Codes and Standards

The International Code Council’s (ICC) website details “State Adoptions” and “Local Adoptions” of the varied ICC codes (e.g., IBC, IECC, IMC, IPC, IRC, etc.) across the U.S. ICC’s “State Adoption” link provides information as to when the codes where adopted as well as to the key code contacts within a State. ICC’s “Local Adoption” link details county-by-county breakdowns of which version of the varied ICC codes are utilized in a given county by State. Learn more here.

A number of substantive changes have been made during ICC’s last code change cycle, which culminated in the publication of the 2021 editions. Below is a summary of those changes.  More summaries will be added as ICC publishes their new editions.

Summary of Significant Changes in the 2021 Edition of the International Mechanical Code