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 Roanoke
Home additions and ADU construction in Roanoke typically run $45,000 to $130,000 for a room addition and $90,000 to $220,000 for a detached ADU, with garage conversions landing between $30,000 and $80,000. Those numbers reflect what we see on actual contracts here, not a national average pulled from a database. We know Roanoke’s post-tension slabs, we know the city’s inspection rhythm along Highway 114, and we know how the Alliance Airport construction boom pulls crews and concrete in every direction. Call (877) 610-1318 and you’ll get Tom Barrett or one of his sons on the line, not a call center.
This town builds fast. A subdivision that was pasture three years ago now has 400 homes and a school. That pace changes how a Home Additions & ADU job gets planned, permitted, and priced here, and we’ve spent nearly three decades learning to read it.
Key Takeaways
- A room addition in Roanoke runs $45,000-$130,000; a new detached ADU runs $90,000-$220,000.
- Roanoke’s shrink-swell clay means slab and drainage details make or break an addition before framing starts.
- Every change order is written and signed before work proceeds. No verbal scope changes, ever.
- Permits are pulled and inspections signed on every eligible job. The inspector works for you.
Why Barrett & Sons Construction Is Roanoke’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998, and his name is on every contract, every permit, and the side of the truck. His sons run crews in Roanoke and across the metro, which means the person who shakes your hand at the estimate is the same person you’ll see at the hardware store on Saturday. You can look up Tom’s name, his address, and his license number before you sign anything. We’d rather you did.
The 90-Day Done Right Promise is printed on every contract. If the work isn’t right, one call brings Tom back to make it right. That’s not a marketing line; it’s the thing that separates an owner-operator from the national outfits that quote one number on the phone and show up with another. Roanoke homeowners tell us the same story: a big-name company promised a price, then the change orders started stacking up. We put every scope, every allowance, and every price change in writing before a single nail moves. An allowance that isn’t on paper is a surprise waiting for a date.
We answer the phone. A live person, 24/7. When a Roanoke homeowner calls at 7 a.m. on a Tuesday, they get a schedule and a straight answer, not a voicemail box.
Our Home Additions & ADU Services in Roanoke
ADU Design & Permitting
Roanoke’s platting and permitting machine moves fast, but it also gets backed up. We have seen water and sewer stub-outs that are only weeks ahead of vertical construction in some of the newer subdivisions south of Highway 114. That means the ADU you want in your backyard on a 76262 lot needs a permit path that accounts for utility coordination early, not as an afterthought. We draw the plans, handle the city submittals, and pull the permits. You get a schedule in writing.
Garage Conversion ADU
A garage conversion in Roanoke runs $30,000 to $80,000, and it’s the most popular ADU path here because most post-2000 production homes have attached garages sized comfortably for a one-bedroom conversion. The catch is the slab. Roanoke sits on Vertisol clay that swells in fall rains and shrinks in summer drought, and a garage slab wasn’t poured with living space in mind. We saw a conversion in a Trophy Club-adjacent neighborhood last year where the original slab had a 1.5-inch differential from the house. That gets addressed before framing, or you’ll feel it in every door frame for the life of the addition.
New Detached ADU
For Roanoke homeowners with the lot depth to spare, a new detached ADU runs $90,000 to $220,000 depending on finish level, foundation requirements, and utility runs. These are the projects where the Alliance Airport boom really shows up in your price. When warehouse and logistics construction is chewing through concrete and framing crews countywide, material lead times and labor rates tick up. We write those numbers into your quote up front, with the allowance on paper, so the price you see at contract is the price you pay at the final walkthrough.
Junior ADU & Interior Conversion
A junior ADU uses existing interior square footage, a spare bedroom with a kitchenette or an upstairs suite with a separate entrance. These come in at the lower end of the home addition range, often $45,000 to $70,000 depending on plumbing scope. Roanoke’s post-tension slab construction means we map the tendons before cutting any concrete for new drain lines. That’s a detail that keeps the foundation intact and the inspector happy.
