Plumbing Permits- Commercial
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Source: Plumbing Permits- Commercial ↗ Last modified: Sun, 19 Apr 2026 20:11:21 GMT
The form takes 15 minutes to complete if plans are not needed.
Who can do commercial plumbing work
If you operate a business in a commercial structure or at a commercial use site, a licensed plumbing contractor must buy the permit and do the work.
Contractors must have a license to work in Oregon. The Oregon Construction Contractors Board ↗ (CCB) issues licenses to contractors. The permit application (below) and the contractor's company materials must list the license number.
All plumbing contractors additionally must be licensed by the Oregon State Plumbing Board (PB). ↗
Installation of sanitary sewers starting five feet outside a structure also require a Plumbing Business (PB) license and CCB license.
Need help finding a contractor? The CCB website has good tips on how to search for one.
You can find information about residential plumbing permits on the Plumbing Permits—Residential webpage ↗.
Homeowners doing condo plumbing projects
If you own a condo, you may be able to do some simple plumbing projects yourself. Please call the number listed on this webpage for Commercial Plumbing Inspections with questions.
Apply for a commercial plumbing permit
- If plan review is not needed, you can get your commercial plumbing permit online using Development Hub PDX ↗. Get step-by-step instructions ↗ to submit a permit application request online. You can also submit your completed application by email.
- If your plumbing permit needs plan review, the plumbing plans should be submitted with your commercial building plans on Development Hub PDX ↗. The plumbing permit application should be emailed to us separately.
Call the General Inquiries phone number if you have questions about getting a permit.
Plumbing permit application
Backflow prevention assembly information and sample site plan
Water may require that you install a backflow prevention assembly ↗ at the property line. You'll install the assembly on your property on the center line of the City water service. Call Water at 503-823-7480 to learn more. You can also find more information in the sample site plan (often called a plot plan):
If you've already had a plumbing plan review, complete these steps
If your commercial building permit has had a plumbing plan review, complete these steps to get your plumbing permit:
- Verify that plumbing plan review was approved for your commercial building permit
- Fill out the plumbing permit application (above)
- Email us the completed application