Most of Monterey County's population resides within incorporated cities, which manage their own building permits and zoning. The County Planning and Building Department handles unincorporated areas. Coastal development is subject to review by the California Coastal Commission, and specific areas may have additional wildfire or flood zone 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.