Sewer Line Replacement

One Lateral, Replaced End To End

Replace the Whole Sewer Line, Not Another Patch

When backups keep returning at new spots along the pipe, the problem is rarely one spot. It is the entire line. A sewer line replacement swaps out the whole lateral, from your house connection to the city main, so you stop paying to patch a pipe that has already given up.

Aces Four has dug and replaced sewer laterals across Seattle since 1978. We are family-owned, licensed, and bonded, and we run our own excavation crew, so the same team that scopes your line is the one that digs it and puts your yard back. For one bad stretch, a sectional fix on our sewer pipe replacement page may be all you need. When the full run is failing, this is the page for it.

You see the camera footage before any decision gets made.

Past The Point Of One More Repair

When Does a Full Sewer Line Replacement Make Sense?

A single crack gets repaired. A whole line at the end of its life does not. These are the cases where replacing the entire line beats another round of spot fixes:

✓The Line Has Failed in Several Places
When the camera finds cracks, breaks, or roots at several points along the pipe, fixing one spot just pushes the next backup further down.

✓There Is Nothing Sound Left to Line
Trenchless lining needs a host pipe in fair shape. A collapsed or crushed line gives it nothing to grip, so it has to come out and go back in new.

✓Orangeburg or Clay Tile the Full Length
Many older Seattle homes still run on Orangeburg or clay tile the whole way to the main. These materials break down along the entire length, so replacing the full line is the only fix that holds.

✓The Run Has Lost Its Grade
When a line sags and pools water in the low spots, waste settles and clogs there over and over. It has to be dug out and reset to the right slope, not patched.

✓A Sewer Scope Stalled Your Home Sale
A failed inspection can freeze a closing. When the report flags the whole lateral, buyers and lenders want it replaced before the deal moves, and a full line clears the report.

Not sure whether it is one section or the whole line? We scope it and show you the footage before recommending anything.

ACES FOUR Sewer Line Replacement

(425) 672-4811

Monday to Friday
8:00 am - 5:00 pm

Serving Seattle and Surrounding Areas!

Compact teal excavator digging a narrow trench along a dirt road for sewer line installation.

We Lay Out Every Route Your Line Can Take

Open-Cut Sewer Line Excavation, and When Trenchless Fits

We do not pick the method that is easiest for us. We price every option your line can take and let you choose.

Most full-line jobs come down to two paths:

Open-cut. We dig a trench along the lateral and lay new pipe. This is the direct route for a collapsed pipe, a long sag, or easy digging access. It also lets us reset grade exactly and shift the line to a better route when the old one runs under a slab or a deck.
Trenchless. When the line qualifies, we can pull new pipe through the old path with far less digging, which spares driveways and mature trees. It does not fit every job, so we camera and locate the line first. For how that works, see our trenchless sewer repair page.

In tight or congested spots, we can use hydro excavation to dig around gas, water, and power without striking them.

For pipe, we install PVC Schedule 40, SDR 35, and HDPE, sized to the job. On most homes that means a 4-inch line across private property and a 6-inch line in the public right-of-way. We tell you which material and diameter your run calls for, and why, before we start.

From First Camera Pass To Final Backfill

Everything a Full Line Replacement Puts In the Ground

A new lateral goes in one stage at a time. Here is what each stage covers.

Before we dig

Camera inspection and line locating to map the route, depth, and grade
A written scope with the method options priced side by side
The Seattle side sewer permit and any right-of-way permits, plus 811 locates

In the trench

Excavation, shoring, and dewatering where the site needs it
The old line removed or abandoned
New line set to correct slope and tied into both the city main and your house stub
A cleanout added, and a backwater valve where code requires or you ask for one

Before we leave

A final camera pass down the finished line
City inspection scheduled and attended by our crew
Backfill, compaction, and restoration of concrete, asphalt, and pavers
As-built records handed to you for your files

Hard-surface restoration is written into the estimate from the start, so a cut driveway or broken slab is part of the quoted number, not a bill that shows up after.

Wet concrete poured into a deep trench during underground utility work

Who Owns the Sewer Line, and Where Your Responsibility Ends

This is the question that catches most homeowners off guard, so here is the plain answer.

In the Seattle area, the property owner is responsible for the side sewer, the private line that carries waste from the house out to the public main. That responsibility covers the full run on your property. When the line crosses into the public right-of-way to reach the main, the work there is still coordinated through the city and permitted, and we handle that side of it as part of the job.

What this means in practice:

A failure anywhere along your lateral is yours to fix, even the buried stretch you never see
Replacing the line usually means work on both private ground and, where the connection sits, in the right-of-way
We pull the permits and schedule the inspections for both, so you are not chasing paperwork

If you are unsure where your line runs or how deep it sits, our camera and locator map it before any shovel goes in.

