San Esteban del Rey Mission at Acoma, NM.
Question

What states allow adobe houses?

Adobe construction is broadly legal across the United States. Permitting states include New Mexico, Arizona, Texas, Colorado, Nevada, Utah, and Florida, provided the build meets local seismic, structural, and energy-code requirements. The notable exception is California. California effectively banned new unreinforced adobe construction for decades after twentieth-century seismic-code revisions. Dwell reported in 2025 that California is now relaxing the prohibition after the January 2025 Los Angeles fires drove demand for fire-resistant materials. Where allowed, modern codes typically require reinforced concrete bond beams, steel rebar, and engineered footings. New Mexico has the most established permitting path; Texas and Arizona issue adobe permits routinely under standard residential codes.