The LEED reference guide gives a quick summary of STC requirements (shown here), but it’s worth referring to the ANSI standard, which gives you more information on determining the required STC ratings and provides design guidance on how to meet these requ

The LEED reference guide gives a

quick summary of STC requirements (shown here), but it’s worth referring to the ANSI standard, which gives you more information on determining the required STC ratings and provides design guidance on how to meet these requirements for each space type, most notably composite assemblies (such as wall with windows and doors). Note that the STC rating for adjacency to exterior spaces provided in the table is the typical minimum requirement and the appropriate STC rating will need further research on a case-by-case basis.