A backed-up sewer brings the same questions: what it will cost, whose pipe it is, and whether the yard gets dug up. Here they are, answered from our own 2026 sewer jobs between Seattle and the Snoqualmie Valley.
How much does sewer line repair cost on the Eastside in 2026?
On our 2026 invoices, tax included, clearing a backed-up line ran about $450 to $1,800, digging out and replacing a short damaged section about $3,000 to $8,000, and lining a whole side sewer without digging it up about $15,000 to $20,000. The price follows what the camera finds, not the symptom.
What moves it: how deep and how long the damaged section is, what sits on top of it (lawn, driveway, deck or slab), the pipe material, and whether one spot has failed or the whole line. Homes on septic have their own price ladder, which our Fall City sewer page lists.
What does it cost just to clear a backed-up sewer line?
Cabling a main from a cleanout or through a toilet flange ran about $450 to $1,000 on our 2026 invoices, and hydro jetting the line with a camera run before and after about $1,000 to $1,800. A camera inspection on its own has run about $300 to $650.
Jetting costs more because it scours roots and grease off the pipe walls instead of punching a hole through the blockage, and the camera shows whether anything is broken underneath.
Why does my sewer keep backing up after it's been cleared?
Because clearing removes the blockage but not the reason it formed. On our 2026 jobs the reasons were sections that had settled into a belly or lost their slope, roots growing in at joints, and pipes that had separated where two materials meet. A camera run after clearing shows which one you have.
A line that keeps backing up on a schedule is pointing at one of those spots, and the repair is aimed at that spot rather than the whole line.
Is lining a sewer pipe cheaper than digging it up?
Not usually. Our 2026 linings ran about $15,000 to $20,000, while dug-out repairs of a short section ran about $3,000 to $8,000. Lining earns its price when the damage runs most of the line's length, or when the pipe sits under a driveway, patio or mature trees you don't want disturbed.
Lining is an accepted way to repair a side sewer. Seattle allows it under a side sewer permit with an inspection, and Redmond lists lining among the side sewer work that needs a permit before it starts.
Is the sewer pipe under the street my responsibility?
In Seattle, Kirkland and Redmond, yes: the side sewer is yours all the way to the public main, including the part under the street. Bellevue maintains the part of the connection inside its right of way, and Issaquah maintains the main and the fittings where your line joins it. The pipe on your own property is yours everywhere.
King County runs the regional pipes and treatment plants but does not own local sewers. Your city or sewer district owns the mains, and it can tell you where its part ends before anyone digs.
Do I need a permit to repair my side sewer?
In Seattle, Bellevue and Redmond, yes. Seattle requires a side sewer permit for any repair or replacement, issued by Seattle Public Utilities since October 2025, plus a street-use permit for work in the right of way. Bellevue and Redmond require a side sewer permit before any work starts.
Homes on septic follow a different set of rules, which our Fall City sewer page covers.
Why do sewer repair quotes vary so much?
Because the same few feet of pipe can sit under a lawn, a deck or a concrete slab. In August we repaired about seven feet of sewer running under a slab addition in Mountlake Terrace, which meant moving the water heater and laundry first; that job topped $28,000, more than any lining we did this year.
Ask each company what it found, where and how deep, and compare methods as well as prices.
How long will my sewer be out of service during a repair?
Usually a day. Most of our 2026 repairs of a short, dug-out section were finished in one visit, and linings took one or two days on site. Replacing a full run inside a house takes longer: the Fall City basement main we replaced in June took three days.
Clearing a backed-up line, by contrast, is usually done in a single visit.
Talk to Us About Your Sewer Line
Call 425-549-2400 or schedule an appointment.
More: sewer line services · sewer line repair in Fall City · drain cleaning · horizontal boring · Snoqualmie Valley plumbing questions