Philadelphia is a consolidated city-county, meaning the municipal government handles all building permits, zoning, and inspections for the entire jurisdiction. There are no independent municipal permit authorities within the county borders. All development must comply with the Philadelphia Zoning Code and the city's specific building construction standards.
How this fits with the state
The state authority here is Pennsylvania Office of Attorney General; local building departments. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.