Building permits and plan check in Cornelius
City of Forest Grove handles building permits for the City of Cornelius. Here is what we could verify about City of Forest Grove’s permit office, what Oregon law says about plan check, and how to answer a correction letter. Each fact links to its source.
Who handles building permits in Cornelius
Building permits for Cornelius are handled by City of Forest Grove, so plan check corrections and resubmittals go to City of Forest Grove. (corneliusor.gov, checked October 31, 2026)
City of Forest Grove permit office
- Building Division: 503-992-3229 (forestgrove-or.gov, checked October 31, 2026)
- Address: 1924 Council Street, Forest Grove, OR 97116 (forestgrove-or.gov, checked October 31, 2026)
- Building department page
Links and facts checked on October 28, 2026.
See the full Forest Grove plan check guide
Contacts at the City of Cornelius
- Building department: 503-992-3227 (corneliusor.gov, checked October 31, 2026)
Links and facts checked on October 28, 2026.
Cornelius and Washington County
Cornelius is in Washington County. See the Washington County guide.
Oregon rules every plan check here follows
These come from Oregon law and state agencies, so they apply in Cornelius as well. Each links to its source.
Residential code
The 2026 Oregon Residential Specialty Code took effect on Oct. 1, 2026. Chapter 1 is already mandatory; Chapters 2 - 44 and the appendices become mandatory on April 1, 2027.
Source: Oregon Building Codes Division, checked October 31, 2026
Commercial (structural) code
Commercial buildings follow the 2025 Oregon Structural Specialty Code. It took effect Oct. 1, 2025, and after a 6-month phase-in became mandatory on April 1, 2026.
Source: Oregon Building Codes Division, checked October 31, 2026
Commercial energy code
Energy rules for commercial buildings come from the 2025 Oregon Energy Efficiency Specialty Code, mandatory since July 1, 2025.
Source: Oregon Building Codes Division, checked October 31, 2026
Electrical code
Electrical work follows the 2026 Oregon Electrical Specialty Code, based on the 2026 National Electrical Code, in effect since Oct. 1, 2026.
Source: Oregon Building Codes Division, checked October 31, 2026
Plumbing code
Plumbing work follows the 2026 Oregon Plumbing Specialty Code, based on the 2024 Uniform Plumbing Code, in effect since Oct. 1, 2026.
Source: Oregon Building Codes Division, checked October 31, 2026
What a good response to plan check corrections has
General guidance, not the City of Cornelius’s own rules. Check its page before you resubmit.
- Answer every comment, in the reviewer’s order and numbering, so nothing is missed.
- Say plainly what you changed for each comment, or why no change is needed.
- Name the sheet and detail where each change is, so the reviewer can find it fast.
- Mark changes on the drawings (clouds or deltas are common) and keep sheet numbers the same.
- Send the response letter, the revised drawings and any new calculations together.
Other Oregon city guides
How we help
Send us the whole correction letter. We draft a response to every comment and list the drawing changes sheet by sheet. Your first letter is free. You review each response, then you sign and submit to the City of Cornelius yourself.
Cleared to Build is an independent service. We are not the City of Cornelius and are not affiliated with it.
Upload your correction letterOnly one comment to answer? Try the free one-comment tool.
Questions
Who handles building permits in Cornelius?
City of Forest Grove does. Send plan check corrections and resubmittals to City of Forest Grove, the way its own pages ask.
Is Cleared to Build part of the City of Cornelius or City of Forest Grove?
No. Cleared to Build is an independent service, not affiliated with the City of Cornelius, City of Forest Grove or any permitting agency. You submit yourself.