Model Code Adoption by Jurisdiction
Choose a model code (IBC, IFC, etc.) to see which jurisdictions have adopted it – and whether it's adopted as-is or amended.
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Our catalog includes the most widely adopted US building codes, including the International Building Code (IBC), International Residential Code (IRC), National Electrical Code (NEC/NFPA 70), and many specialty codes like the IECC, IFC, and plumbing/mechanical codes from ICC, NFPA, and IAPMO.
Simply click on any codebook in the list above (e.g., 'International Building Code'). You will be taken to a detailed map and data view showing exactly which states have adopted that specific code, which edition (year) they use, and any relevant state amendments or effective dates.
The US building regulatory system relies on model codes from three main organizations: the International Code Council (ICC) for 'I-Codes' (Building, Residential, Fire, etc.), the National Fire Protection Association (NFPA) for Electrical and Fire codes, and IAPMO for Uniform Plumbing and Mechanical codes.
The International Building Code (IBC) applies to all types of buildings and structures (commercial, multi-family, institutional), while the International Residential Code (IRC) specifically applies to detached one- and two-family dwellings and townhouses up to three stories. Use the catalog above to see adoption maps for both.
You can view the adoption status, effective dates, and amendment types for free using this tool. To view the actual text of the codes, you typically need to purchase the code books from the publisher, although some states provide free online read-only access to their specific state amendments.