Montgomery County is highly urbanized with most incorporated cities managing their own building permits and zoning enforcement. The county building department primarily serves unincorporated townships and smaller jurisdictions that have not established their own departments. Development in flood-prone areas near the Great Miami River requires additional review for floodplain management compliance.
The Miami Conservancy District maintains specific jurisdiction over construction activities within the Great Miami River watershed to ensure flood protection integrity.
How this fits with the state
The state authority here is Ohio Construction Industry Licensing Board; local building departments. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.
Source · City-by-city; Dayton, Kettering, and other municipalities operate independent building departments and permit portals.Last verified · 05 / 2026