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Septic Permits- Alterations, New Construction and Repair

Learn about applying for a sewage permits like a new construction septic permit, alteration septic permit and repair septic permit in the City of Portland. Get the required application form and more information about sewage permits, septic system permits and sewage disposal permits.

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Required septic installation permit application form

What you need to get a septic permit 

For alteration permits, new construction permits and repair septic permits, you'll need the following: 

  • An application to install a new on-site sewage disposal system (installation permit) requires a Septic Installation Permit Application
  • You will need an approved Land Feasibility Study to submit with your installation permit application
  • You must be both the owner and occupant of the house in order to do the installation work yourself. This work may not be done on a dwelling that is now or will be for sale, lease, rent or exchange in the near future.
  • For other residential or commercial properties, a licensed State of Oregon, Department of Environmental Quality (DEQ) installer must do the installation
  • If you have any questions, please call the Environmental Soils Section phone number
  • Note, a Department of Environmental Quality (DEQ) surcharge is to be paid along with the fee

Apply for a septic permit 

Along with the completed permit application, the following items are needed:

  • Land Feasibilty Study Number (for new construction and for major repair) or a Land Use Compatibility Statement from Multnomah County (for alterations only)
  • Scaled legible site plan showing all existing and proposed structures, proposed septic system, and private well (if applicable)
  • Detailed floor plan (Not required for minor repair - 4 bedrooms or less)

Plan review process for septic permits

Development Services review groups that will review the installation permit application are:

  1. Planning and Zoning
  2. Addressing
  3. Septic Review
  4. Plumbing Review
  • The approved permit will be mailed to the applicant. The permit must be posted on the job site.
  • If the application is incomplete, you will be notified by Site Development/Septic Review staff and asked to submit the necessary corrections
  • After the corrections are received, your application will be reviewed again.

Get ready for septic permit inspections

When you get a permit, you may call to schedule an inspection. 

Schedule a septic permit inspection

To schedule an inspection, call the automated inspection request line. You will need your IVR or permit number and the three digit code for the inspection. You will receive a call with the time window for the inspection.  

Septic inspection results and corrections

Get the results of the inspection on Portland Maps permit/case search the next day.

Not approved - there are some reasons why the work did not get approved:

  • no access - the inspector may not have been able to inspect the work
  • incomplete work
  • code violations

The inspector will list the corrections needed on the inspection report. 

Call for a reinspection after making the corrections. Use the same three digit inspection code.
If you make the corrections the same day wait until 5 p.m. to request a reinspection. The inspector needs to enter their results before you can schedule the reinspection.

There is a reinspection fee charged for more than one reinspection for a single issue.

When the inspection has been approved, you may cover the cesspool or septic tank.

Contact septic inspectors

If you have questions about septic inspections, you can talk to an inspector between 7 a.m. - 8 a.m. on business days by calling Site Development & Septic Review.


Site Development & Septic Review

phone number503-823-6892

Monday through Friday from 8 am - 5 pm. Leave a message with detailed information.

Mailing address

BDS Attention: Site Development
1900 SW Fourth Avenue
Portland, OR 97201