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The City of Portland, Oregon

Development Services

From Concept to Construction

Phone: 503-823-7300


1900 SW 4th Ave, Portland, OR 97201

More Contact Info

Getting Started

  • An application for alteration of an existing on-site sewage disposal system (alteration permit) requires a septic installation permit
  • You must be both the owner and occupant of the house in order to do the 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 has to do the installation
  • If you have any questions, please call the Environmental Soils Section at (503) 823-6892
  • Note there is also a Department of Environmental Quality (DEQ) surcharge is to be paid along with the fee