Code Books/Codes in Effect

2021 ORSC

2023 Oregon Residential Specialty Code (ORSC) 

  • Administrative provisions (Chapter 1): 
    • Effective and mandatory Oct. 1,  2023
  • Construction provisions (Chapters 2 - 44 and appendices):
    • Effective Oct. 1, 2023 with *six-month phase-in period
    • Mandatory April 1, 2024
  • Based on 2021 International Residential Code (IRC)
  • Summary of amendments and changes
2022 OSSC

2022 Oregon Structural Specialty Code (OSSC)

Effective: October 1, 2022 with a 6-month phase-in period    Mandatory April 1, 2023

The 2021 OSSC is based on the 2021 International Building Code (IBC) and International Existing Building Code (IEBC).

2023 Electrical Code

2023 Oregon Electrical Specialty Code (OESC)

Effective and mandatory: Oct. 1, 2023
Based on the 2023 National Electrical Code (NEC)
Table of amendments to the 2023 NEC - Table 1-E

2021 OPSC

2023 Oregon Plumbing Specialty Code (OPSC)

  • Effective Oct. 1, 2023
  • Based on the 2021 OPSC and 2021 Uniform Plumbing Code (UPC)

The 2021 Oregon Plumbing Specialty Code is based on the 2021 edition of the Uniform Plumbing Code published by the International Association of Plumbing and Mechanical Officials, with Oregon specific amendments.

2022 Mechanical Code

2022 Oregon Mechanical Specialty Code (OMSC)
Effective:  10-1-2022

The 2021 International Mechanical Code (IMC) and International Fuel Gas Code (IFGC).

2010 MDISC

2010 Oregon Manufactured Dwelling Installation Specialty Code (MDISC)
Effective: April 1, 2010
The requirements found in the 2010 MDISC for the installation of manufactured dwellings replace the requirements previously found in the 2002 MD&P. The requirements in the 2002 MD&P will remain in effect for manufactured dwelling park construction.

2002 MH Parks

2005 Oregon Manufactured Dwelling and Park Specialty Code (MD&P)
Effective: April 1, 2002
The requirements for manufactured dwelling Park construction can still be found in the MD&P. However, installation requirements for manufactured dwellings are now contained in the new 2010 Oregon Manufactured Dwelling Installation Specialty Code (MDISC).