International Building Code
Missouri leaves the IBC to cities and counties
Missouri leaves the IBC to cities and counties. Adopted by Local governments; Missouri Board for Architects, Professional Engineers, Professional Land Surveyors and Professional Landscape Architects (for 20 CSR 2030-2.040). The legal citation is RSMo 67.280; 20 CSR 2030-2.040.
Record of adoption
Edition in force
Local adoption
Partial
- Legal citation
- RSMo 67.280; 20 CSR 2030-2.040
- Adopted by
- Local governments; Missouri Board for Architects, Professional Engineers, Professional Land Surveyors and Professional Landscape Architects (for 20 CSR 2030-2.040)
- Second reading
- Applies
- Local option
20 CSR 2030-2.040 (amended eff. Jul 30, 2020) names the 2018 IBC for evaluating professional conduct ‘in the absence of any local building code’; it is not a code enforced on buildings. ICC’s page also cites a 2009 IBC under the Architecture Practice Act, which the current rule supersedes.
Exceptions
- State-owned building projects follow Office of Administration design guidelines (IBC listed, latest edition, no year named)
How Missouri adopts the IBC
Cities and counties adopt IBC editions by ordinance under RSMo 67.280. The licensing board’s rule refers to the 2018 IBC and says it does not incorporate later amendments, so a later edition would need a new rule.
Cycle. irregular; set by each local jurisdiction
Laws, rulings, and other actions
- LegislationSB 743, Missouri Building Codes Act2025 regular session, Sen. Brown
Would create state building, electrical, energy, fire and other codes from ICC and other model codes, require existing local codes to conform, and require commission approval of local amendments.
Pending (introduced Feb 24, 2025, per a secondary tracker)
senate.mo.gov (opens in a new tab) - UndatedLegislationSB 1431, Missouri Building Codes2026 regular session, Sen. Henderson
Would establish Missouri Building Codes based on ICC and other model codes, with commission approval of local amendments and implementation by Aug 28, 2028.
Pending (introduced)
senate.mo.gov (opens in a new tab) - UndatedLegislationHB 3466, Missouri Building Codes Act2026 regular session, Rep. Hruza
Would require jurisdictions with an existing building code to adopt the state codes by rule, allow local amendments, and let local bodies adopt by reference.
Pending (introduced)
documents.house.mo.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.
Read twice: a second, blind reading of the state’s record agreed with the first on .
The state’s record was last read on , from five source pages.
Evidence 4 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.
Codes by jurisdictionMissouri Department of Natural Resourcesdnr.mo.gov (opens in a new tab)Agency pageRetrieved About an exception
“the latest edition of codes and standards”
Design Guidelines (revisions through 06/17)Missouri Office of Administration, Facilities Managementoa.mo.gov (opens in a new tab)Agency pageRetrieved About the note
“Filed Dec. 27, 2019, effective July 30, 2020.”
20 CSR 2030-2.040 (Code of State Regulations, Division 2030 chapter 2)Missouri Secretary of Statesos.mo.gov (opens in a new tab)Administrative codeRetrieved About how the state adopts codes
RSMo 67.280 Communities may incorporate by reference certain technical codesMissouri Revisor of Statutesrevisor.mo.gov (opens in a new tab)StatuteRetrieved
Tracker cross-checks
Code adoption trackers are a cross-check. They are not Missouri’s own record.
About a tracker cross-check
Missouri adoptions map pageCross-checkInternational Code Counciliccsafe.org (opens in a new tab)Tracker, secondaryRetrieved
ICC’s code adoption mapCross-checkAgrees with the record
State page: ‘most relevant building codes are adopted locally, the state adopts codes for state owned buildings’; Architecture Practice Act cites 2009 IBC; ‘default standard is the 2018 IBC’. Master adoption chart row for Missouri shows X marks (some state or local agency, not all buildings).
ICC’s code adoption mapCross-checkDoes not agree with the record
2009 IBC under the Architecture Practice Act
AWCCross-checkAgrees with the record
Lists 2018 IBC as adopted with applicability ‘LIMITED’; most adoption is local