Ellis County primarily handles permitting for unincorporated areas, while incorporated cities maintain exclusive jurisdiction over their own building permits and zoning. The county enforces floodplain management regulations for development within designated flood hazard areas in unincorporated territory.
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.