Oregon Building Code Change Deadline: What Happens April 1, 2026?
Every three years, Oregon updates its statewide building codes as part of the regular adoption cycle administered by the Oregon Building Codes Division.
The most recent update includes the 2025 Oregon Structural Specialty Code (OSSC) along with several related specialty codes used for commercial and complex building projects.
Although the new codes technically became effective October 1, 2025, Oregon allows a six-month phase-in period where projects may be submitted under either the previous or newly adopted codes.
That transition period is now coming to an end.
Beginning April 1, 2026, all new permit applications must comply with the 2025 OSSC and associated updated specialty codes.
For developers, property owners, and design professionals, this deadline can affect projects currently moving through design and permitting.
Understanding Oregon’s Three-Year Code Cycle
Oregon updates its building codes on a three-year cycle, generally following updates to the International Building Code and other model codes.
The 2025 Oregon Structural Specialty Code is based largely on:
the 2024 International Building Code
portions of the International Fire Code
the International Existing Building Code
along with Oregon-specific amendments and administrative provisions.
These statewide codes regulate many aspects of building design and construction, including:
structural safety
fire and life safety systems
accessibility requirements
energy performance
mechanical and building systems
The Current Phase-In Period
When new codes are adopted, Oregon provides a transition window so projects already in development are not immediately forced to change code editions.
For the current code cycle:
DateEventOctober 1, 20252025 OSSC becomes effectiveOctober 1, 2025 – March 31, 2026Phase-in periodApril 1, 20262025 codes become mandatory
During the phase-in period, permit applications may be submitted under either the 2022 OSSC or the 2025 OSSC.
Once the transition period ends, all new permit applications must comply with the 2025 code edition.
Important Note for Residential Projects
While the upcoming deadline affects many commercial and complex projects, it does not apply to the Oregon Residential Specialty Code (ORSC).
The ORSC governs most detached single-family homes, duplexes, and townhouses, and it follows a slightly different adoption timeline than the OSSC.
The current 2023 Oregon Residential Specialty Code remains in effect for residential construction.
The next update to the residential code is anticipated to occur in the 2026 code cycle, with implementation expected in 2026 or early 2027 following the standard rulemaking and phase-in process administered by the Oregon Building Codes Division.
Because of this staggered schedule, most typical residential remodels and new homes will not be affected by the April 1, 2026 OSSC transition deadline.
Why the Code Deadline Matters
The code edition used for a project is typically determined by the code in effect when the permit application is submitted.
For projects currently nearing submission, this creates an important decision point:
Submit under the 2022 code before the deadline, or
Continue design under the 2025 code requirements
In some cases, the new code may introduce additional requirements that affect building design, documentation, or construction cost.
For projects already designed under the previous code edition, submitting prior to the deadline may avoid the need for revisions.
Potential Impacts of the New Code Edition
While many provisions remain consistent between code cycles, updates can affect several technical areas.
These may include:
structural design provisions
fire and life safety requirements
accessibility standards
mechanical and building system coordination
energy efficiency requirements
Even relatively small changes can require updates to design documentation or engineering coordination during permitting.
Planning Ahead During Code Transitions
For projects still in early design phases, transitioning to the new code requirements may have minimal impact.
However, projects that are nearing permit submission should evaluate their strategy carefully.
Property owners and development teams may want to consider:
whether the project is close to permit submission
whether design changes would be required under the new code
whether submitting before the deadline would provide advantages
Early coordination with the design team can help avoid last-minute delays.
Architectural Guidance During Code Updates
Building code transitions are a normal part of the construction industry, but they can introduce complexity for projects in development.
Architects help clients navigate these changes by:
evaluating applicable code requirements early in the design process
coordinating structural and engineering consultants
preparing permit documentation aligned with the correct code edition
advising clients on submission strategies during transition periods
This proactive approach helps reduce the risk of redesign, permitting delays, or unexpected project impacts.
About JR DBA
JR DBA provides architecture, building code consulting, and owner representation services for residential and commercial projects in the Portland region.
These services help property owners navigate zoning regulations, building code requirements, and permitting processes while protecting the long-term value of their investment.
