In Seattle the pipe that carries wastewater from your house to the city main is called a side sewer, and it belongs to you, all the way to the connection. Under most homes built before 1960 that pipe is clay, concrete or tar-paper Orangeburg, and after a century of tree roots and ground movement it is usually the last original system in the house. Nic’s Plumbing puts a camera down it first, shows you the footage, and prices spot repair, trenchless lining or full replacement as three options you approve before anyone digs.
- Seattle’s termSide sewer: the private lateral from the house to the main, maintained by the homeowner
- Typical materialsVitrified clay, concrete, cast iron and Orangeburg in pre-1960 homes
- Permit ruleSPU Side Sewer Permit for any repair or replacement; none needed for root cutting or unclogging
- How we quoteCamera inspection first, then Good / Better / Best digital pricing approved before work
“Is this just a time bomb?” What is going on under an old Seattle yard
Most homeowners meet their side sewer as a floor drain that burps, a toilet that gurgles when the washer drains, or a slow line a rooter company clears every spring. Root cutting works, right up until it doesn’t. Each pass through a clay joint the roots have already pried open widens the gap a little, and one wet November the line stops draining at all.
Here is what the camera usually finds under a Queen Anne foursquare or a Ballard bungalow. Clay pipe was laid in short sections with a joint every few feet, and roots from the big maples and cedars that make these streets beautiful find every one of those joints. Concrete pipe softens and scales. Cast iron under the house rusts through from the bottom. Orangeburg, a mid-century pressed-fiber pipe, slowly flattens into an oval and then collapses. Add a low spot where the ground settled (plumbers call it a belly) and you have a line that holds standing water and catches everything that goes by.
The stress in the sewer decision is rarely the pipe. It is the not knowing. People tell us the trenchless quote made their head spin, that three companies gave three different answers and none of them did a full camera run, or that somebody shared a video “to justify the estimate” and they had no idea what they were looking at. We start by fixing that part.
Old-house note: who owns what, and when a permit is needed
In Seattle the homeowner is responsible for the side sewer from the house to the public main, including the stretch under the sidewalk and street. As of October 2025, Seattle Public Utilities issues the Side Sewer Permit, and one is required any time pipe or an outside fixture such as a cleanout is repaired or replaced, on private property or in the right-of-way. Root removal and unclogging do not need a permit. If our work reaches the planking strip or street, an SDOT Street Use permit is requested from within the same SPU application. We handle all of it and schedule the inspection. Many older lots also have a public side sewer card, a drawing of the lateral as it was installed, which we pull before the camera goes in. The full picture is in our Seattle side sewer guide.
Camera first, always. Then the options.
Nobody at Nic’s Plumbing quotes a side sewer from the driveway. We run a camera the length of the line, from the cleanout (or the pulled toilet, if the house has no cleanout) to the main, with a locator overhead marking depth and position at every problem we find. You watch the screen with us. A root-cracked joint, a collapsed section and a belly are three different jobs, so the footage decides the plan, not a sales script. You get the recording and a marked-up sketch even if the answer is “keep rodding it for now.” Read more about sewer camera inspection for older Seattle homes.
Once we know what the line looks like, the honest answer is usually one of three shapes. We write each one up as a tier with its own price, and the tier you approve is the number on the invoice.
Spot repair
One offset joint, one root-broken section, one cracked wye near the main. If the camera shows a single fault in an otherwise sound line, we fix that section and leave the rest alone.
- Full camera run and locate, recorded for you
- Small targeted excavation or a short sectional liner
- New cleanout added if the house never had one
- Plain note on what the rest of the line looks like
Trenchless lining (CIPP)
A resin-saturated liner is pulled or inverted through the existing pipe and cured in place, sealing cracks and every root-inviting joint with a continuous new pipe inside the old one.
