A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateHow Much Does a Garage Conversion ADU Cost in Dallas?
A garage conversion ADU in Dallas typically costs between $95,000 and $165,000 for a full build-out with a kitchen and bathroom in 2026. A simpler studio conversion without plumbing runs $70,000 to $110,000, while a high-end two-bedroom unit with premium finishes can reach $195,000 or more. These figures include design, permits, labor, and standard mid-range materials, and they assume the existing garage structure is in sound condition.
Garage Conversion ADU Cost Breakdown (2026)
Here’s what the numbers actually look like in Dallas this year. These are the line items we walk through with homeowners on every Garage Conversion ADU in Dallas project.
| Line Item | Typical Range (Dallas, 2026) |
|---|---|
| Design & architectural drawings | $4,000 – $9,000 |
| City of Dallas permits & impact fees | $3,500 – $8,500 |
| Foundation repair / slab work | $2,000 – $12,000 |
| Framing & structural upgrades | $8,000 – $18,000 |
| Electrical (panel upgrade, new wiring) | $6,000 – $14,000 |
| Plumbing (kitchen, bath, sewer tie-in) | $10,000 – $22,000 |
| HVAC (mini-split or ducted) | $5,500 – $12,000 |
| Insulation & drywall | $4,500 – $10,000 |
| Flooring | $3,000 – $8,000 |
| Kitchen (cabinets, counters, appliances) | $12,000 – $28,000 |
| Bathroom (fixtures, tile, shower) | $10,000 – $22,000 |
| Windows & exterior doors | $3,500 – $9,000 |
| Paint & finish work | $2,500 – $6,000 |
| Site work, cleanup, dumpster | $1,500 – $4,000 |
Keep in mind, the single biggest swing factor is whether your garage slab is in good shape. In older Dallas neighborhoods like Lakewood or Casa View, we see slabs from the 1950s and 60s that have settled or cracked. Re-leveling can add $5,000 to $12,000 before framing ever starts. In newer Garland or Richardson builds from the 1990s and later, the slab usually needs minimal work.
Another Dallas-specific driver is the sewer tie-in. Many older East Dallas garages sit far from the main lateral, and city code requires a plumber to run a new line with proper slope. That’s a common $6,000 to $14,000 line item homeowners don’t see coming.
What Affects Garage Conversion ADU Pricing in Dallas
- Garage condition and age. A detached garage built before 1970 in neighborhoods like Old East Dallas or Oak Cliff often has foundation settling, rot, and outdated wiring. Bringing it to code adds real cost before finish work begins.
- Plumbing distance from the main house. If your garage sits far from the existing sewer line, the trenching and tie-in work gets longer. In Dallas clay soil, that trenching is slow going, and the labor shows up on the invoice.
- Kitchen or kitchenette. A full kitchen with a range, vent, and dishwasher can add $18,000 to $30,000 over a simple wet bar. ADUs without cooking facilities fall under different and cheaper permit classifications in Dallas.
- HVAC choice. A ductless mini-split runs $5,500 to $9,000 installed and handles Dallas summers fine. Ducted systems cost more and make sense only when the garage shares attic space with conditioned air from the house.
- Finishes and materials. Stock cabinets, laminate counters, and standard tile keep costs down. Custom cabinetry, quartz counters, and upgraded flooring can push a project past $170,000 quickly.
- Detached vs. attached garage. Attached conversions share walls, roof, and sometimes utilities with the house, which trims costs. Detached garages need separate utility runs and often their own subpanel, adding $4,000 to $9,000 in Dallas.
How Much Does It Cost Per Square Foot?
In Dallas, garage conversion ADU costs land between $220 and $310 per square foot for a complete unit with plumbing and a kitchen. A 400-square-foot conversion at $250 per square foot comes in around $100,000. A 700-square-foot two-bedroom at $280 per square foot runs roughly $196,000. These numbers track with what we see across Dallas County: smaller units cost more per square foot because fixed expenses like permits, design, and sewer connection get spread over less space.
When homeowners ask us this question, we tell them the same thing Russ Delmar tells every client: per-square-foot numbers are rough planning tools, not quotes. A real written price means walking the site, checking the slab, tracing the sewer line, and looking at the electrical panel. That’s the only way to know the real number.
Prefab ADU Options: A Different Price Path
Some Dallas homeowners go a different route and bring in a prefabricated ADU rather than converting the garage itself. Brands like Abodu and Boxabl ship units that drop onto a prepared site, typically running $190,000 to $280,000 all-in for a one-bedroom with utilities connected. Plant Prefab and Dvele sit at the higher end, often crossing $300,000 for larger or custom-configured units. Mighty Buildings and Cover land in the middle, while Tuff Shed offers basic shell structures for far less, though those need full interior build-out and rarely meet Dallas residential code for a legal ADU without significant additional work.
