Miami-Dade County is highly fragmented with 34 incorporated municipalities that manage their own building and zoning permits. The county government retains jurisdiction over unincorporated areas and provides specialized review for certain infrastructure. All projects are subject to strict High Velocity Hurricane Zone (HVHZ) requirements and extensive flood zone regulations due to the county's low-lying coastal geography.
How this fits with the state
The state authority here is Florida DBPR - Construction Industry Licensing Board. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.