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 Wells Branch
Adding square footage or a full ADU to a Wells Branch home costs $45,000-$130,000 for a typical room addition and $90,000-$220,000 for a new detached ADU, depending on scope, site conditions, and what Travis County’s code review turns up once walls come open. Most homeowners in the 78728 ZIP code are working with tract homes built between 1985 and 1995, and that specific era drives our approach: inspection first, allowances in writing, and no surprise starts work without your signature. Our Home Additions & ADU team knows exactly what lives inside these brick-veneer houses off Wells Port Drive and Shoreline Drive, because we have opened enough of them to recognize the failure patterns before the drywall dust settles. Call (877) 610-1318 and we will walk you through what a project on your specific street is likely to cost.
Why Barrett & Sons Construction Is Wells Branch’s Preferred Home Additions & ADU Company
Tom Barrett founded Barrett & Sons Construction in 1998, and since then the company has pulled permits and passed inspections on additions across the north Austin corridor, including a steady run of work right here in Wells Branch. When a local homeowner calls us about a second story addition near the Katherine Fleischer Park side of the neighborhood, the person who answers the phone knows what the Travis County plan review queue looks like this month. Tom’s sons run the crews; the name on the truck is the name that shows up at the estimate, and the name that comes back if anything falls short of the 90-Day Done Right Promise written into every contract.
We have earned a strong local reputation in Wells Branch the slow way: showing up when we said we would, putting every change order in writing before work begins, and letting the Travis County inspector do his job without cutting corners. Scope in writing, allowances in writing, change orders in writing. That matters more in an unincorporated MUD community than it does almost anywhere else, because the permit process here runs through the county rather than a city building department, and the last thing you need is a contractor learning county rules on your dime. Wells Branch homeowners call us back for roof work, windows, and paver driveways, but the deep work, the additions and ADUs, is where our process protects you the most.
Key Takeaways for Wells Branch Homeowners:
- Every eligible job includes permits pulled through Travis County and inspections signed before we call it done.
- Any hidden defect discovered after walls open is priced and approved in writing before we touch it, never billed at the end as a surprise.
- You get a 90-Day Done Right Promise written on the contract, backed by an owner who lives in the area and answers his own phone.
- Free estimates and a no-trip-charge policy inside the county. Senior and veteran customers receive a permanent 10% discount.
Our Home Additions & ADU Services in Wells Branch
The work we do in Wells Branch falls into a few clear buckets. Here is what each one actually looks like on your street.
ADU Design & Permitting
Wells Branch is unincorporated Travis County, which means any ADU, whether attached or detached, goes through Travis County’s permit and inspection process, not a city building department. Plan review timelines differ from Pflugerville or Round Rock, and third-party inspection sign-off is part of the norm here. We handle the entire design and permitting path for you, and we will tell you before you sign anything how the county review schedule will shape your project timeline. A permit inspector who works for the county works for you, not for me, and we build that into the schedule from day one.
New Detached ADU
A new detached ADU in Wells Branch means starting fresh on Blackland clay, and that clay is the defining construction challenge in this neighborhood. The soil swells in Central Texas’s wet cycles and shrinks hard during summer droughts, which is why we insist on soil analysis and proper isolated footings before a single yard of concrete goes in the ground. Detached ADUs also bring their own Travis County requirements for setbacks, utility connections, and fire separation from the main house. We have built them behind existing tract homes on quiet streets throughout the 78728 ZIP code, and we know how to keep the new foundation from arguing with the old slab.
Garage Conversion ADU
Most garages in Wells Branch were built as part of the original 1985-1995 tract package, and they carry the same era’s wiring, framing, and slab behavior. A garage conversion in this neighborhood typically ranges $30,000-$80,000 because opening those walls almost always triggers electrical upgrades and often reveals undersized headers or polybutylene supply lines that the original builder would never have flagged. We treat every garage conversion as a full permit job through Travis County, even when the homeowner initially hoped to keep it quiet. Quiet has a way of becoming expensive later.
Junior ADU & Interior Conversion
For homeowners who need a rentable or in-law space without building new square footage, an interior conversion inside the existing envelope can be the practical path. This often means converting a large bonus room, a two-car garage bay, or restructuring an underused dining room into a self-contained unit with a private entrance. The catch in Wells Branch is that these conversions run straight into the same 1980s-era electrical panels and plumbing rough-ins we see on every block, so an interior conversion here can trigger the same code upgrades as a full addition. We write those allowances into the contract before work starts, because an allowance that isn’t on paper is a surprise waiting for a date.
What happens when you call
- 1
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 Wells Branch
We stock and install named-brand materials that you can look up before we ever cut a check: Schluter for waterproofing on the wet-room side of an ADU, Grohe for fixtures, and GAF for any roofing tied into an addition. The same climate that bakes exterior caulking in the Wells Branch summer also punishes cheap off-brand materials within a few seasons, and we would rather install products with a published engineering spec sheet than mystery stock off the van. Our crews carry what they need for the typical Wells Branch job, and anything we have to order, we order early.
Common Home Additions & ADU Problems We See in Wells Branch Homes
- Post-tension slab heave under new footings. Wells Branch sits on the Blackland Prairie, and the expansive clay here swells and shrinks with rain and drought cycles. A new addition without soil analysis and isolated footings can show cracked slab corners by the first dry season. We soil-test before we pour, every time.
