Oregon building code
Oregon has adopted 2025 OSSC based on 2024 IBC (plus 2024 IFC new-construction provisions and 2024 IEBC). The table below lists the governing edition for every discipline a plan check touches, followed by the Oregon cities and counties that amend it locally.
- Current edition
- 2025 Oregon specialty-code cycle: 2025 OSSC / OMSC / OFC / OEESC (based on 2024 I-Codes and ASHRAE 90.1-2022), alongside 2023 ORSC / OESC / OPSC
- Prior edition
- 2022 OSSC (based on 2021 IBC) and 2022 OMSC (2021 IMC/IFGC) were permitted during the six-month phase-in of the 2025 editions
- Code authority
- Oregon Building Codes Division, Department of Consumer and Business Services (fire: Oregon State Fire Marshal)
Edition changeover: Projects with a complete application on or before 2026-03-31 may still be reviewed under the 2022 OSSC (based on 2021 IBC) and 2022 OMSC (2021 IMC/IFGC) were permitted during the six-month phase-in of the 2025 editions.
Adopted code by discipline
| Discipline | Adopted code | Local amendment |
|---|---|---|
| Building | 2025 OSSC based on 2024 IBC (plus 2024 IFC new-construction provisions and 2024 IEBC) | n/a |
| Residential | 2023 ORSC based on 2021 IRC | n/a |
| Existing buildings | 2025 OSSC based on 2024 IEBC (incorporated into the 2025 OSSC) | n/a |
| Fire | 2025 OFC based on 2024 IFC | n/a |
| Electrical | 2023 OESC based on 2023 NEC (NFPA 70) | n/a |
| Mechanical | 2025 OMSC based on 2024 IMC and 2024 IFGC | n/a |
| Plumbing | 2023 OPSC based on 2021 Uniform Plumbing Code (UPC) | n/a |
| Energy | 2025 OEESC based on ASHRAE Standard 90.1-2022 (commercial) | n/a |
| Fuel Gas | 2025 OMSC based on 2024 IFGC (incorporated into the OMSC) | n/a |
Overlays that can apply
Mapped hazard and district overlays stack on top of the adopted code. These are the overlays recorded for Oregon. They apply by parcel, not jurisdiction-wide, so confirm the parcel before assuming one is in play. Check CAL FIRE's fire hazard severity viewer and FEMA's flood map service.
- Seismic design category overlay
- Wildland-urban interface area
- FEMA mapped flood hazard area
Sources
- https://www.oregon.gov/bcd/codes-stand/pages/adopted-codes.aspx
- https://www.oregon.gov/bcd/codes-stand/pages/ossc-adoption.aspx
- https://www.oregon.gov/bcd/codes-stand/Pages/mechanical.aspx
- https://www.oregon.gov/bcd/codes-stand/pages/residential-structures.aspx
- https://www.oregon.gov/osfm/fire-service-partners/pages/oregon-fire-code.aspx
- https://codes.iccsafe.org/content/ORSSC2025P1
- https://codes.iccsafe.org/content/ORRC2023P1
- https://codes.iccsafe.org/content/ORMSC2025P1
- https://www.oregon.gov/osfm/safety/Documents/2025OFC_Executive_Summary.pdf
- https://www.oregonlegislature.gov/bills_laws/ors/ors455.html
Common questions
What building code does Oregon use?
Oregon uses 2025 OSSC based on 2024 IBC (plus 2024 IFC new-construction provisions and 2024 IEBC). It is administered by the Oregon Building Codes Division, Department of Consumer and Business Services (fire: Oregon State Fire Marshal). The prior edition was 2022 OSSC (based on 2021 IBC) and 2022 OMSC (2021 IMC/IFGC) were permitted during the six-month phase-in of the 2025 editions.
Do cities in Oregon amend the state code?
Local amendments are adopted by ordinance at the city or county level. Confirm with the building department that reviews your permit.
Which edition applies to a permit already in review in Oregon?
Projects with a complete application on or before 2026-03-31 may still be reviewed under the 2022 OSSC (based on 2021 IBC) and 2022 OMSC (2021 IMC/IFGC) were permitted during the six-month phase-in of the 2025 editions.
Check a plan set against Oregon code
Knowing the adopted edition is the easy half. Architechtura reads your drawings, resolves which of these provisions actually apply to the project, and returns the corrections a plan checker would write up, each one cited to the section it came from.
Your first check is free, no card required.
Compiled from published state and municipal adoption ordinances. Local governments amend their codes on their own schedule, and a pending ordinance can change what applies to your permit. Confirm the governing edition with the building department before you submit. This page is reference information, not a code determination.