Williamson County · North Austin Suburb

High Performance Custom Home Builder
Round Rock, TX

ICF construction, net-zero energy, advanced energy performance standards — the most advanced custom home building program in Williamson County.

Built for Round Rock

Why Round Rock Homeowners Choose ATB

Round Rock consistently records some of the highest summer temperatures in the Austin metro, making thermal mass and ICF's superior R-values especially valuable. Energy bills in Round Rock wood-frame homes routinely spike — ICF construction reduces cooling loads dramatically.

Austin Touchstone Builders brings a credential stack few local builders can match: Certified ICF builder, DOE Zero Energy Ready Partner, Certified Passive House Builder, and 2026 ICF Builder Award winner. When you build with ATB in Round Rock, you're getting a home engineered to outperform conventional construction in every measurable category — energy use, structural durability, indoor air quality, and long-term cost of ownership.

Start Your Round Rock Project Call 512-428-6224
High Performance Custom Home Builder Round Rock TX - Austin Touchstone Builders
ICF
Construction
DOE
Zero Energy Ready Partner
2✕
2026 ICF Award Winner
250mph
Wind Resistance
Our Approach

What Makes a Home High Performance?

In Round Rock's climate — hot summers, severe hailstorms and extreme heat, and rising energy costs — a high-performance home isn't a luxury. It's the smarter long-term investment.

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ICF Construction

Insulated Concrete Form walls form the backbone of every ATB home. With a 6" concrete core surrounded by continuous EPS foam, ICF walls deliver R-values of 40–50+, virtually zero air infiltration, and structural capacity to resist hailstorms and extreme heat and beyond. No wood-frame home can compete.

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Net-Zero Energy

Our homes are designed to produce as much energy as they consume annually. For Round Rock homeowners, that means electric bills near zero even through Texas summers — achieved through load reduction first (ICF envelope, ERV, right-sized HVAC) then solar production layered on top.

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net-zero ready

As a Green Builder, we build to a certified standard — not a marketing claim. The certification process verifies HERS scores, blower door results, duct leakage, and mechanical system performance. Your home's efficiency is independently verified, not self-reported.

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Air Quality & ERV

An airtight home needs controlled ventilation. We integrate Energy Recovery Ventilators (ERVs) in every build, delivering continuously filtered fresh air while recovering conditioned air energy — keeping indoor air quality high and energy waste low year-round in Round Rock's climate.

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Disaster Resilience

ICF walls are rated to resist 250+ mph wind loads and carry a 4-hour fire resistance rating. Round Rock's exposure to hailstorms and extreme heat makes this directly relevant — not theoretical. When conventional homes in the area sustain major damage, ICF homes stand intact.

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Certified Passive House

Our Passive House certification reflects mastery of thermal bridge-free design, ultra-tight envelopes, and mechanical ventilation physics — the most rigorous building performance standard in the world. Few custom builders in Round Rock holds this credential.

The ATB Difference

Not All "High Performance" Is Equal

Many builders use the phrase. Few can back it up with certifications, awards, and a verifiable construction system.

Credential ATB Most Competitors
ICF Construction ✓ ✗
DOE Zero Energy Ready Partner ✓ ✗
Certified Passive House Builder ✓ ✗
2026 ICF Builder Award ✓ ✗
250 mph Wind Resistance ✓ ✗
Nationwide Consulting ✓ ✗
Where We Build

Serving Round Rock & Surrounding Areas

Cedar Park
Round Rock
Georgetown
Leander
Dripping Springs
Bee Cave
Lakeway
Westlake Hills
Spicewood
Pflugerville
Austin
Lake Travis
Driftwood
Wimberley
Common Questions

FAQ — Building in Round Rock

Do you build custom homes in Round Rock?

Yes. We serve Round Rock and the broader Williamson County area. We build fully custom ICF and high-performance homes on your lot. Contact us to discuss your project and site.

What makes ATB different from other Round Rock custom home builders?

ATB is the only builder in the Austin area combining ICF construction, advanced energy performance standards, and Certified Passive House Builder credentials. We are also 2026 ICF Builder Award and People's Choice Award winners. No other Round Rock builder offers this combination.

How much does a high-performance custom home cost in Round Rock?

High-performance ICF custom homes in the Austin area typically range from $350–$600+ per square foot depending on finish level, site conditions, and complexity. While ICF construction carries a modest premium over conventional framing, the long-term savings in energy costs, insurance, and maintenance typically offset this within 7–12 years.

Does ATB do design-build or build on owner-provided plans?

We work both ways. We can refer you to architects we've worked with who understand high-performance detailing, or we can build from plans you provide. We also offer consulting services for owners and other builders who want our expertise on their projects.

Ready to Build

Start Your Round Rock Project

Tell us about your lot, your goals, and your timeline. We'll tell you exactly what high-performance construction looks like for your specific project.

Get in Touch 512-428-6224