Randall County primarily manages development in unincorporated areas, while the cities of Amarillo and Canyon maintain exclusive jurisdiction over building permits within their respective city limits. Unincorporated areas are subject to county-level floodplain management and onsite sewage facility (OSSF) permitting. Development in the Palo Duro Canyon area may be subject to specific environmental and fire safety reviews.
How this fits with the state
The state authority here is Texas Department of Licensing and Regulation; Texas State Board of Plumbing Examiners. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.