A 2,500-square-foot home tucked into the Boise Foothills is drawing attention for what’s inside its walls — literally. The house, named Bitterbrush, was constructed using straw bale walls by EarthCraft Construction Inc., a Boise-based firm that has specialized in the technique since 2000. The property is listed at more than $2.5 million, reflecting both its craftsmanship and the growing niche market for natural building materials in Ada County and across the Treasure Valley.
How Straw Bale Construction Works
The building method is older than most people realize. The first documented straw bale structure was a Nebraska schoolhouse built in 1896 or 1897 — though it was demolished by 1902. Modern straw bale construction has come a long way since then. At Bitterbrush, locally sourced straw — an agricultural byproduct of harvesting cereal grains like barley and wheat from Treasure Valley farms — is stacked on a frame and sandwiched between two layers of clay plaster.
The system is more sophisticated than it sounds. The straw’s outer coating contains a naturally occurring wax layer, and the surrounding clay plaster actively regulates interior humidity by absorbing and releasing moisture into the air. Fire resistance is another key feature: when straw is tightly sealed between plaster walls, oxygen deprivation and the natural compounds in the material make it highly fire-retardant.
Jon Clark, president and CEO of EarthCraft Construction and a U.S. Marine Corps veteran, addressed the most common misconception head-on in a public statement. “A plastered straw bale wall is not loose, fluffy tinder,” he said. Clark also emphasized the long-term perspective behind each build: “We consider the houses we build to be generational assets.”
Clark purchased EarthCraft from its founder, Ron Hixson, in 2018. Hixson has been building homes across the Pacific Northwest since 1978, and EarthCraft has been working with straw bale techniques for more than two decades.
The Bitterbrush Property at a Glance
Beyond the three-bedroom main structure, the Bitterbrush property includes a 1,200-square-foot workshop — a practical addition for homeowners interested in hobbies, a home business, or additional storage. Construction costs ran approximately $600 per square foot, putting the overall price tag above $2.5 million.
The home also features a solar hot water collection system. Sun-heated tubes warm water before it reaches an electric heater, reducing energy consumption and lowering utility overhead for the homeowner — a practical efficiency benefit that complements the natural materials used throughout the structure.
A Small but Growing Market in Idaho
Straw bale construction remains a rarity in Idaho. Fewer than half a dozen companies or individual artisans in the state currently work with the technique, making EarthCraft one of a very small group of builders offering this type of construction in the region.
Nationally, however, the market is expanding. The straw bale construction industry is currently valued at approximately $260 million and is projected to grow to nearly $462.7 million by 2033, reflecting broader interest in natural building materials and energy-efficient home design.
For Ada County homeowners and prospective buyers, a straw bale home represents a departure from conventional wood-frame or concrete construction — one that prioritizes durability, thermal performance, and locally sourced materials. The Treasure Valley’s agricultural heritage makes it a natural fit for this type of building, since much of the straw used in projects like Bitterbrush comes directly from area farms.
Boise’s broader community is also active in creative and volunteer-driven building efforts. Earlier this year, a group of Boise volunteers framed an entire home in just three hours during a Cathedral of the Rockies event, demonstrating the range of building approaches taking shape across the valley.
What Comes Next
Homeowners or builders curious about straw bale construction in the Boise area can research EarthCraft Construction Inc. directly for project inquiries. Given the limited number of straw bale builders in Idaho, early outreach is advisable for anyone considering this approach. Ada County residents interested in sustainable or alternative building methods may also want to consult with local planning and zoning offices regarding any applicable construction codes before breaking ground. For more community happenings around Boise this summer, check out upcoming local events including the return of the Dandelion Festival on June 20.