Hempcrete, a bio-composite made from hemp hurds and lime, is now officially part of the Austin building code as of July 2025. It’s being embraced by Austin builders, architects, and homeowners looking to create more sustainable, energy-efficient homes. At Holley Homes Realty, we believe in keeping buyers and sellers informed about the latest trends—and this one could impact everything from property values to long-term homeownership goals.
Hempcrete is not a structural material like traditional concrete. Instead, it’s used as an insulating wall system—often in combination with timber framing. It offers high thermal resistance, is pest- and mold-resistant, and can help regulate indoor humidity.
- Carbon-negative material: It sequesters CO2 during curing
- Highly insulating and energy-efficient
- Non-toxic, breathable, and mold-resistant
- Durable and fire-resistant
- Contributes to healthier indoor air quality
- Not load-bearing—requires framing
- Higher upfront construction costs
- Slower build time due to curing
- Fewer experienced trades in the U.S. compared to traditional methods
In April 2025, the City of Austin adopted Appendix BL from the 2024 International Residential Code, providing clear guidelines for hempcrete construction. By July 2025, these standards became enforceable, making it significantly easier for builders and architects to use hemp-lime systems.
Austin, Texas continues to lead in green building, and this material fits into the city’s broader climate goals. For buyers looking to own energy-efficient homes in areas like 78748 or 78745, or for sellers wondering how green upgrades impact resale—hempcrete might be a key differentiator in the years to come.
If you’re considering buying a home built with hempcrete, ask these questions:
- Was the construction permitted under the new code?
- Who was the builder, and what’s their experience?
- How does the thermal performance impact energy bills?
As for sellers, highlighting hempcrete in listings could appeal to eco-conscious buyers in hot ZIP codes like 78749, 78640, and 78617.
"Austin’s housing future is shifting—toward sustainability, efficiency, and smarter design. Hempcrete isn’t a fad; it’s a glimpse of what’s next. And I’m here to help clients stay ahead of the curve." – Brandon Holley, Holley Homes Realty
- Tour existing hempcrete homes in Austin
- Connect with green-certified builders in Central Texas
- Explore financing options for sustainable builds
- Request a home valuation to compare hempcrete vs. traditional resale potential
Hempcrete homes are no longer a fringe idea—they’re part of Austin’s building future. Whether you’re a buyer looking for a healthier, greener home or a seller wanting to maximize your property's eco value, let’s talk about how this trend affects your goals.
Brandon Holley | Broker/Owner | Holley Homes Realty 512.487.9242 | brandon@holleyhomesrealty.com
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