What matters for project planning
Exterior work on a below-grade wall is exactly what this guidance is written for: grading, trenching and a new discharge route are the activities the MS4 program governs, and the city directs owners to confirm FEMA flood-zone status through the state before major exterior or foundation work begins. There is a jurisdictional wrinkle worth settling early, since an address outside city limits falls under the county's separate MS4 program rather than the Engineering Department's -- different office, different submission, same underlying question about where the water is permitted to go.
Official sources
- South Bend MS4 stormwater program
- South Bend wetlands and floodplain guidance
- St. Joseph County MS4 program
Zoom in before you assume anything
None of this tells you a specific South Bend parcel's flood zone, historic status, permit requirements, or hidden conditions. Confirm those directly with the city and the provider you choose.
Reviewed 2026-07-26; since maps and requirements can shift, confirm current status before relying on this.