Johnson County primarily handles permits for unincorporated areas, focusing on septic systems and driveway access, while incorporated cities manage their own building, electrical, and plumbing permits. Development in unincorporated areas is subject to county subdivision regulations and floodplain management requirements.
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.