Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Dallas
Most Dallas roofing and home addition customers who call us are standing in a house that no longer fits their life. Maybe a parent moved in, maybe a son came back after college, maybe the third bedroom has become an office with a crib in it. A home addition or ADU in Dallas typically runs between $45,000 and $130,000 depending on scope, and the real question isn’t the price, it’s whether the foundation will still be sound in five years. That’s the part we lose sleep over so you don’t have to. Call (877) 610-1318 and we’ll walk your lot together and tell you straight what’s possible, what’s smart, and what we’d skip if it were our money.
Why Barrett & Sons Construction Is Dallas’s Preferred Home Additions & ADU Company
We’ve been at this since 1998, and Tom Barrett still answers the phone himself. That matters more in Dallas than most places because so many contractors here come and go with the building booms. We’re not a franchise and we don’t dispatch strangers. Tom’s sons run the crews, and most of the people who show up to your jobsite have known each other for years.
Dallas homeowners call us because we pull permits on every eligible job and get every inspection signed. The permit inspector works for you, not for me, and that’s exactly why I like him. If you’ve been burned before by someone who said permits were optional, you already know the difference. We put every scope, every allowance, every price change in writing before a single nail moves. An allowance that isn’t on paper is a surprise waiting for a date. That’s how we’ve built our name across Dallas, one signed change order at a time.
Our Home Additions & ADU Services in Dallas
ADU Design & Permitting
Dallas sits on some of the most aggressively expansive black clay soil in the country. The clay swells and contracts inches seasonally as North Texas cycles through drought and heavy rain. Before we draw a single ADU line, we’re looking at how water moves across your lot and what your existing slab is doing. Post-tensioned slab foundations are the Dallas default, and they change everything about how you design and permit an addition. We handle the full permit package so you’re not standing at the Development Services counter trying to explain a soil report.
Garage Conversion ADU
A garage conversion in Dallas runs between $30,000 and $80,000 and is often the fastest path to a rentable unit or a private space for family. Most garages here were built on slabs tied to the house, but plenty of older ones were poured thin and unengineered. We check what you actually have before pricing the work. In neighborhoods like Oak Cliff and Kessler Park, where 1920s and 1950s bungalows still hold whole blocks, a garage conversion usually means running new electrical, replacing galvanized plumbing, and lifting the floor to meet code. This is where our Home Additions & ADU team earns its keep.
New Detached ADU
A new detached ADU in Dallas typically runs $90,000 to $220,000 all-in. That number includes the foundation work the clay demands, and if someone quotes you half that, ask how they’re handling soil movement. We engineer for post-tensioned slabs or pier-and-beam depending on your lot, and we build with materials you can look up, not mystery brands off a van. The summer heat here compresses concrete cure windows and pushes crews into early-morning pours, which you should plan for if you’re working toward a rental timeline.
Junior ADU & Interior Conversion
A junior ADU, usually a converted second-story landing, attic, or oversized interior room, can run anywhere from $45,000 to $90,000 depending on plumbing and egress work. In Dallas ZIP codes like 75204 and 75206, where teardown and infill construction is everywhere, we’re seeing more homeowners take this route instead of fighting narrow-lot setback rules. A junior ADU can’t always be rented separately, but it can give a parent or adult child real privacy without moving walls. We’ll tell you honestly whether your layout supports one before you spend a dollar on drawings.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Dallas
We install materials from Techo-Bloc, Cambridge Pavers, and Oldcastle on outdoor and hardscape-tied projects, and we keep local supplier relationships across Dallas-including our Dallas Belgard service-so ordering doesn’t stall a schedule. When an ADU includes a small patio or driveway extension, we’re pulling from the same Dallas distributors we’ve used for years, not whatever’s left in a national warehouse. Quikrete shows up on plenty of Dallas jobsites for footings and minor pours, and we spec it where it makes sense. You get named brands you can research before you sign, because that’s how you know what you’re actually paying for.
Common Home Additions & ADU Problems We See in Dallas Homes
- Black gumbo soil shifting the slab: Dallas clay swells in wet seasons and shrinks in droughts, and we regularly see additions where the new foundation is fine but the old one has moved two inches out of plane. We plan drainage and foundation ties before framing ever starts.
