St. Joseph County handles permits for unincorporated areas, while incorporated cities like South Bend and Mishawaka maintain their own building departments and zoning authorities. Projects in unincorporated areas must comply with county-specific zoning ordinances and may be subject to additional review if located within designated flood hazard areas.
How this fits with the state
The state authority here is Indiana Professional Licensing Agency; local building departments. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.