Building Codes by State & Jurisdiction

You can find current building codes for any US state by clicking on the interactive map above. Our tool provides a complete list of adopted codes (IBC, IRC, NEC, etc.), effective dates, and amendment types (As-Is, State Amended, or State Edition) for all 50 states and major jurisdictions.

Many states have adopted the 2021 IBC, including California (as the 2022 CBC), Washington, Oregon, and others. Adoption status changes frequently. Use the 'By Code' view in our tool to select 'International Building Code' and see a color-coded map of exactly which states use the 2021, 2018, or 2024 editions.

The International Building Code (IBC) is a model code published by the ICC. States typically adopt this model code in one of three ways: 'As Is' (no changes), 'State Amended' (IBC + specific local changes), or as a 'State Edition' (e.g., Florida Building Code), where the state rewrites the code entirely based on the IBC framework but with extensive local modifications.

All 50 states base their electrical standards on the National Electrical Code (NEC/NFPA 70). However, the edition year (2017, 2020, 2023) varies by state. Some states, like California, publish it as the 'California Electrical Code' (Title 24 Part 3), while others simply adopt the NEC with a list of amendments. Check your specific state on the map for details.

Home Rule status means that a state does not mandate a single statewide building code. Instead, local jurisdictions (cities and counties) have the legal authority to adopt their own codes. States like Texas, Colorado, and Arizona are Home Rule states, meaning code requirements can vary significantly from one city to the next within the same state.

Model codes like the IBC and IRC are updated every 3 years (2018, 2021, 2024). States typically adopt these new editions 1-3 years after publication. Our database tracks these effective dates, showing you exactly when a code became enforceable in your jurisdiction.

Most states mandate compliance with the IECC or a state-specific energy code (like California's Title 24 Part 6). Energy codes regulate insulation, window performance, lighting, and HVAC efficiency. Check your state's page on our tool to see which version of the IECC or state energy code is currently in effect.

While we provide adoption status and effective dates, the full text of state codes is often available for read-only viewing on state government websites or through the ICC's public access portal (often called 'ICC Digital Codes'). We recommend determining which code applies using our tool, then visiting the official publisher's site for the specific text.

Commercial projects typically fall under the International Building Code (IBC), while one- and two-family dwellings fall under the International Residential Code (IRC). Our tool tracks adoption for both. Select your state to see if they use the standard IBC/IRC or state-specific versions (like the commercial 'Building Code of New York State' vs. 'Residential Code of New York State').

Newer code editions often introduce stricter requirements for energy efficiency, structural resilience (seismic/wind), and fire safety, which can impact construction methods and material costs. Knowing exactly which code edition is enforced in your target state is critical for accurate preconstruction estimating and budgeting.