1 county-level rule, plus city-specific rules for 2 cities in St. Louis County, Missouri.
Verified from official government sources
St. Louis County participates in the FEMA National Flood Insurance Program (NFIP) and enforces floodplain management standards through Title X, Chapter 1008 SLCRO 1974. Residential structures (new or substantially improved) within Special Flood Hazard Areas must have the lowest floor (including basement) elevated to at least 1 foot above the Base Flood Elevation (BFE) - a 1-foot freeboard standard. Non-residential structures must be similarly elevated or floodproofed to 1 foot above BFE. The county lies at the confluence of the Mississippi and Missouri Rivers and was severely impacted by the 1993 Great Flood (Mississippi crested at 49.58 ft in St. Louis on August 1, 1993, the highest stage ever recorded). A floodplain development permit is required for any development in mapped flood zones.
2 cities in St. Louis County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
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St. Louis County Ordinance Hub →