Oregon Building Code Changes Take Effect April 1, 2026 — What Property Owners Need to Know
The April 1, 2026 deadline has now passed. If you submitted your permit application before that date, your project is likely still governed by the 2022 OSSC. If you are submitting now, the 2025 Oregon Structural Specialty Code is mandatory — no exceptions.
This article breaks down exactly what changed, who it affects, and what to do if your project is currently in permitting.
Quick Summary
The 2025 OSSC became mandatory on April 1, 2026
Applies to commercial and complex projects — not most residential builds
Permits submitted before April 1 can still use the 2022 code
Projects designed under the old code may require revisions if submitting now
The Oregon Residential Specialty Code (ORSC) is on a separate timeline
How Long Does It Take to Get a Building Permit in Portland? →
Do I Need to Hire an Architect for a Home Remodel in Oregon? →
If you are planning a commercial project, renovation, or complex build in Oregon, the code your permit is reviewed under has changed. As of April 1, 2026, the 2025 Oregon Structural Specialty Code (OSSC) is the only code accepted for new permit applications.
This matters because the code edition in effect when you submit your application governs your entire project. Switching code editions mid-design can mean costly revisions to documentation, structural drawings, and engineering coordination.
Every three years, Oregon updates its statewide building codes through the Oregon Building Codes Division. The most recent update includes the 2025 OSSC along with several related specialty codes used for commercial and complex building projects.
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, and 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 Phase-In Period (Now Closed)
When new building codes are adopted, Oregon typically provides a transition period so projects already in development are not immediately forced to redesign under a new code edition.
It is important to note that once a permit application is submitted and accepted under a specific code edition, the project generally remains subject to that code edition throughout the remainder of the permitting process, even if plan review comments, revisions, or deferred corrections are later required.
For the current cycle, that transition period has now ended.
The 2025 Oregon Structural Specialty Code (OSSC) became effective on October 1, 2025, with a six-month phase-in period running through March 31, 2026. During that window, permit applications could be submitted under either the 2022 OSSC or the 2025 OSSC.
As of April 1, 2026, all new permit applications must comply with the 2025 OSSC and associated updated specialty codes. Projects can no longer be submitted under the 2022 OSSC.
Important Note for Residential Projects
Most residential projects are not affected by this deadline. The Oregon Residential Specialty Code (ORSC) — which governs most detached single-family homes, duplexes, and townhouses — follows a different adoption timeline.
The current 2023 Oregon Residential Specialty Code remains in effect for residential construction. The next update to the residential code is anticipated in the 2026 code cycle, with implementation expected in 2026 or early 2027 following the standard rulemaking and phase-in process.
If you are planning a typical residential remodel or new home build, the April 1 OSSC transition deadline most likely does not apply to your project. However, it is worth confirming the applicable code with your design team before submitting.
Why This Code Transition Matters Now
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 or mid-review, this creates an important decision point.
If your permit was submitted before April 1, 2026:
Your project is likely still under the 2022 OSSC — verify with your jurisdiction
Significant design changes may require re-evaluation under the new code
If you are submitting now:
The 2025 OSSC applies — no exceptions
Projects designed under the 2022 code may need documentation revisions before submission
Understanding how Portland's permitting timeline works is especially relevant here — code revision requests during review can add weeks to an already lengthy process.
Potential Impacts of the New Code Edition
While many provisions remain consistent between code cycles, updates can affect several technical areas. Even relatively small changes can require updates to design documentation or engineering coordination during permitting.
Structural design provisions
Fire and life safety requirements
Accessibility standards
Mechanical and building system coordination
Energy efficiency requirements
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 — or are currently in review — should evaluate their position carefully.
Property owners and development teams should consider whether design changes would be required under the new code, and whether any revisions to existing documentation are needed before submitting. Early coordination with your design team can help avoid last-minute delays or correction cycles during review.
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.
Not sure which code applies to your project?
JR DBA helps property owners and developers in the Portland region navigate code transitions, permit strategy, and submission timing.
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.
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