A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Home Addition Contractor Across Dallas
A home addition in Dallas runs $180 to $420 per square foot depending on scope, and a standard 400-square-foot room addition typically lands between $72,000 and $168,000 before finishes. We price the job in writing before work starts, so you’re not guessing. Our ADU Builders in Dallas serve the whole metro, from Lakewood to Preston Hollow to Bishop Arts, and our crews know this city’s soil, permits, and housing stock. Call (361) 204-4652 for a free, honest estimate.
Why Lodgewick ADU Dallas Is Dallas’s Preferred Home Addition Contractor Company
We’re the ADU company of the Kingswell family, and every project here in Dallas runs under The Kingswell Guarantee: a written price before work begins, a defined arrival window, a clean job site, and a written guarantee on every job. If the work isn’t right within 365 days, we come back and make it right. That commitment is in writing, on every project, before a single nail is driven.
Russ Delmar leads our Dallas team. He’s walked countless Dallas lots, from the pier-and-beam bungalows in Lakewood to the slab-on-grade ranches in Richardson and Garland. Homeowners here have been burned before, by a price that changed at the door or a crew that never showed. We say the price before the work, show up in the window we give, and leave the place cleaner than we found it. That’s The Kingswell Way.
Background-checked, uniformed technicians are on every Dallas job site, so you always know who’s on your property. And when you call with a question about your build or your guarantee, a live person answers 24/7. No voicemail loops.
How Much Does a Home Addition Cost in Dallas, TX?
A home addition in Dallas costs $180 – $420 per square foot, with most homeowners spending $110,000 – $190,000 for a full room addition with finishes. A bump-out addition runs $30,000 – $65,000. A second-story addition, the most expensive option, starts around $200 per square foot and often exceeds $250,000 because it requires structural reinforcement of the existing footprint. These are Dallas market numbers, not national averages, and they account for local permit fees, soils reports, and the labor rates our crews see across the metro.
| Addition Type | Typical Dallas Range | Notes |
|---|---|---|
| Room Addition (400 sq ft) | $72,000 – $168,000 | Includes framing, roof tie-in, HVAC, finishes |
| Bump-Out Addition | $30,000 – $65,000 | Smaller footprint, often kitchen or bath expansion |
| Sunroom Addition | $45,000 – $110,000 | Heated/cooled adds $15K – $30K over a three-season room |
| Second Story Addition | $200,000 – $350,000+ | Requires structural upgrades and full re-roof |
| Garage Addition | $40,000 – $95,000 | New build or conversion of attached space |
Call (361) 204-4652 for a written line-item quote. Estimates are free, and the number we give you is the number we honor.
Permits, Soils, and the Dallas Building Code
Dallas requires a separate building permit for any addition over 200 square feet. Because much of the city sits on expansive clay soil, foundation work usually needs a soils report before the permit can even be issued. That’s different from Fort Worth just to the west, where similar additions on more stable sandy loam often skip that step entirely.
A soils report in Dallas runs $1,500 – $3,500 depending on the lot and depth of testing. It’s not optional. A contractor who skips the soils test on a slab addition is gambling with your foundation. Dallas clay shrinks and swells with moisture, and a standard footing that works fine in other Texas cities can fail here within two years. The new room begins to separate at the seam. We’ve seen it. We’ve also fixed it.
As a Home Addition Contractor team, we handle permits, soils reports, and inspections as part of every project. The price you get includes those steps, in writing.
Sunroom Addition in Dallas
A sunroom addition in Dallas typically runs $45,000 to $110,000 depending on whether it’s a three-season room or a heated-and-cooled space tied into your existing HVAC system. The heated-and-cooled version adds $15,000 to $30,000 over a basic room because Dallas permits classify it differently: once permanent climate control goes in, it’s a room addition, not a sunroom, and that changes the permit path and the inspection schedule.
Older Bungalows in Lakewood, M Streets, and Casa Linda
Many Dallas sunrooms go onto homes built between 1920 and 1960. Those pier-and-beam foundations have settled. We inspect first. We underpinned a corner on a recent Lakewood project, then framed the room with James Hardie siding to match the 1940s exterior. That’s the difference between a sunroom that lasts and one that leaks at the seam.
Three-Season vs. Heated and Cooled
A three-season sunroom doesn’t require a full building permit in all cases, but a heated-and-cooled room always does. Trying to list a permanent HVAC connection as a “sunroom” to avoid stricter requirements gets flagged by inspectors. The project stops for a permit revision, and you pay for the delay. We file the right permit the first time.
Room Addition Contractor in Dallas
A room addition contractor in Dallas should quote you a written price that accounts for the existing roof line, foundation, and the city’s permit requirements before work starts. Too many homeowners get a phone quote, then learn mid-project that the roof must be reframed to tie into the addition. That’s a $15,000 change order. A Home Addition Contractor who hasn’t walked your lot can’t see that coming.
