Jefferson County Seal
Jefferson County,
Est. 1818
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Codes and Ordinances

The Unified Development Order (UDO) was adopted on April 2, 2008 and has been amended from time to time.  The UDO is contained in Title IV. Land Use, Chapter 400. Unified Development Order and can be found here.  




 In December, 2015, the Jefferson County, Missouri, Council approved amendments to the Unified Development Order.  A complete copy of the amendments can be found here.