- Post-tensioned cable strikes during saw-cutting: Dallas slabs contain high-tension steel cables, and cutting into one can be catastrophically dangerous. We locate and mark every cable before any cut, which is not something every contractor in town bothers to do.
- 1960s-era framing that doesn’t meet current code: In older Dallas neighborhoods, we find roof structures and wall framing that were never designed for the loads a modern addition requires. Bringing it up to code means honest conversations about scope, not surprise invoices later.
- Galvanized plumbing and outdated electrical: Most pre-1980 Dallas homes are running on galvanized lines and panels that can’t keep up with a new ADU’s demand. We factor this into the estimate up front so you’re not paying for a discovery you didn’t approve.
How Much Does a Home Addition or ADU Cost in Dallas, TX?
A room addition in Dallas runs $45,000 to $130,000, and a detached ADU is $90,000 to $220,000 depending on size, foundation, and finish level. Garage conversions sit between $30,000 and $80,000. What moves the number in Dallas specifically is your soil, your lot access, and whether you need a post-tensioned slab or a pier-and-beam crawlspace. A second-story addition costs more than a ground-floor bump-out, not because the square footage is precious, but because you’re asking the existing structure to carry more weight on clay that’s already testing it. We give a fixed-price quote with line items, and if anything changes, you get a written change order before work proceeds. Call (877) 610-1318 for a free estimate. No surprise invoice ever follows our work.
You May Also Need These Services in Dallas
An addition often comes with a kitchen that suddenly feels too small, which is why we also handle Kitchen Remodeling in Dallas. And when the new ADU goes in, the main house’s bathroom is usually next on the list, so we’re ready with Bathroom Remodeling in Dallas as well. We do all of it under the same roof and the same 90-Day Done Right Promise.
We Also Serve Cities Near Dallas
Beyond Dallas proper, we work regularly in Highland Park, University Park, Richardson, and Irving. Each has its own building department, its own setback quirks, and its own soil conditions, and we’ve pulled permits in all of them. If you’re anywhere in that orbit, the drive is short and the answer is the same: call (877) 610-1318 and Tom will talk you through it.
Serving Dallas, TX - Our Local Coverage Area
We’re based in the Dallas area and know this community well, from windows & doors in Dallas to full additions. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Dallas
For most Dallas additions, we can start structural work within three to six weeks of signing, depending on permit review times and whether you need a soil report. Foundation and framing go faster than finish work, and summer heat may adjust crew hours. Call (877) 610-1318 and we’ll give you a real timeline for your specific scope.
Yes, we serve all of Dallas, including ZIP codes 75221, 75222, 75223, and 75224, plus neighborhoods like Oak Cliff, Kessler Park, and the infill-heavy corridors in 75201 and 75204. If you’re in Dallas proper, you’re in our service area, and there’s no trip charge inside the county.
Generally not. Dallas pricing tracks with the suburbs because the biggest cost drivers are the same: expansive clay foundation work, permit requirements, and labor. A detached ADU in Dallas runs $90,000 to $220,000, which is in line with Highland Park and Richardson. We price by your site conditions, not your ZIP code’s prestige.
Only if the scope changes, and every change comes as a written change order before any work happens. You approve the number before it’s spent. We don’t hand you a different bill at the door. That’s been our rule since 1998, and it’s why Dallas homeowners bring us back for a second project.
Yes, on every eligible job. We pull permits and get inspections signed because the inspector works for you, not for us. If a contractor tells you permits are optional on a Dallas addition, walk away. That path leads to uninsurable square footage and a resale headache. Call (877) 610-1318 and ask us anything about the permit process before you sign.
Schedule Your Free Home Addition Estimate in Dallas
If you live in Dallas and you’re serious about adding space, call Tom Barrett directly at (877) 610-1318. He’ll answer, or someone on the team will, and you won’t get a scripted pitch. You’ll get straight answers about your lot, your foundation, and what your addition should cost. Free second opinions on any written estimate. Ten percent off for seniors and veterans. The 90-Day Done Right Promise on every job, in writing. If it’s not done right, Tom comes back. One call and you’ll know exactly where you stand.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Dallas homeowners since 1998.