Foundation Work on Expansive Clay
Dallas soil is the biggest cost variable in any room addition. We’ve added rooms in Preston Hollow, Oak Cliff, and Far North Dallas, and every lot behaves differently. A soils report tells us what’s underneath, and the foundation plan follows. That report is part of our scope, not an add-on fee.
Roof Tie-Ins and Matching the Existing Exterior
Tying a new roof into an existing Dallas home is where quotes fall apart. The roofline, the flashing, the fascia, and the siding all have to line up. We spec materials like James Hardie siding to match what’s already on the house. The goal isn’t a box bolted to the side, it’s an addition that looks like it was always there.
Trusted Brands We Service in Dallas
Our Dallas crews work with leading prefab manufacturers and material suppliers, including Boxabl, Plant Prefab, Tuff Shed, and James Hardie, and we offer Dallas Dvele service as well. If you’re weighing a prefab unit against a stick-built addition, we can walk through the tradeoffs for your specific lot. We keep local access to these materials through our metro suppliers, which shortens lead times for Dallas customers. The right brand depends on your foundation, your setback, and your budget. We’ll tell you straight which one fits.
Common Home Addition Contractor Problems We See in Dallas Homes
- Soil test skipped. A contractor assumes standard footings because that worked in another city. Two years later the new room separates at the seam as Dallas clay shrinks and swells. The fix costs more than the addition.
- Phone quote, then a $15,000 change order. The existing roof line has to be reframed to tie into the addition, but nobody saw it because nobody visited the site. We don’t quote without walking the lot.
- Wrong permit filed. The addition is listed as a sunroom to avoid stricter room-addition requirements, but an inspector flags the permanent HVAC connection and the project stops for a revision. That’s weeks of delay and extra fees.
- Foundation settlement ignored. Older Dallas homes in Lakewood, M Streets, and Oak Cliff sit on pier-and-beam that has settled an inch or more. Adding a room without addressing that creates a visible seam and water intrusion at the transition point.
Pricing for Home Addition Contractor in Dallas, TX
Dallas pricing runs $180 – $420 per square foot, and the range is tight because of real variables: soils reports, permit fees, foundation repair, roof tie-ins, and the finish level you choose. A basic bump-out at $30,000 and a full second-story build at $250,000 are both real numbers we’ve written on Dallas contracts. What changes the price once work starts should be almost nothing. We put the price in writing before any work begins, and we don’t change it at the door. Call (361) 204-4652 for a free estimate with a line item for every dollar.
We Also Serve Cities Near Dallas
Lodgewick ADU Dallas serves the full metro. Beyond Dallas proper, our crews handle additions in Duncanville, Balch Springs, Addison, and Grand Prairie. Scheduling is coordinated from our Dallas-Fort Worth office, and crews dispatch locally. If you’re just outside the city line, call (361) 204-4652 and we’ll confirm coverage for your neighborhood.
Serving Dallas, TX - Our Local Coverage Area
We’re based in the Dallas area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Home Addition Contractor in Dallas
Dallas requires a soils report for additions over 200 square feet on most lots, especially where expansive clay is present. It’s not limited to new builds. The city’s building official can require one for any foundation work, and most addition permits on slab-on-grade lots in Dallas need it before the permit is issued. Call (361) 204-4652 and we’ll tell you what your specific lot needs, free.
If the sunroom gets permanent heating or cooling, it’s classified as a room addition under Dallas code, not a sunroom. That means a full building permit with structural review, not the simpler sunroom path. Filing it as a sunroom to avoid that review gets flagged at inspection, and the project stops. We file the right permit from day one. Call (361) 204-4652 to get your project scoped correctly.
Plan on 4 to 7 months for a standard room addition in Dallas. The soils report and permit issuance typically take 4 to 8 weeks, foundation and framing 6 to 10 weeks, and mechanical, finishes, and inspections another 6 to 10 weeks. Weather delays and inspection scheduling can push it longer. We give you a written timeline with the estimate, not a vague promise.
The honest answer: almost nothing should, if the contractor did the site visit and the soils work up front. The legitimate changes are hidden conditions like unexpected foundation damage or code upgrades the inspector requires. That’s why we walk every Dallas lot before quoting and include the soils report in the scope. Our written price is the price. Call (361) 204-4652 for a quote that holds.
Yes, but an attached prefab unit still triggers the same Dallas permit and soils-report requirements as a stick-built addition if it exceeds 200 square feet or ties into your home’s systems. Boxabl and Plant Prefab units can be configured for attached installation, but the foundation, tie-in, and inspection path doesn’t get easier. We work with these brands and can tell you what’s realistic for your lot. Call (361) 204-4652 and we’ll walk you through it.
Get a Written Price for Your Dallas Home Addition
Lodgewick ADU Dallas puts the price in writing before any work starts. No door-step changes. No phone quotes without a site visit. No skipped soils reports. We’re the ADU company of the Kingswell family, and every build runs under The Kingswell Guarantee: written price, real arrival window, clean job site, written guarantee. Call (361) 204-4652 and schedule your free estimate today.
Written by Russ Delmar, Owner at Lodgewick ADU Dallas, serving Dallas and the surrounding metro since 2010.
