Montana: International Energy Conservation Code (commercial), lead only

Tracker reading

How it was checked

Lead only

A tracker lists this edition. Nobody has checked it against the state’s own record yet.

What the trackers say

Code adoption trackers are a cross-check. They are not Montana’s own record.

• DOE’s energycodes.govCross-check

  2021 IECC, effective Sep 21, 2024

  Current State Code: 2021 IECC and ASHRAE 90.1-2019; State Amendments: Yes; Equivalent Code: 90.1-2019; Effective Date: 09/21/2024; Enforcement: Mandatory Statewide

  energycodes.gov (opens in a new tab)Read Oct 17, 2026

Related pages

• See Montana’s IECC commercial on the map
• IECC commercial adoption in every state
• All six codes in Montana

Other codes in Montana

• NEC2020 NECLead only
• IBC2021 IBCLead only
• IRC2021 IRCLead only
• IFC2021 IFCLead only
• IECC residential2021 IECCLead only