Residential Structures Code Program

Adopted codes and standards

The division works with building officials, technical committees, advisory boards, and the public to adopt, amend, and interpret the Oregon Residential Specialty Code (ORSC). This code applies to the construction, reconstruction, and repair of one- and two-family dwellings and townhouses.

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)
  
• Adoption process for the 2023 ORSC
• Issued errata
  
• Emergency Escape and Rescue Opening - R310 amendments
• Attached stacked two-family dwelling - amendments
  

Code update training and adoption resources

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ORSC ADOPTION

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Wildfire Hazard Mitigation

Program activities

• Residential and Manufactured Structures Board - The Residential and Manufactured Structures Board works with the division to adopt and administer the ORSC.
• Residential code adoption - The division works with the board, local building officials and industry stakeholders to adopt each edition of the ORSC. The code adoption process includes a code development phase, a board review phase which can include a code review committee, a rulemaking phase and for certified inspectors, a code update training phase.
• Permit-ready plans - The division has developed new permit-ready deck plans meeting the requirements of the ORSC.
• Low-volume window labels - The Low-Volume Window Label Program helps manufacturers and installers comply with the Oregon Residential Specialty Code (ORSC) fenestration provisions for windows and glazed doors, as well as certain kinds of skylights and solariums, produced in small numbers.
  

Small Home Specialty Code

The Small Home Specialty Code, established by ORS 455, requires that the 2018 International Residential Code, including but not limited to Appendix Q, be used for the design and construction of small homes. Statute defines a "small home" as a single-family residence that is not more than 400 square feet in size.

For more information about small home construction standards see ORS 455, including 455.616.

For more information on building permit requirements, please contact your local building department .

Small home resources

• ORS 455, including 455.616
• 2018 International Residential Code online read-only version
  
• 2018 International Residential Code, Appendix Q
• Construction standards for small homes, HB 2423 (2019)