Sewer Line Repair Portland: $150 to $3,800 + Permits (2026)

National figures; we found no Portland-only sewer price. Work in the right-of-way needs a second city permit, which adds cost.

Do this now: sewer backing up in a Portland house

1. Stop running water: no flushing, laundry or dishwasher until the line is cleared.
2. Keep people and pets away from sewage. Wear gloves and boots if you must go near it.
3. If neighbors are backed up too, the City's side may be blocked: call the City at 311 or 503-823-4000.
4. If it is only your house, call a plumber to clear the line and run a camera to find the break.
5. Photograph the damage and call your insurer before throwing anything out.

Is it an emergency? Sewer signs that need a plumber today

A sewer problem is an emergency when sewage is coming up into the house, every fixture is draining slowly at once, or you smell sewer gas indoors. Those need a plumber the same day. Gurgling in one drain or a slow tub can wait for a weekday visit and a camera inspection, which HomeGuide prices at $100 to $500 nationally. Cleanup after a backup is covered on sewage cleanup.

Who owns the sewer line in Portland: you pay to the curb

Portland homeowners pay for their sewer line from the house all the way to the curb. The City of Portland says the property owner is responsible for the line coming from the house to the curb, including the section under the sidewalk and parking strip, and the City maintains the lateral from the main sewer, under the street, to the curb line. Newer homes connect at the property line; older homes connect at the curb, so on an older house more of the pipe is yours.

Portland's median home was built in 1966, against a U.S. median of 1980, and 82,545 of its 307,719 housing units (26.8%) were built in 1939 or earlier, the Census Bureau's 2020 to 2024 American Community Survey shows. Old clay and cast iron laterals are where roots and breaks show up, so ask for the camera video and a written description of where the defect is.

Two permits for sewer work across the property line

A repair that runs from the house to the curb usually needs two permits in Portland. A plumbing permit covers work from the house to the property line, and a right-of-way permit from Transportation covers the property line to the curb, the City says. A repair across both needs both permits and two inspections. Ask the plumber who pulls each one and whether both are in the price.

If the City orders a sewer repair

If the City finds a broken private line and the owner does not repair it within 30 days of notice, the City can do the work and place a lien on the property for the cost plus overhead and civil penalties. Contacts listed on the City's page: Property Compliance 503-823-2633, the Environmental Services nonconforming sewer hotline 503-823-7869, and maintenance and dye tests 503-823-1700. We found no City cost-share or warranty program for private laterals.

Local rules, programs and climate for Portland, from the official pages listed under Sources.

Questions to ask a Portland sewer contractor

1. Can I have the camera video and the footage marker where the break is?
2. Is the damage on my side of the curb or under the street?
3. Will you pull both the plumbing and right-of-way permits?
4. What is your CCB number, and can I see proof of insurance?
5. Is trenchless repair possible here, and what does each method cost?

More Portland plumbing guides

All Portland plumbing: plumber in Portland. A backup at night: emergency plumber in Portland. Sewage in the basement: water damage restoration in Portland. Other cities: sewer line repair in Seattle and sewer line repair in Sacramento. National guides: sewer line repair, drain cleaning and home repair costs.