Learn about environmental soils and applying for a septic permits - new construction septic permit, alteration septic permit and repair septic permit in Multnomah County. Get the required forms and information about sewage permits, septic system permits and sewage disposal permits.
Required and important septic installation permit application forms
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
- 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)
- 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 Onsite Septic Permits and Inspections.
- Department of Environmental Quality (DEQ) surcharge is to be paid along with the fee
How to submit your completed application
Mail the completed application, related materials and fees to Onsite Septic Permits and Inspections. They will notify you if a site visit or an authorization notice is required.
Email complete submittal application package (checklist is on application) to firstname.lastname@example.org. A permit will be set up and information emailed to applicant providing information required to submit credit card payment over the phone with the BDS Cashier.
Plan review process and checksheets
Allow a minimum of twenty days for review. You will be notified of status by either a checksheet or an issued permit.
Checksheets will be sent to applicant and property owner requesting additional information and/or plan revisions if corrections are required. Third and subsequent checksheets will require an additional fee.
Applications will be cancelled if no response to checksheet within 90 days. New fees will apply.
Septic permit inspections
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.
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 Onsite Septic Permits and Inspections.