- Polybutylene supply lines failing at the fittings. These 1985-1995 era homes commonly shipped with polybutylene plumbing that is now decades past its expected life. When we open a wall for an addition, we inspect every fitting in the affected run and upgrade to PEX before the drywall closes, so the county inspector’s sign-off covers the new work.
- Electrical panels that will not pass current county inspection. The original 60-amp or 100-amp panels and aluminum branch wiring in many Wells Branch homes fail Travis County code review on any permitted addition. That means a panel replacement is often part of the real scope, and we include that as a written allowance so it never arrives as a surprise invoice.
- Failed original roof decking and undersized load-bearing headers. Because every street in Wells Branch was platted and built under the same MUD developer in roughly the same decade, we often find the same failed decking or undersized header on five consecutive houses on the same block. Discovery happens after framing is exposed, which is exactly why our contracts carry written allowances for hidden defects, not vague promises to “do the right thing.”
Pricing for Home Additions & ADU in Wells Branch, TX
Here is what a Wells Branch homeowner should expect for the most common projects, line by line:
| Project Type | Typical Range |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
The range is wide for a reason. A single ground-floor room addition on a slab in good shape sits at the lower end, while a new detached ADU with its own utility connections, foundation engineering for expansive clay, and full Travis County permit fees climbs toward the top. The biggest cost driver in Wells Branch is usually the hidden condition of the existing structure, not the new square footage itself. That is why we inspect before we quote and write every allowance into the contract. Call (877) 610-1318 for a free, line-item estimate on your specific property; no trip charge inside the county.
We Also Serve Cities Near Wells Branch
Our crews work throughout the north Austin corridor, and homeowners in Wells Branch often ask whether we cover the neighboring towns. We do. We serve Pflugerville, Anderson Mill, Jollyville, and Brushy Creek with the same owner-operated crews and the same written change order process. If you are just outside the 78728 ZIP code, call and ask: the phone is answered by a person, not a voicemail box.
Serving Wells Branch, TX - Our Local Coverage Area
We’re based in the Wells Branch 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 Wells Branch
Opening walls on a 1985-1995 tract home in Wells Branch most often triggers electrical panel and wiring upgrades, since original 60-amp or 100-amp panels and aluminum branch wiring typically fail Travis County inspection on any permitted addition. You may also face plumbing replacement if polybutylene supply lines are found, and structural corrections if the original headers or roof decking were undersized for current code. We inspect for these items before quoting and carry each potential upgrade as a written allowance in your contract, priced and approved before work starts. Call (877) 610-1318 for an exact scope review on your house, free of charge.
Yes, a garage conversion ADU is generally permitted in Wells Branch under Travis County rules, provided the project meets current county standards for setbacks, fire separation, utility connections, and living-space code. The unknown is what the conversion will uncover: most original garages here were built with the same 1980s-era materials as the main house, which frequently means electrical upgrades, slab leveling concerns, and polybutylene plumbing replacement. We price garage conversions in Wells Branch between $30,000 and $80,000, with the final number driven by what inspection and testing reveal. Call (877) 610-1318 and we will walk your specific garage before you commit to anything.
A soil test is required on Wells Branch additions because the neighborhood sits on expansive Blackland clay that swells in wet seasons and shrinks hard in summer droughts, causing post-tension slabs to move. A new foundation poured onto that same clay without analyzing its movement potential can crack at the corners within the first dry season. The test tells our engineer how deep the isolated footings must go and whether a grade beam or void form is needed to keep the addition from fighting the original slab. This is a standard part of our Wells Branch scope; we do not skip it to save a few hundred dollars, because a cracked addition costs far more than the test ever did.
Because Wells Branch is unincorporated Travis County, plan review and inspections run through the county rather than a city building department, and that changes the timeline: plan review takes a number of weeks, inspections are scheduled through the county, and a third party handles some sign-offs. The county process is predictable, but it is not fast, and we build that reality into your schedule before the first nail moves. A second story addition in Wells Branch also carries structural review on your existing slab and framing, since most of these homes were never engineered for a second level when they were built. Call (877) 610-1318 and we will give you a current, honest read on what Travis County’s review queue looks like this month.
A Wells Branch home addition contract should include written allowances for electrical panel replacement, polybutylene plumbing upgrade, undersized header correction, and roof decking repair, because those four items are the ones we consistently discover in homes built between 1985 and 1995. The contract should also spell out how the allowance works: a fixed unit price for each item, approved in writing before any of it is purchased or performed, never as an open-ended hourly bill. That is exactly how Barrett & Sons writes our contracts, and it is the main reason our customers never get a surprise invoice at the end of the job. Call (877) 610-1318 for a free estimate and a contract review.
Call Barrett & Sons Construction for Home Additions & ADU in Wells Branch
If you are planning a room addition, a second story, or an ADU on your Wells Branch property, call (877) 610-1318 to schedule a free estimate. We will walk the site, inspect the existing structure where it matters, and give you a written line-item price with every allowance on paper. Tom Barrett’s name, address, and license number are published and verifiable; look us up before you sign anything, then call us and confirm the number. Ask for the senior or veteran discount if it applies to you. We answer the phone.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Wells Branch and the north Austin corridor since 1998.