Codes and ordinances

1. Building and Construction Codes

   View St. Charles County's adopted International Building Codes with amendments.

2. Floodplain Development

   Learn more about the plan for floodplain management in the county.

3. Miscellaneous Ordinances

   These are additional regulations contained in the Ordinances of St. Charles County (OSCCMo), which the Community Development Department oversees.

4. Property Maintenance Code

   St. Charles County adopted and currently enforces the 2009 International Property Maintenance Code (IPMC) with amendments.

5. Unified Development Ordinance

   In 1999, St. Charles County adopted the Unified Development Ordinance (UDO), which developed from the land subdivision regulations that had been in place since 1959.

6. Stormwater Management & Watercourse Protection

   Learn more about St. Charles County's processes to handle storm water and keep our waterways safe.