Oregon writes its own code for the IECC residential

Record of adoption

In force since

Oct 1, 2026

Legal citation

OAR 918-480-0005; additional energy provisions under OAR 918-460-0500 per OAR 918-480-0005(2)(b)

Adopted by

Oregon Department of Consumer and Business Services, Building Codes Division (Residential and Manufactured Structures Board approves)

Second reading

Agreed Oct 18, 2026

Applies

The state writes its own code

Also called

ORSC Chapter 11, Oregon residential energy provisions

Residential energy provisions sit in ORSC Chapter 11, whose committee drafts mark Oregon-added language. The ORSC rule text that was checked does not mention the IECC, so this is treated as the state’s own code. The 2026 Chapter 11 is effective Oct 1, 2026, and mandatory Apr 1, 2027 (2023 ORSC permitted through Mar 31, 2027). The board approved it Feb 18, 2026. An optional Residential Reach Code is separate.

How Oregon adopts the IECC residential

• Agency rule

Chapter 11 is updated inside the ORSC rulemaking (OAR 918-480-0005): the board’s residential energy code review committee drafts it, the Residential and Manufactured Structures Board approves it (Feb 18, 2026, for the 2026 edition) and forwards it to the administrator for rulemaking. Executive Order 20-04 directs BCD to set 2030 efficiency goals and to update the optional Reach Code when ORSC Chapter 11 and OSSC Chapter 13 are updated. No legislative approval step was found.

Cycle. Follows the ORSC cycle (editions effective Oct 1, 2023, and Oct 1, 2026), not the IECC cycle.

Laws, rulings, and other actions

1. Apr 1, 2027Other action
   2026 Oregon Residential Reach Code (optional, planned)

   Optional residential energy standard separate from the state code, with an anticipated effective date of Apr 1, 2027 (date shown is the anticipated effective date, not yet adopted).

2. Feb 18, 2026Other action
   Residential and Manufactured Structures Board approval of 2026 ORSC Chapter 11 energy provisions

   Board approved the energy provisions and forwarded them for rulemaking; the package includes a proposal to require heat pumps as the primary HVAC system in new homes with air conditioning.

3. Mar 10, 2020Executive order
   Executive Order 20-04 (greenhouse gas reduction; building energy efficiency goals)

   Directs BCD to adopt 2030 building energy-efficiency goals for new residential and commercial construction and to update the optional Reach Code on the same timeline; BCD’s Directive 6(B) report was published Sep 15, 2026.

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 Oct 18, 2026.

The state’s record was last read on Oct 18, 2026, from six source pages.

Evidence 6 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.

• “Additional energy provisions are adopted pursuant to OAR chapter 918, division 460, section 500.”

• “Commercial energy provisions are located in the Oregon Energy Efficiency Specialty Code (OEESC).”

  “Residential energy provisions are located in Chapter 11 of the Oregon Residential Specialty Code (ORSC).”

• “2026 Oregon Residential Specialty Code (ORSC) New adoption”

  “Chapters 2 - 44 and appendices ~ Effective Oct. 1, 2026 and mandatory April 1, 2027”

• About the note

  “Mandatory April 1, 2027”

  “During the phase-in period, except for Chapter 1, use of the 2023 ORSC or the 2026 ORSC is permitted”

• About how the state adopts codes

Tracker cross-checks

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

• DOE’s energycodes.govCross-checkDoes not agree with the record

  Residential: 2023 Oregon Residential Specialty Code, effective 04/01/2024, mandatory statewide, equivalent code 2018 IECC

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

Related pages

• See Oregon’s IECC residential on the map
• IECC residential adoption in every state
• All six codes in Oregon

Other codes in Oregon

• NEC2026 NECVerified
• IBC2024 IBCVerified
• IRC2024 IRCVerified
• IFC2024 IFCVerified
• IECC commercialAnother model codeVerified