Cost guide
How much does sewer line replacement cost in Kenmore?
Sewer Line Replacement cost in Kenmore, WA: what sets the price, and who owns the sewer under the street (the city or district). Free estimates.
The short answer
The price of replacing a side sewer comes down to how long and deep the line is, which method fits it (trenchless or open trench), what sits on top of it, and whether your city makes the section under the street yours. A camera inspection and a free estimate turn those variables into a written number for your property.
Your number
Your price comes from your line — not a chart
We'd rather give you a real number than a range that doesn't fit your property. The estimate is free: we look at what your job actually needs and put every viable option in writing with its price.
- Pipe bursting — New pipe pulled through the old path from two access pits
- Open-trench replacement — Excavate, replace and restore along the line
- Replacement under the street — Right-of-way work where your city makes it yours
What's different in Kenmore
Who pays for the pipe under the street
In Kenmore the utility maintains the section in the public right-of-way, so your project usually stops at the property line or the connection — which keeps street work and street restoration off your bill.
Kenmore is served by Northshore Utility District, which maintains and operates the sewer system in the public right-of-way. Sewer piping on private property is treated as an extension of your plumbing and is yours.
Northshore doesn't charge for sewer repair permits, and its crews will help work out whether a problem is in your pipe or theirs — free, 24 hours a day.
- Under your yard
- Yours
- Under the street
- The utility's
- The public main
- The utility's
What sets the price
The cost of sewer line replacement comes down to these.
Length and depth of the line
A longer or deeper side sewer means more pipe, more excavation at the access points and more labor. Depth also decides how much shoring and safety work a trench needs.
Method: trenchless or open trench
Pipe bursting replaces the line through its existing path from access pits; open trench digs the whole run. Which one fits depends on the pipe's condition, alignment and what is around it — not on preference.
What's on top of it
Lawn costs far less to restore than a driveway, mature landscaping, a retaining wall or stairs. Trenchless methods often avoid most of that restoration.
Under-the-street work
In Seattle you own the side sewer all the way to the public main, so a break under the street — and restoring the street — is part of your project. Some neighboring cities maintain that section themselves.
Permits and inspections
Side sewer work needs a permit from your city or sewer district, and right-of-way work can need more than one. Fees vary by scope and change over time.
Shared or unusual lines
Some older Seattle blocks share one side sewer between houses, and older lines can run under foundations or neighbors' yards. Locating the line first avoids surprises.
What you're paying for
Compare scope, not just the total
Two quotes for "sewer line replacement" can describe very different jobs. These are in ours — check whether they're in the others.
How we do sewer line replacement- A camera-verified diagnosis — the recommendation comes from what the camera shows
- Every viable option laid out, with the trade-offs, before you choose
- Permit requirements explained and built into the written scope
- Restoration spelled out in the written estimate
- A final camera pass, where it applies, before the job is called done
- Financing available through Service Finance
- Transferable lifetime parts-and-labor warranty on full sewer replacements, subject to the written warranty terms
Sewer Line Replacement cost: questions people ask
Why can't you give me a price over the phone?
Because the variables that set the price — length, depth, pipe condition, what's on top of the line and whether the street section is yours — are only known after the line has been located and seen on camera. A phone number would be a guess; the estimate is free.
Does trenchless replacement always cost less than digging?
Not always. It often costs less once restoration is counted, because a driveway or landscaping stays put, but it only fits some lines. We show you both when both are viable.
Does homeowners insurance pay for a new sewer line?
Usually not for the pipe itself. Standard policies treat it as maintenance; a separate service line endorsement can cover it. Check your own policy.
More of the questions we hear every week are on the FAQ page .
Ready when you are
Let's put a camera down the line and see.
Free estimates and free second opinions, open 24/7/365 across the Greater Seattle & Puget Sound area. Call and a real Pro Sewer team member picks up.