







A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Wells Branch, TX
Wells Branch sits in Travis County’s extraterritorial jurisdiction, which means ADU work here runs through county permitting rather than City of Austin review. The housing stock tells the story: 1970s-to-1990s homes on 6,000 to 9,000 square foot lots, many with undersized water services and aging cast iron waste lines. Those two facts shape almost every ADU and addition we price in Wells Branch. Call (361) 309-9568 to talk through what your lot can support.
Why Wells Branch Homes Are Different

In Wells Branch, the constraint is rarely zoning. Most lots have room for a detached ADU or a room addition under current Travis County setback rules. What stops projects is infrastructure. Many original homes here run 3/4″ or 1″ water service lines, and an ADU typically requires upsizing to 1″ or larger to pass inspection. Older cast iron waste lines, common in this housing generation, often need replacement or relining where the new structure ties in. We see this on nearly every full-size ADU in Wells Branch.
The Municipal Utility District adds another layer: water and wastewater capacity fees for an ADU can exceed $5,000, and the MUD’s will-serve letter is often the first document a designer should request before plans are finalized. Summers here are hot and humid, so we detail high-efficiency cooling into every ADU envelope. Winter freezes, when they come, are hard on exposed plumbing, so we insulate and route lines with freeze protection rather than treating it as an afterthought. Flat and low-slope roofs on additions get extra attention to flashing and drainage because ice buildup during a rare freeze can find every weak seam.
Our Main Wells Branch Services
Most Wells Branch homeowners reach out about one of three projects: converting an attached garage into living space, building a detached ADU in the backyard, or adding square footage onto the existing house. Each has its own page here because the details differ enough to matter.
Room Addition Contractor in Wells Branch
A room addition in Wells Branch usually means working around a slab or pier-and-beam foundation from the 1980s or 1990s, tying new framing into existing roof lines, and matching siding that has decades of sun exposure. We check water service capacity early, because adding a bathroom or a second kitchen can trigger the same upsizing work that a full ADU requires. See the full scope and pricing on our Room Addition Contractor in Wells Branch page.

Garage Conversion Contractor in Wells Branch
Garage conversions in Wells Branch are popular because the structure already exists, which keeps cost per square foot lower than new construction. But the existing slab often needs leveling or a moisture barrier, and the garage door wall has to be rebuilt correctly to hold insulation, windows, and a conditioned envelope. Travis County permitting applies, and the MUD will-serve letter matters here too if you’re adding a bathroom or kitchenette. Details are on the Garage Conversion Contractor in Wells Branch page.

ADU Builders in Wells Branch
A detached ADU in Wells Branch is the most involved of the three, because it’s a full independent dwelling with its own water, sewer, and electrical connections. We plan around lot size, any easements at the rear of the property, and the capacity fees from the Wells Branch MUD before we finalize a design. Prefab and modular platforms can shorten the build timeline considerably on lots with good access. The full breakdown is on the ADU Builders in Wells Branch page.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Wells Branch
We work with Abodu, Cover, Dvele, and James Hardie siding, among other products. Hardware and finish materials for these systems are ordered regionally and staged before crews arrive in Wells Branch, which keeps most installs on schedule without waiting on parts. See our brands for the full list.
Pricing for ADU Company in Wells Branch, TX
| Service | Typical range in Wells Branch |
|---|---|
| Detached ADU (full build) | $180,000 – $320,000 |
| Prefab ADU (Abodu, Cover, Dvele) | $150,000 – $280,000 |
| Garage conversion to living space | $70,000 – $140,000 |
| Room addition (bedroom or office) | $60,000 – $110,000 |
| Room addition with bathroom | $90,000 – $160,000 |
| Water service upsizing (3/4″ to 1″+ | $4,000 – $9,000 |
| Cast iron waste line replacement | $5,000 – $12,000 |
| MUD water/wastewater capacity fees | $5,000+ (set by MUD) |
Infrastructure work is the wildcard in Wells Branch. Houses with 3/4″ water lines or failing cast iron waste lines will push a project toward the upper end of these ranges, and the MUD capacity fee lands on top of every ADU that adds a dwelling unit. Our written price goes in your hand before any work starts, so those numbers are known on day one, not discovered mid-project.
Neighborhoods We Serve in Wells Branch
We work throughout Wells Branch, from the older sections nearer Wells Branch Parkway to quieter streets off Merrilltown Drive and the neighborhoods around Katherine Fleischer Park. Crews stage from the Austin area and reach most Wells Branch jobs quickly, with scheduling coordinated around your availability.
- Wells Branch Original Sections
- Merrilltown Drive area
- Near Katherine Fleischer Park
- Wells Branch Parkway corridor
- Owen-Tech and surrounding streets
Service Area – Cities Near Wells Branch
Fielding ADU Builders serves Wells Branch as part of a wider Central Texas footprint. If family owns property nearby or you’re comparing options across the region, we also work in Austin, TX, Georgetown, TX, Pflugerville, TX, and San Marcos, TX. Call the same number for any of these locations.
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 About ADU Company in Wells Branch

We prepare and submit plans for Travis County review and handle the Wells Branch MUD will-serve letter and capacity fee paperwork as part of a permitted build. Permits are pulled before we start, and the work passes inspection before we call it done. Call (361) 309-9568 for a free estimate that includes a permitting walk-through.
Once you approve the written price, we order the MUD will-serve letter and begin permit drawings. Design and county review typically take four to eight weeks before crews mobilize. Prefab ADUs can shorten the on-site phase but the permit timeline in Wells Branch stays roughly the same. Call to talk through a realistic dates.
The estimate is free. We put together a written price and flag feasibility constraints like water service size and MUD capacity fees before you commit to anything. Call (361) 309-9568 to schedule the free estimate.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Wells Branch Customers Say
"Good addition. Electrical inspection delayed a week, which was the county, but the build is great."
- Eva K."Room addition over the back patio. Framing is square, windows are tight, and the roofline matches."
- Danny L."Honest feedback on what the lot could fit. Told me up front what would fit on the lot and what the setbacks would allow."
- Rita C.





