Oregon

For Oregon, energy code in force is Chapter 11 - Energy Efficiency; iecc edition basis is 2021 International Residential Code (IRC); effective date is Oct. 1, 2023; adopting authority is Oregon Building Codes Division; statute / rule citation is 2023 Oregon Residential Specialty Code (ORSC), verified against its source on 2026-09-29.

What the source says

Statewide alternate methods Statewide code interpretations Appeals Oregon design criteria hub Code adoption and review Adopted residential energy code 2023 Oregon Residential Specialty Code (ORSC) Chapter 11 - Energy Efficiency The provisions of Chapter 11 of the ORSC regulate the building thermal envelope, as well as the design, construction and selection of heating, ventilating and air-conditioning systems, piping insulation, lighting and power required for the purpose of effective conservation of energy within a building or structure governed by this code. Effective: Oct. 1, 2023 with 6 month phase-in period Mandatory: April 1, 2024 Based model code: 2021 International Residential Code (IRC)

— oregon.gov, retrieved 2026-08-18

Source

• oregon.govhttps://www.oregon.gov/bcd/codes-stand/Pages/energy-residential-compliance.aspx

Last verified against source: 2026-09-29. Due for re-check by 2027-02-14. This page as Markdown · OKF bundle · full dataset as JSON.