Mezzanine permits, state by state.

No general statewide commercial code — adopted at city/county level (state code applies only to state buildings, schools, hotels, theaters)

Alaska Building Code 2021, based on 2021 IBC with Alaska amendments (13 AAC 50)

No statewide commercial code — adopted at city/county level

2021 Arkansas Fire Prevention Code Vol. II (the 2021 IBC as adopted by the State Fire Marshal)

2025 California Building Code (Title 24, Part 2), based on 2024 IBC — in force since Jan 1, 2026

No statewide commercial code for private buildings — adopted at city/county level (home rule)

2022 Connecticut State Building Code, based on 2021 IBC

No single statewide commercial code — county/municipal adoption (New Castle & Sussex: 2021 IBC; Kent: 2018 IBC)

2017 DC Construction Codes — DC Building Code based on 2015 IBC with DC amendments

2023 Florida Building Code, 8th Edition, based on 2021 IBC

2024 IBC with Georgia amendments (State Minimum Standard Building Code) — in force since Jan 1, 2026

Hawaii State Building Code based on 2018 IBC with Hawaii amendments (2021 editions phasing in)

2018 IBC with Idaho amendments (Idaho Building Code)

No statewide commercial building code — adopted at city/county level

2014 Indiana Building Code, based on 2012 IBC — still current

2024 IBC as adopted in the Iowa State Building Code

No statewide commercial building code — adopted at city/county level

2018 Kentucky Building Code, 4th Edition, based on 2018 IBC

Louisiana State Uniform Construction Code incorporating 2021 IBC

MUBEC (Maine Uniform Building and Energy Code) — 2021 IBC, in force since Apr 2025

Maryland Building Performance Standards — 2021 IBC as modified by COMAR 09.12.51

780 CMR State Building Code, 10th Edition, based on 2021 IBC — sole code since Jul 2025

2021 Michigan Building Code, based on 2021 IBC — in force since Apr 2025

2020 Minnesota State Building Code, based on 2018 IBC

No statewide commercial building code — locals may adopt any of the three latest IBC editions

No statewide commercial building code — adopted at city/county level

2021 IBC (state-adopted, applies statewide)

Nebraska State Building Code — 2018 IBC (adopted by statute)

No single statewide commercial code — adopted at city/county level

NH State Building Code — 2021 IBC (2024-code update effective Jul 1, 2026)

NJ Uniform Construction Code — building subcode is 2021 IBC with NJ amendments

2021 New Mexico Commercial Building Code, based on 2021 IBC

2025 Uniform Code — 2025 Building Code of New York State, based on 2024 IBC (in force since Dec 31, 2025)

2018 NC State Building Code, based on 2015 IBC

ND State Building Code — based on 2021 IBC

2024 Ohio Building Code, based on 2021 IBC with Ohio amendments

2018 IBC (statewide minimum, adopted without modification)

2025 Oregon Structural Specialty Code, based on 2024 IBC (mandatory from Apr 1, 2026)

PA Uniform Construction Code — 2018 IBC as amended

RI State Building Code (RISBC-1), based on 2021 IBC

2021 SC Building Codes — 2021 IBC (state-adopted)

No mandatory statewide commercial code — local adoption (adopting jurisdictions must comply with 2021 IBC)

2021 IBC with amendments (State Fire Marshal-adopted, in force since Apr 2025)

No statewide commercial building code — adopted at municipal level (home rule)

2021 IBC (state-adopted statewide via the Utah State Construction Code)

Vermont Fire & Building Safety Code, 2025 edition, incorporating 2021 IBC

2021 Virginia Construction Code (Uniform Statewide Building Code), based on 2021 IBC

Washington State Building Code — 2021 IBC with Washington amendments

WV State Building Code — 2018 IBC base; applies only where local governments adopt it

Wisconsin Commercial Building Code — 2021 IBC with Wisconsin amendments (since Sept 2025)

2021 IBC (state standard); local jurisdictions may assume enforcement with equal or stricter codes