What Affects Your Sewer Line Replacement Cost

No two laterals price the same, so we quote each main sewer line replacement after seeing the pipe, not off a chart. Your sewer line replacement cost comes down to a handful of things:

Length of the run. A long reach to the city main means more pipe, more digging, and more to restore.
Depth of the line. A deep lateral takes more excavation and, at times, shoring and dewatering.
Method. Open-cut and trenchless carry different costs, and feasibility depends on the pipe's condition and path.
Material and diameter. The size and type of pipe the run needs moves both material and labor.
Site access and surfaces. Tight lots, utility conflicts, and concrete or asphalt over the pipe all add work.
Permits and traffic control. City fees, and flaggers for right-of-way work, are listed on their own so you see them.

We do not post a price range, because a wrong guess helps nobody. Instead we scope your line and lay out the method options side by side, then hand you a written estimate for the sewer line replacement in Seattle. You can request a free quote to get started. Financing is available if you would rather spread the cost.

Side Sewer Permits and Inspections in Seattle

Replacing a side sewer in Seattle takes a permit, and the finished line has to pass a city inspection. Skipping it tends to backfire. An unpermitted line can surface during a future sale or draw a fine.

Requirements also shift across the Eastside and into Snohomish County, so confirm the specifics with your local jurisdiction. In Seattle, side sewer permits are typically handled through Seattle Public Utilities. Our guide to Seattle side sewer permits walks through what to expect.

We manage permitting end to end:

The side sewer permit application
811 utility locates before we dig
Right-of-way or street-opening permits for work near the main
The city inspection, scheduled and attended by our crew

You end up with a permitted, inspected line and the records to prove it.

Deep Trenches And A City Connection

Why This Job Isn't One to Hand a Handyman

Replacing an entire lateral means permits, deep trenches, live utilities, and a connection to the city main that has to pass inspection. An unshored trench is a safety risk, and a bad tie-in gets rejected.

It is the kind of job you want done once, by a crew that handles the whole thing. One customer said the team was "professional, hardworking, and knowledgeable throughout," and "treated my property with care, leaving the area clean when they were finished." Here is what handing it to Aces Four gets you.

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We Map the Whole Run First

Before we dig, we camera and locate the full lateral, so the plan matches the line's real depth, grade, and path. You do not pay to open ground we did not need to touch.

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One Crew From Scope to Backfill

We run our own excavation team, so the people who diagnose your line are the ones who replace it and restore the site. Nothing gets dropped in a handoff between a camera company and a dig crew.

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The Main Connection Done Right

Tying a new lateral into the city main is the part that has to pass inspection. We make that connection, coordinate with the city, and attend the check ourselves, so it clears the first time.

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A Long Trench, Put Back Properly

A full run can mean a trench across your yard and driveway. We backfill, compact, and restore concrete and asphalt as part of the job, so the surface holds instead of settling later.

How long does a sewer line replacement take?

It depends on the length and depth of the run and the method. Many residential jobs wrap up in a few days once permits, excavation, the main and house connections, inspection, and restoration are counted. A long or deep run can take longer. Your sewer is only out of service for a short stretch during the swap itself, not the whole project.

Does insurance cover sewer line replacement?

It varies by policy. Standard homeowner policies often exclude a worn-out or failing lateral, though some cover sudden damage or offer a separate service-line rider. Check your policy language, and we can provide the documentation and camera footage your insurer asks for.

Who is responsible for the part of the line under the street?

As the property owner, you are responsible for the side sewer that serves your home, including the private line on your property. Where the line runs into the right-of-way to meet the main, rules vary by jurisdiction, so we confirm who covers what before the job and coordinate that portion with the city either way.

Do I need the whole line replaced, or just a section?

Not every line needs a full replacement. If the damage is one bad stretch, a sectional repair may be the right call. If the run has failed in several places, lost its grade, or is old Orangeburg or clay end to end, replacing the full line is the lasting fix. We scope it first and show you the footage.

What does a new sewer line cost in Seattle?

There is no flat rate, because length, depth, method, pipe size, access, and restoration all move the number. We scope your line and hand you a written estimate with the method options laid out. Financing is available if you want to spread the cost.

How long will a new sewer line last?

A properly installed line lasts for decades. Modern PVC and HDPE resist the cracking, corrosion, and root intrusion that killed the old clay or Orangeburg pipe, so a new line set to correct grade should outlast most of what it replaced. Exact life depends on soil, use, and material.

Can you review a replacement quote from another contractor?

Yes, and the review is free. We scope your line ourselves and give you an honest read on whether the work and method another company quoted actually fit your property. Sometimes a full replacement is not what the line needs, and we would rather tell you that.

Is the work under warranty?

Yes. Our workmanship on a full line replacement is backed by a two-year warranty, and it transfers to the next owner if you sell. Pipe and fittings also carry their manufacturer warranty. You get the coverage terms in writing with your estimate.

Stop Patching, Start Fresh

Get Your Seattle Sewer Line Scoped and Replaced

When the whole run is failing, replacing it once beats another year of patch jobs. Aces Four scopes your sewer line replacement, prices the options, pulls the permits, and restores your site, all with our own Seattle crew.

Call (425) 672-4811 or request a free quote online to get your line scoped and a written estimate.

In-house crew with nearly 50 years of experience

Licensed, Insured, and Bonded

Clear answers about cost and timeline before work begins

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