water and sewer lines are closer than in a detached build, but they’re rarely already stubbed into the garage itself. Running a new drain line from the garage to the main sewer connection, especially in older neighborhoods with clay pipe, can add $5,000 to $12,000 depending on depth and distance.
Electrical is usually simpler. Most attached garages already have a subpanel or at least a dedicated circuit or two. But a full ADU with a kitchenette and mini-split HVAC will likely need a new subpanel, which runs $2,500 to $5,000 in most Dallas homes.
We work with established manufacturers when a prefabricated component makes sense for your budget and timeline. For attached conversions, that’s less common than with detached builds, but when prefab bathroom pods or kitchen modules fit the space, we’ve used units from Boxabl and Plant Prefab to keep costs predictable. For finishing materials, we often recommend James Hardie siding products for any exterior work and Tuff Shed components when storage or workspace additions are part of the overall plan.
The best way to get a real number for your specific garage is to call (361) 204-4652 and schedule a site visit. The estimate is free, and the price you get is the price you pay.
What Makes an Attached Conversion Different from a Detached Build
Attached garage conversions share walls, roofline, and sometimes HVAC ducting with your main house. That changes the work in three main ways:
First, fire separation matters more. Dallas code requires a fire-rated separation between an attached garage and living space. When you convert the garage, you’re changing the use of that space, which means the separation requirements shift. A garage that was always a garage may have minimal fire protection at the shared wall. A converted living space usually needs drywall upgrades, door changes, and sometimes additional smoke detection tied to the main house system. We handle this in the permit drawings so there are no surprises at inspection.
Second, HVAC integration is both an opportunity and a complication. Because the garage is attached, it’s often easier to extend your existing central air system into the converted space than it would be to heat and cool a detached ADU. But garage square footage was never factored into your original HVAC load calculation. Extending ducts without checking capacity leaves you with a room that’s hot in August and cold in January. We run load calculations and, in many Dallas homes, we recommend a dedicated mini-split for the converted space so you don’t strain your main system.
Third, the roofline connection requires careful flashing work. Where the garage roof meets the main house roof, or where the garage walls tie into the main walls, any conversion work can introduce leak points if the flashing isn’t redone correctly. Dallas gets intense spring storms and occasional hail. A poorly flashed seam becomes a ceiling stain six months after you move in. Our crews inspect every tie-in point before we close up walls, and the finished flashing is covered under the 365-Day Done Right Promise.
Attached Garage Conversion and Dallas Permitting
Every attached garage conversion in Dallas requires building permits through the City of Dallas Development Services Department. Depending on your zoning district and specific neighborhood plan, you may also need an ADU registration or a certificate of occupancy change. In some historic districts and conservation districts, exterior changes trigger additional design review.
We handle the full permitting process as part of the project. The written price you get includes permit fees, plan preparation, and the time it takes to get approvals. You don’t have to make separate trips to the permit office or figure out which forms apply to your property. That’s part of what you’re paying for, and it’s part of why we give you a written price up front rather than an estimate that doesn’t include soft costs.
If you’re in a former suburb that’s now part of Dallas proper, like Pleasant Grove or Far North Dallas, the zoning and permitting path can differ from what a homeowner in central Dallas faces. We check your specific property before we quote, so the price reflects your reality, not a generic Dallas average.
Can You Live in an Attached Garage Conversion While We’re Working?
Usually, yes. Because the garage is attached but generally outside your main living envelope, most Dallas homeowners stay in the house during construction. There will be noise during demo and framing, and dust mitigation is part of our clean-site process. The shared wall work can occasionally require brief access to the house interior for electrical or plumbing tie-ins, but we schedule those in advance and keep the intrusion minimal.
If you’re converting the garage into an ADU for family members who need to move in quickly, we’ll give you a realistic timeline at the site visit. Typical attached conversions take 8 to 14 weeks from permit approval to final inspection, depending on scope and any structural surprises we find when walls come open.
FAQs – Attached Garage Conversion
How much does an attached garage conversion cost in Dallas?
An attached garage conversion in Dallas typically costs $85,000 to $145,000 for a complete ADU with kitchenette and bathroom, while a simpler office or bedroom conversion runs $45,000 to $70,000. Your specific price depends on ceiling height, slab condition, plumbing distance, and whether you’re adding HVAC. Call (361) 204-4652 for a free site visit and a written price that won’t change.
Do I need a permit to convert my attached garage in Dallas?
Yes. Dallas requires building permits for garage conversions, and depending on your zoning district, you may also need ADU registration or a change-of-use approval. Lodgewick ADU Dallas handles the entire permitting process as part of your project, and permit fees are included in your written price.
Is it cheaper to convert an attached garage than to build a detached ADU?
Usually, yes. Attached conversions typically save $20,000 to $40,000 compared to a detached ADU of similar size because the foundation, walls, and roof already exist, and utility connections are closer. However, low ceiling heights in older garages can add structural costs that narrow the gap. We’ll assess your specific garage before quoting so you know the real comparison.
Can you turn my attached garage into a rental unit?
Yes, and that’s one of the most common reasons Dallas homeowners convert attached garages. A rental-ready ADU needs a separate entrance, kitchenette, bathroom, and its own climate control, all of which we include in a complete conversion. Dallas has specific ADU requirements, and we make sure your project meets them before work begins. Call (361) 204-4652 to talk through the rental math for your property.
How long does an attached garage conversion take?
Most attached garage conversions in Dallas take 8 to 14 weeks from permit approval to final inspection. Structural surprises and scope changes are the most common reasons for delays, which is why our written assessment happens before your written price. We tell you the timeline up front and stick to the arrival window we commit to.
Why Dallas Homeowners Choose Lodgewick for Attached Conversions
The Kingswell Way is simple: say the price before the work, show up in the window given, leave the place cleaner than we found it, put the guarantee in writing, and come back if it fails. That’s it. That’s the whole approach.
Every attached garage conversion we do in Dallas operates under The Kingswell Guarantee. You get a written price before any work starts, not a ballpark that expands. You get a defined arrival window, so you’re not waiting around wondering if the crew will show. The job site is cleaned daily. And when the work is done, you get a written guarantee that covers the project for 365 days. If something’s not right, we come back and make it right, free.
Our crew members are background-checked and uniformed. You’ll know who’s on your property, and you’ll recognize them day to day. When you call with a question about your build or your guarantee, a live person answers. Not a voicemail. Not a chatbot. 24 hours a day, 7 days a week. That’s the standard, and it’s been the standard since 2010, when Lodgewick became part of the Kingswell family of home-service companies.
Russ Delmar has walked attached garages all over Dallas, from Preston Hollow to Buckner Terrace and down to Red Bird. He’ll tell you straight what your garage can become, what it will cost, and what it won’t. No pressure. Just written numbers and a written guarantee.
Ready to Talk About Your Attached Garage?
If your attached garage is doing nothing but holding boxes and old lawn equipment, it’s time to find out what it could be. Call Lodgewick ADU Dallas at (361) 204-4652 for a free estimate. We’ll schedule a site visit, walk the space with you, and give you a written price for the conversion. No price changes at the door. No vague timelines. Just a real plan for turning that garage into living space you’ll actually use.
Written by Russ Delmar, Owner at Lodgewick ADU Dallas, serving Dallas.
