International Building Code
Ohio enforces the 2021 IBC
The 2021 International Building Code (IBC) has been in force in Ohio since Mar 1, 2024. It applies statewide. Adopted by Ohio Board of Building Standards. The legal citation is OAC Chapters 4101:1-1 through 4101:1-35; ORC 3781.10.
Record of adoption
Edition in force
2021 IBC
2024 Ohio Building Code
Partial
- In force since
- Legal citation
- OAC Chapters 4101:1-1 through 4101:1-35; ORC 3781.10
- Adopted by
- Ohio Board of Building Standards
- Applies
- Statewide
- State amendments
- Major
- Also called
- OBC, OAC 4101:1
Original 2024 OBC effective Mar 1, 2024; rules 4101:1-1-01, 1-13-01 and 1-35-01 were refiled with later effective date Oct 15, 2025 (amendments), still on the 2021 IBC.
Coming next
- Change to the 2021 IBCPartialNo date yetProposedOAC Chapter 4101:1
BBS page updated Sep 23, 2026, says it proposes amendments to the 2024 Ohio codes; written comments due Sep 30, 2026; hearing date ‘Coming Soon’. No new IBC edition (2024) is named.
How Ohio adopts the IBC
The Board of Building Standards formulates and adopts the Ohio Building Code by rule under ORC 3781.10, incorporating an ICC edition by reference with Ohio amendments. The agency holds a public hearing and files with JCARR (ORC 119.03); JCARR can recommend invalidating a proposed rule by concurrent resolution (ORC 106.021). A rule cannot take effect earlier than the tenth day after final filing.
Cycle. Irregular, roughly every 3-6 years (2017 base edition 2015, 2024 base edition 2021), plus five-year rule reviews.
Laws, rulings, and other actions
- UndatedLegislationHB 361 (136th General Assembly)
Regards building inspections, local regulations and zoning; amends ORC 3781.10 and 3781.181; in House Local Government Committee.
Pending
ohiohouse.gov (opens in a new tab)
How it was checked
Partial
Researched in the state’s own record. The seal stays broken until the passage is on file word for word.
The state’s record was last read on , from three source pages.
Evidence 3 sources
Sources for the record itself come first, the state’s own records ahead of others. A label marks a source about something else, such as an exception. A source marked secondary is not the state’s own record.
“the International Building Code 2021 edition”
OAC 4101:1-1-01 Administration (Ohio Building Code), effective 10/15/2025Ohio Legislative Service Commission, codes.ohio.govcodes.ohio.gov (opens in a new tab)Administrative codeRetrieved “October 15, 2025”
“11/1/2017, 8/1/2018, 3/1/2024”
Rule 4101:1-1-01 AdministrationOhio Legislative Service Commission, codes.ohio.govcodes.ohio.gov (opens in a new tab)Administrative codeRetrieved Ohio Board of Building Standards has issued a new BBS Memo #414ICC NTA (third-party summary of BBS memo)icc-nta.org (opens in a new tab)Other source, secondaryRetrieved
Tracker cross-checks
Code adoption trackers are a cross-check. They are not Ohio’s own record.
ICC’s code adoption mapCross-checkAgrees with the record
Adoption chart (April 2026, mitek-us.com copy): Ohio first entry 21; ICC OH page: 2024 Ohio Building Code adopts the 2021 editions, effective Mar 1, 2024