A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in New Braunfels, TX
Seedling ADU Builders helps New Braunfels homeowners plan and build accessory dwelling units, garage conversions, and home additions with written pricing before any work starts. This city’s mix of 19th-century German limestone homes, 1960s brick ranches, and brand-new slab-on-grade subdivisions means no two lots behave the same way, and the Guadalupe and Comal rivers add floodplain and drainage considerations most builders never mention. If you’re weighing an ADU on your New Braunfels property, call (210) 981-6358 and we’ll walk you through what’s realistic for your specific lot.
Why New Braunfels Homes Are Different
New Braunfels sits on limestone, and that single fact shapes more ADU decisions than anything else. Drilling pier foundations through rock costs more than pouring a slab in softer soil, and drainage has to be engineered so heavy Hill Country rains move water away from the new structure instead of toward it. Homes near the Guadalupe or Comal rivers often sit in mapped floodplains, which means raised foundations and careful grading are part of the job from day one, not an afterthought.
The housing stock here runs the full range. Historic downtown and the Gruene district hold German limestone and fachwerk homes from the late 1800s, where lot lines are tight and anything you build has to respect historic district design rules. Established neighborhoods like Oakwood Estates and Mission Valley are full of 1960s-to-80s brick ranches that rarely have room for an attached addition, which is why detached backyard units are so common. Then there are the new subdivisions spreading toward the county line, where HOAs often have their own ADU rules on top of the city’s 600-square-foot cap. Ben Ortega and the team at Seedling review all of it before we quote, so the written price reflects what the lot actually needs.
Our Main New Braunfels Services
Most New Braunfels homeowners call us for one of two reasons: adding more livable square footage to an existing home, or building a separate unit in the backyard. Each has its own New Braunfels page with local pricing and specific details.
Home Addition Contractor in New Braunfels
A home addition in New Braunfels usually means tying new slab or pier foundation into an existing home, matching rooflines on houses that range from hundred-year-old German construction to modern builds, and reworking HVAC so the added square footage actually stays comfortable through August. Our Home Addition Contractor in New Braunfels page covers what additions cost here, how permits work, and what to expect day by day. We protect finished floors and keep the work site clean, because your family keeps living in the house while we build.
Garage Conversion Contractor in New Braunfels
Many New Braunfels garages were built in the 1970s and 80s, which means slab thickness, ceiling height, and wall framing vary more than homeowners expect. A garage conversion often calls for new insulation, upgraded electrical, and leveling a slab that has settled into the limestone. The Garage Conversion Contractor in New Braunfels page explains the process step by step, including what the city requires and how we leave your driveway and yard clean at the end of each workday.
ADU Builders in New Braunfels
New Braunfels allows an ADU on the same lot as the primary home, capped at 600 square feet, which makes detached backyard units the practical choice for most families. We build stick-built ADUs and also work with prefab brands like Boxabl and Plant Prefab when a factory-built shell makes sense for your site. The ADU Builders in New Braunfels page lays out local costs, the city’s specific ADU rules, and how the 365-Day Done Right Promise applies to every unit we build.
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 New Braunfels
We install and service ADU shells and materials from Boxabl, Plant Prefab, Tuff Shed, and James Hardie. Parts and finish materials are sourced through our San Antonio supply network, so New Braunfels projects don’t wait on long out-of-state lead times. Visit our brands page to compare what each one offers for Texas lots.
Pricing for ADU Company in New Braunfels, TX
| Service | Typical Range in New Braunfels |
|---|---|
| Detached ADU (under 600 sq ft, stick-built) | $180,000 – $320,000 |
| Detached ADU (prefab, Boxabl or Plant Prefab) | $140,000 – $240,000 |
| Garage conversion (full livable unit) | $90,000 – $180,000 |
| Garage conversion (basic finish, no bath) | $45,000 – $80,000 |
| Home addition (bedroom + bath) | $120,000 – $220,000 |
| Home addition (primary suite) | $140,000 – $260,000 |
| Foundation work (pier drilling, limestone) | $8,000 – $30,000 |
| Drainage and grading correction | $4,000 – $18,000 |
| HVAC sizing and ductwork for new space | $6,000 – $18,000 |
| Historic district design review support | $1,500 – $5,000 |
Limestone drilling, floodplain elevation requirements, and historic district reviews are the three things that push New Braunfels prices above the Texas average. Every Seedling project gets a written price before any work begins, so you’ll know the full number before a single tool is picked up.
Neighborhoods We Serve in New Braunfels
We build across New Braunfels, from the historic downtown streets to the newer subdivisions on the city’s edge. Our crews are local to the area, so response times stay short and we can meet city inspectors without delay.
- Gruene Historic District
- Oakwood Estates
- Mission Valley
- Landa Park area
- New subdivisions along FM 306 and County Line Road
Service Area – Cities Near New Braunfels
Seedling ADU Builders also completes projects in Cibolo, TX, Universal City, TX, and San Antonio, TX. Homeowners further west often reach us through our Boerne, TX page. Every location gets the same written pricing and 365-Day Done Right Promise.
Serving New Braunfels, TX - Our Local Coverage Area
We’re based in the New Braunfels 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 New Braunfels
No. The ADU must sit on the same lot as the primary home and is capped at 600 square feet. Some historic district lots and HOA-governed subdivisions carry additional restrictions. We verify your specific lot against current city code before quoting. Call (210) 981-6358 and we’ll check your address.
Most detached ADU builds run four to seven months from permit approval to final inspection, depending on foundation conditions and prefab versus stick-built. Garage conversions typically take two to four months. We’ll give you a written schedule with the written price. Estimates are free at (210) 981-6358.
Only if the city or your HOA requires something we couldn’t foresee at the time of the quote, and you approve that change in writing before we do the work. No surprise line items. That’s the point of written pricing. Call (210) 981-6358 for an exact number on your project.
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 New Braunfels Customers Say
"Junior ADU conversion inside the house. They were incredibly clean about it, plastic walls, floor protection, daily cleanup, all with a toddler in the home. Couldn't have asked for more care."
- Marcus Oyelaran"They converted our garage and were so mindful that we were living right there through it. Quiet hours respected, site swept, nothing left out where the kids play. Lovely work."
- Eugene Park"Garage conversion into a studio. They sealed off the work area so dust didn't get into the house, and cleaned up every day before leaving. Calm, careful team to have around."
- Darnell Hobbs