We work with all these manufacturers and can say plainly: a garage conversion usually saves $30,000 to $80,000 compared to a new prefab unit because the shell, roof, and foundation already exist. That’s why so many Dallas homeowners start with the garage they already have.
Dallas Permits and Code Requirements
The City of Dallas requires a building permit for any garage conversion ADU, plus separate mechanical, electrical, and plumbing permits. The city’s ADU ordinance allows accessory dwelling units on single-family lots, with a maximum size tied to the lot dimensions and a minimum distance from property lines. Impact fees and permit costs in Dallas typically total $3,500 to $8,500 depending on the scope. The permitting timeline runs six to twelve weeks in most cases.
One code item that surprises homeowners: Dallas requires all ADU bedrooms to have an egress window meeting specific size requirements. Older garages often have no windows at all, which means cutting new openings. That work adds $1,800 to $4,000 per window depending on whether the wall is wood-framed or brick.
We handle the full permit package for our clients. The drawings, the submittals, the inspections. Homeowners who try to pull their own permits for a garage conversion in Dallas frequently lose four to six months to plan corrections and resubmittals before they ever break ground.
How Long Does a Garage Conversion ADU Take in Dallas?
A standard one-bedroom garage conversion ADU in Dallas takes three to five months from permit submittal to final inspection. Planning and design adds four to eight weeks before that. Larger two-bedroom units or conversions with foundation repairs run six to eight months. Prefab ADUs, once permits and site prep are handled, install in a matter of days, but the groundwork and utility connections still take two to three months.
Under The Kingswell Guarantee, you get a written timeline before work starts. We give a defined arrival window for every phase, and the crew shows up in that window. If the schedule shifts, you hear about it from a live person, not a text bot.
Garage Conversion vs. Building a New ADU: Cost and Tradeoffs
A new detached ADU in Dallas runs $180,000 to $280,000 for a comparable one-bedroom unit. The garage conversion advantage is the existing structure: the roof, walls, and foundation are already there. What you give up is design freedom and sometimes ceiling height. Older Dallas garages often have 8-foot ceilings, while new ADUs can be built with 9 or 10 foot walls, which makes rooms feel larger and allows for loft storage.
New construction also avoids some retrofit costs. Running electrical through existing walls, re-framing a sagging roof, and leveling a cracked slab can eat the savings on the worst-condition garages. On a garage in good shape, conversion almost always wins on price. On a garage that is falling down, a fresh build often costs less than a full rebuild of the existing shell.
How to Save on a Garage Conversion ADU
Saving money on an ADU does not mean cutting corners on structure or plumbing. It means making choices that reduce labor and materials without sacrificing durability. Here is what actually moves the number in Dallas.
- Keep the bathroom near existing plumbing. The closer the toilet and sink sit to the sewer line, the shorter the trenching run, the lower the cost.
- Choose a mini-split over ducted HVAC. Dallas summers require real cooling, but a ductless system handles a 400 to 700 square foot ADU and costs thousands less to install.
- Go with a kitchenette instead of a full kitchen. A two-burner cooktop, a compact refrigerator, and a prep sink satisfy most renters and can cut $15,000 to $25,000 from the budget.
- Use stock cabinets and standard tile. Custom cabinetry and imported tile add weeks to lead time and thousands to the price. Stock options look clean and hold up.
- Skip the garage door replacement. Some conversions keep the existing roll-up door and build a wall behind it. That saves $2,000 to $5,000 compared to removing the door and framing a new wall with windows.
- Get a written price before you commit. Reputable Dallas ADU builders give a fixed written quote after a site visit. If someone gives you a verbal number, you do not yet have a price.
We give every Dallas homeowner a written price before any work starts. That is not a promotion. It is how The Kingswell Way works. Call (361) 204-4652 and we will come out, look at your garage, and put a real number in writing.
Is a Garage Conversion ADU Worth the Investment?
A Dallas garage conversion ADU can generate $1,200 to $1,800 per month in rental income for a one-bedroom unit in most central neighborhoods, or serve as a home office, guest suite, or multigenerational space for aging parents or adult children. At the low end of the rental range, the unit covers its mortgage-equivalent cost in five to seven years. Beyond cash flow, an ADU adds appraised value to the property, though the exact lift varies by neighborhood and condition.
In hot Dallas rental markets like Bishop Arts, Lower Greenville, and the M Streets corridor, one-bedroom ADUs rent fast and often above asking. Parking matters too: units with a dedicated off-street space command a $100 to $200 monthly premium.
