Permits for unincorporated areas are handled by the County Planning and Building Department. Incorporated cities within the county, such as San Luis Obispo, Atascadero, and Paso Robles, manage their own building and planning permits. Review for coastal development, hillside areas, and fire hazard zones may add complexity.
The county has specific regulations for development in coastal zones, hillside areas, and areas prone to wildfire, often requiring additional environmental and safety reviews.
How this fits with the state
The state authority here is California Contractors State License Board. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.
Source · City-by-city; San Luis Obispo County departments handle unincorporated areas, while incorporated cities manage their own building permits.Last verified · 05 / 2026