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 Roanoke
We install materials you can look up, not mystery brands off a van. In Roanoke, that means Simonton and Ply Gem windows on sunrooms and enclosed patios, PGT impact-rated products where the ice storms have taught us what wind-driven freezing rain does to standard glazing. We keep local supplier relationships close enough that a short lead time on a Roanoke job doesn’t turn into a six-week wait. If you’ve seen a brand you like, ask us; we’ll tell you straight whether it belongs on your addition.
Common Home Additions & ADU Problems We See in Roanoke Homes
- Post-tension slab surprises. Almost every home in Roanoke sits on a post-tension slab, and cutting into one without tendon mapping is how foundations get compromised. We map before we cut, on every single project.
- Drainage rework that wasn’t quoted. Adding square footage changes how water moves across a lot. On Roanoke’s clay, that’s not cosmetic. We quote drainage and slab-edge details up front, in writing, not as a surprise change order later.
- Utility stubs that lag construction. In the fast-platted subdivisions of 76262, water and sewer stubs sometimes run only weeks ahead of framing. That coordination with the city adds lead time, and we build it into the schedule from day one.
- Ice-storm damage to unfinished work. Roanoke’s winter hazard isn’t snow, it’s ice. Fresh framing and scaffolding need tarping and thermal protection when a February storm rolls through, and we plan for that in the project timeline so weather doesn’t stall your job for three weeks.
Pricing for Home Additions & ADU in Roanoke, TX
Here are the numbers we write on Roanoke contracts today:
- Room addition: $45,000-$130,000
- New detached ADU: $90,000-$220,000
- Garage conversion ADU: $30,000-$80,000
- Junior ADU or interior conversion: $45,000-$70,000
- Sunroom or enclosed patio: $25,000-$60,000
- Second-story addition: $75,000-$150,000
What moves the price in Roanoke more than anything is soil work and utility coordination. A lot on flat clay with utilities stubbed at the property line costs less to build on than a sloping lot where the sewer line needs a lift station. We’ll give you a line-item written quote so you see exactly where the dollars go. The estimate is free. Call (877) 610-1318 and ask for Tom.
We Also Serve Cities Near Roanoke
Most of our Home Additions & ADU in Roanoke work comes from referrals in Trophy Club, Southlake, Keller, and Lantana, where the same post-tension slabs and the same clay soils keep us busy. If you’re a few exits away on 114 or 377, the drive to you is short, and the quote is free. We also handle Kitchen Remodeling in Roanoke and Bathroom Remodeling in Roanoke for homeowners who want the addition and the refresh done under one contract, one schedule, one set of plans.
Serving Roanoke, TX - Our Local Coverage Area
We’re based in the Roanoke 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 - Home Additions & ADU in Roanoke
A home addition in Roanoke runs $45,000 to $130,000 on average, with second-story additions at the higher end and simple bump-outs at the lower end. Detached ADUs run $90,000 to $220,000. The Roanoke-specific factors that move the number are clay soil remediation, post-tension slab mapping, and utility coordination with the city. Call (877) 610-1318 for a written line-item quote; estimates are free.
Yes, we pull permits and schedule inspections on every eligible job in Roanoke. The permit inspector works for you, not for me; that’s why I like him. If a contractor tells you permits are optional on an addition, walk away and call us.
Only if you change the scope. Every allowance and every price change arrives as a written change order before any work happens. No verbal changes, no end-of-job surprise invoice. That’s the Barrett & Sons standard, and it’s written into the contract.
A room addition typically takes 3 to 5 months from permit to final inspection; a detached ADU runs 6 to 9 months. Roanoke’s city inspection scheduling and the labor competition from the Alliance Airport construction corridor can add a few weeks. We give you a written schedule at contract and update it as the job moves.
Yes. Seniors and veterans get a permanent 10% discount, we offer $40 off any repair over $200, a free second opinion on any written estimate, and no trip charge inside the county. Ask about all four when you call (877) 610-1318.
Get Your Free Roanoke Home Addition Estimate
If you’re weighing an addition, a garage conversion, or a detached ADU in Roanoke, start with a conversation. We’ll walk your lot, look at your slab, check your utility stubs, and give you a written quote with numbers you can verify. Tom Barrett answers the phone. The crew that builds your addition carries his name. And if it’s not right, he comes back and makes it right. That’s the deal.
Call (877) 610-1318 to schedule your free estimate today.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Roanoke and the DFW metro since 1998.