The Kingswell Guarantee on Every Project
The Kingswell family runs Lodgewick ADU Builders the same way across every project: written price first, a real arrival window, a clean job site at the end of every day, and a written guarantee before work begins. The 365-Day Done Right Promise covers the work for a full year. If something is not right, we come back and make it right. That commitment is in writing, on every project, delivered before a single nail goes in.
We also answer the phone. A live person, 24 hours a day, 7 days a week. Not a voicemail. Not a chatbot. When you call (361) 204-4652 with questions about your build or your guarantee, someone picks up.
Why Dallas Homeowners Choose Lodgewick ADU Builders
Lodgewick ADU Builders has been building accessory dwelling units, garage conversions, and home additions since 2010 as part of the Kingswell family of home-service companies. Russ Delmar leads the Dallas team, and every technician on a Lodgewick job site is background-checked and uniformed, so you always know who is on your property.
We are hands-on with the leading ADU brands and materials including Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie. We match the right product to your lot, your budget, and your timeline. If the site calls for a custom stick-built conversion, that is what we build. If a prefab unit fits better, we say so and handle the site work, utilities, and permits to support it.
The name Lodgewick says it plainly. A lodge is a small house on a larger property. That is exactly what an ADU is. A small, livable home added to the land you already own.
FAQs – Garage Conversion ADU Cost in Dallas
How much does a garage conversion ADU cost in Dallas, Texas?
A garage conversion ADU in Dallas costs $95,000 to $165,000 for a typical one-bedroom unit with a kitchen and bathroom in 2026. Smaller studio conversions without a full kitchen range from $70,000 to $110,000, while larger two-bedroom units with premium finishes reach $195,000 or more. Call (361) 204-4652 for an exact quote on your garage. Estimates are free.
Is it cheaper to convert a garage or build a new ADU in Dallas?
Converting an existing garage is $30,000 to $80,000 cheaper than building a new detached ADU of the same size in Dallas. A new one-bedroom ADU runs $180,000 to $280,000, while a garage conversion of the same footprint runs $95,000 to $165,000. The exception is a garage in very poor structural condition, where full rebuild costs can equal new construction. We will tell you which path costs less on your lot.
How long does a garage conversion ADU take in Dallas?
A standard garage conversion ADU in Dallas takes three to five months from permit submittal to final inspection, with four to eight weeks of design and permitting before construction begins. Larger units or those needing foundation repair run six to eight months. Prefab ADUs install faster, but utility connections and site work still take two to three months.
Does a garage conversion ADU add value to a Dallas home?
A garage conversion ADU adds both rental income and appraised property value in Dallas. One-bedroom ADUs in central Dallas neighborhoods rent for $1,200 to $1,800 per month. In high-demand areas like Lower Greenville, Bishop Arts, and the M Streets, units with off-street parking rent at a $100 to $200 monthly premium over comps without parking.
What permits are required for a garage conversion ADU in Dallas?
The City of Dallas requires building, mechanical, electrical, and plumbing permits for any garage conversion ADU. Permit and impact fees typically total $3,500 to $8,500, and the timeline runs six to twelve weeks. Dallas code also requires egress windows in every ADU bedroom, which means cutting new window openings in most garage conversions. Lodgewick ADU Dallas handles the full permit package for our clients.
Can you come today to give me a garage conversion estimate?
In most cases, yes. We schedule free estimates across Dallas County five days a week, and a live person answers our phones 24/7 to find the soonest window that works for you. Call (361) 204-4652 and we will put a written price in front of you after a site visit, no cost and no obligation.
Get a Written Price on Your Dallas Garage Conversion
If you own a home in Dallas and want more livable space on your lot, start with a real number. We will come out, inspect the garage, check the slab, trace the utilities, and give you a written price before any work starts. From Lakewood to Preston Hollow, from Oak Cliff to Casa Linda, we build ADUs that hold up through Dallas summers and add real value to the property.
Call (361) 204-4652 for a free estimate. A live person answers, day or night. Or stop by our home page to see recent Dallas ADU work and learn more about The Kingswell Guarantee.
Pricing reflects the Dallas market as of 2026. Lodgewick ADU Dallas offers free estimates – call (361) 204-4652.
Written by Russ Delmar, Owner at Lodgewick ADU Dallas, serving Dallas since 2010.
What Our Customers Say
"Solid build on a home addition. The permit stage dragged, which held things up a few weeks. They were upfront it was out of their hands and the construction itself moved fast and clean."
- Douglas Fenwick"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills"Added a bedroom and bath for our growing family. Honest from day one about what was possible and what it would cost. Showed up when they said and the work has held up great."
- Troy Benavidez
