4 county-level rules, plus city-specific rules for 4 cities in Franklin County, Ohio.
Verified from official government sources
Franklin County operates MS4 stormwater program under Ohio EPA NPDES permit. Franklin County Engineer and Franklin Soil and Water Conservation District enforce stormwater rules. Projects disturbing 1+ acre require SWP3 and construction permit.
Franklin County requires erosion and sediment control per Ohio EPA Rainwater and Land Development Manual. Projects over 1 acre need SWP3 with silt fence, inlet protection, and stabilized entrances. Franklin SWCD reviews all construction plans.
Franklin County flood hazards concentrated along Scioto River, Olentangy River, Big Walnut Creek, and Alum Creek. FEMA FIRM panels updated 2019. Floodplain development requires permit through Franklin County Engineer or municipal floodplain administrator. NFIP participation mandatory.
FEMA Flood Map Service Center
FEMA Flood Map Service Center: Welcome! Looking for a Flood Map? Enter an address, a place, or longitude/latitude coordinates: Looking for more than just a current flood map? Visit Search All Products to access the full range of flood risk products for your community. About Flood Map Service Center The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard informatio...
Franklin County grading permits required for earth moving over 100 cubic yards or any work changing drainage patterns. Franklin County Engineer issues grading permits for unincorporated areas. Columbus requires grading permit for any excavation over 50 cubic yards.
4 cities in Franklin County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
See every category we cover for Franklin County — parking, noise, fences, fires, animals, pools, and more.
Franklin County Ordinance Hub →