A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Hornsby Bend, TX
Most Hornsby Bend ADU and addition projects hinge on one question: is the lot in the Colorado River floodplain, and what does that mean for the foundation? This semi-rural pocket east of Austin is dominated by large-lot homes from the 1970s through 1990s, many on septic systems, and the floodplain rules here are stricter than what most homeowners expect. We price the work in writing before anything starts, and every project carries the 365-Day Done Right Promise in writing. Call (361) 309-9568 and we’ll walk the lot with you.
Why Hornsby Bend Homes Are Different
Hornsby Bend sits in the Colorado River bottomlands, and that single fact changes nearly every part of an ADU or addition. A large share of properties fall inside the 100-year floodplain, which means Travis County will require raised foundations, flood vents, or both before it signs off. On the west side of Austin you’re anchoring into limestone; here, you’re building on alluvial soil that moves with the river. That’s why pier-and-beam and raised-slab foundations are the default for detached ADUs in Hornsby Bend, not an upsell.
The housing stock adds another layer. Homes from the 1970s to 1990s sit on acreage and oversized lots, with ranch-style and manufactured homes mixed in. Septic systems are common, and Travis County drainage rules determine where an accessory structure can sit and how runoff must be handled. Hot, humid summers mean the HVAC sizing has to account for a structure that will bake in August, and elevated foundations need proper skirting and insulation to stay livable. None of this is exotic to a builder who works Hornsby Bend regularly, but it catches out crews that mostly work in town.
Our Main Hornsby Bend Services
Most Hornsby Bend homeowners call us for one of three jobs: a room addition on the existing house, a garage conversion, or a freestanding backyard ADU. Each has its own Hornsby Bend page with local pricing and specifics.
Room Addition Contractor in Hornsby Bend
A room addition in Hornsby Bend usually means tying new square footage onto a ranch home built 30 to 50 years ago, which requires matching rooflines, foundation height, and often the septic system’s capacity. Floodplain rules can push an addition onto a raised section of the lot or require drainage work before the county approves the final. We price the full job in writing, permit included, before the first nail goes in. Details are on the Room Addition Contractor in Hornsby Bend page.
Garage Conversion Contractor in Hornsby Bend
Garage conversions in Hornsby Bend are a practical way to add living space without expanding the footprint, which matters on lots where the drain field or floodplain setback already limits new construction. The work typically involves framing, insulation, HVAC, and bringing the space up to current Travis County code, and some conversions in this area sit on slab foundations that need moisture checks before flooring goes down. See the Garage Conversion Contractor in Hornsby Bend page for a full cost breakdown.
ADU Builders in Hornsby Bend
A detached ADU in Hornsby Bend is the project where local conditions matter most. Pier-and-beam or raised-slab foundations, flood vents, drainage plans, and septic compatibility all have to line up before the county issues a permit. We build both conventional ADUs with James Hardie siding and prefab or modular units from Abodu, Cover, and Dvele, and we’ll recommend the method that fits your lot and budget. The full scope is on the ADU Builders in Hornsby Bend 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 Hornsby Bend
For conventional builds, we use James Hardie siding and fiber cement trim that holds up to the humidity and sun here better than wood. On the prefab side, we work with Abodu, Cover, and Dvele, and we’ll tell you plainly which platform fits your lot, your timeline, and your budget. See our brands for the full list.
Pricing for ADU Company in Hornsby Bend, TX
| Service | Typical range in Hornsby Bend |
|---|---|
| Room addition (tied to existing home) | $155 – $265 per sq ft |
| Room addition (foundation, roof, and full interior) | $180 – $320 per sq ft |
| Garage conversion (basic finish) | $70 – $120 per sq ft |
| Garage conversion (with plumbing and bathroom) | $110 – $180 per sq ft |
| Detached ADU (conventional build, basic finish) | $190 – $290 per sq ft |
| Detached ADU (prefab or modular, turnkey) | $210 – $350 per sq ft |
| Detached ADU (premium build, kitchen and bath) | $260 – $400 per sq ft |
What pushes a Hornsby Bend price higher is usually the foundation: a pier-and-beam or raised-slab setup with flood vents costs more than a simple slab on grade, but it’s what the county requires in the floodplain. The price we hand you in writing before work starts is the price you pay at the end, no change orders slipped in at the door.
Neighborhoods We Serve in Hornsby Bend
Scheduling in Hornsby Bend works around the lot, not the street. We serve the full area, from the river-adjacent parcels to the larger acreage subdivisions further from the floodplain. Typical response time for estimates in Hornsby Bend runs one to three business days.
- Hornsby Bend proper along the Colorado River
- Webberville Road corridor
- Blue Bluff Road area
- Acreage subdivisions south of FM 969
- Colorado Crossing and surrounding lots
Service Area – Cities Near Hornsby Bend
Fielding ADU Builders coordinates Hornsby Bend work from our Austin office, with crews dispatched locally. We also cover Austin, TX, Georgetown, TX, Pflugerville, TX, and San Marcos, TX. If you’re not sure which service area covers your address, call and ask; someone answers every time.
Serving Hornsby Bend, TX - Our Local Coverage Area
We’re based in the Hornsby Bend 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 Hornsby Bend
We typically schedule the site visit within one to three business days, then deliver a written line-item price shortly after. Hornsby Bend lots require a close look at floodplain maps and drainage before we can finalize numbers. Call (361) 309-9568 to get on the schedule; the estimate costs you nothing.
Yes. We pull the permits, handle the floodplain review, and build to what Travis County actually requires, including raised foundations and flood vents where the lot demands them. We don’t start work until the permit board is clean. Call (361) 309-9568 and we’ll check your address against the flood map before you commit to anything.
It can, especially on the larger lots with older septic systems. We verify septic capacity and drainage requirements as part of the written estimate, so you know before any money changes hands. Call (361) 309-9568 for a free estimate and we’ll walk through what your specific lot allows.
If you’re considering an ADU, garage conversion, or room addition in Hornsby Bend, call (361) 309-9568. We’ll put the price in writing, pull the permits, and stand behind the work for a full year.
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 Hornsby Bend 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.
