International Energy Conservation Code, residential
Missouri leaves the IECC residential to cities and counties
Missouri leaves the IECC residential to cities and counties. Adopted by Local governments; state energy standard for state buildings set by rule under RSMo 8.812. The legal citation is RSMo 67.280; RSMo 8.812.
Record of adoption
Edition in force
Local adoption
Partial
- Legal citation
- RSMo 67.280; RSMo 8.812
- Adopted by
- Local governments; state energy standard for state buildings set by rule under RSMo 8.812
- Second reading
- Applies
- Local option
DNR lists local codes by county and city on the State Data Portal and names no state edition. DOE’s ‘equivalent code’ 2015 IECC is not an adopted statewide edition.
Exceptions
- RSMo 8.812 requires a minimum energy standard for state buildings over 5,000 sq ft, at least as stringent as the 2006 IECC or the latest version; designs initiated on or after Jul 1, 2009
How Missouri adopts the IECC residential
For the public, cities and counties adopt energy codes by ordinance. For state buildings only, RSMo 8.812 names the 2006 IECC as a floor (‘or the latest version thereof’) and directs a standard set by rule; no general statewide residential energy code exists.
Cycle. irregular; set by each local jurisdiction
Laws, rulings, and other actions
- LegislationHB 9392025 regular session
Would repeal and replace RSMo 67.280 to limit county and municipal authority over green building ordinances.
Pending (referral recorded Mar 13, 2025, per a secondary tracker)
app.legiplex.com (opens in a new tab) - 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) - Executive orderExecutive Order 09-18 (Gov. Nixon), state building energy efficiency
Requires new state construction, leased buildings and significant renovations to meet at least the most recent IECC energy efficiency standards.
- LegislationRSMo 8.812, state building energy efficiency standard (L. 1993 HB 195; amended 2008 SB 1181)
Requires a minimum energy efficiency standard for state buildings over 5,000 sq ft at least as stringent as the 2006 IECC or the latest version, for designs initiated on or after Jul 1, 2009.
Enacted 2008, effective Aug 28, 2008
revisor.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
“at least as stringent as the International Energy Conservation Code 2006, or the latest version thereof”
RSMo 8.812Missouri Revisor of Statutesrevisor.mo.gov (opens in a new tab)StatuteRetrieved About an exception
State of Missouri Building Energy Efficiency Design StandardMissouri Office of Administrationoa.mo.gov (opens in a new tab)Agency pageRetrieved 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
State Profile: MissouriCross-checkUS Department of Energy, Building Energy Codes Programenergycodes.gov (opens in a new tab)Tracker, secondaryRetrieved
DOE’s energycodes.govCross-checkAgrees with the record
Current State Code: Home Rule; Equivalent Code: 2015 IECC; Enforcement: Jurisdictional
BCAP’s code status pageCross-checkAgrees with the record
No statewide energy code
Related pages
- See Missouri’s IECC residential on the map
- IECC residential adoption in every state
- All six codes in Missouri