- Everything in Good
- Hydro-jetting and root removal to prepare the host pipe
- Full-length or sectional liner, cured and camera-verified
- Lateral reinstated at any branch connections
Full replacement: pipe bursting or open trench
The old pipe comes out of service entirely. Pipe bursting pulls a new HDPE line through the old path from two small pits; an open trench is the answer when the pipe has collapsed or the grade has to be corrected.
- Everything in Better where it applies
- New HDPE or PVC line, house to main, properly graded
- Bursting can upsize the line where the house needs it
- Permits, inspection, and yard restored as agreed
“Best” is not automatically our recommendation. If your footage shows one bad joint, we will tell you a spot repair is the right call and that a full replacement would be spending money on pipe that still works. If the line is Orangeburg or has a deep belly, we will tell you a liner is the wrong call, because a liner follows the shape of the pipe it is in. Either way you are choosing among three options we would put our name on. Here is how the free Good / Better / Best quote works.
Lining, bursting or dig-and-replace: the honest comparison
Trenchless is a wonderful thing under a rockery or a Wallingford sidewalk, and it is not the answer for every line. The camera tells us which of these fits yours.
| Consideration | Pipe lining (CIPP) | Pipe bursting | Dig and replace |
|---|---|---|---|
| Best suited to | Cracks, root-open joints, minor offsets in pipe that still holds its shape | Badly broken or undersized pipe on a clear path from house to main | Collapsed pipe, bellies and grade problems, shallow lines in open ground |
| Digging required | Usually one access point, often the cleanout | Two small pits, at the house and near the main | A trench along the full run |
| Yard, sidewalk and landscaping | Largely untouched | Largely untouched between the pits | Disturbed; restoration is part of the quote |
| Fixes a belly or sag | No; the liner follows the old pipe’s shape | No; the new pipe follows the old path | Yes; the trench lets us set correct grade |
| Pipe size afterward | Slightly smaller inside diameter | Same size or upsized | Whatever the house needs |
| Orangeburg | Rarely suitable once the pipe has deformed | Usually a good fit | Always possible |
| Typical time on site | Often a single day | Often one to two days | Longer, depending on depth and length |
Two deeper reads if you are weighing this now: pipe lining vs. pipe bursting for the two trenchless methods head to head, and trenchless vs. dig-and-replace for when the old-fashioned trench is genuinely the better buy.
How a side sewer job goes with Nic’s Plumbing
Look
Pull the side sewer card, run the camera and locator the full length of the line, and walk you through the footage on the spot.
Options
Spot repair, lining, or full replacement, written up as Good, Better and Best with what each includes. You approve one on your phone before we schedule.
Permit and protect
We file the SPU Side Sewer Permit (and the SDOT permit if the work reaches the street), call in utility locates, and lay runners and plywood over lawns, paths and any interior floors we cross.
Fix it properly
Jet, line, burst or dig according to the plan you approved. Nothing gets backfilled until the inspection is done and the finished line has been on camera.
Prove it
Before-and-after footage and photos, a sketch of the new line and cleanout locations, and the yard put back the way the quote said it would be.
On the day, you get a live link so you can watch the crew on the way instead of guessing when the excavator shows up. Tech en route · live map That is the same standard every job runs on; the whole thing is written out on our process page.
What the before-and-after documentation shows on a side sewer
The inspection footage with distance markers: root masses at each joint, the offset or crack, standing water in a belly, the flattened Orangeburg, and locator marks on the lawn showing exactly where each fault sits and how deep.
The post-repair camera run of the same footage markers: a smooth cured liner, or new HDPE from house to main, the new cleanout, the passed inspection, and the yard, sidewalk and interior floors as we left them.
Sewer backups in Ballard, Fremont, Wallingford and north Queen Anne
Those neighborhoods sit on Seattle’s combined sewer system, where sewage and stormwater share one set of pipes on their way to the West Point plant in Magnolia. In a heavy rain that shared system runs full, and a side sewer that already has roots or a belly is the first place trouble shows up, often as a basement floor drain backing up. If your backups line up with the rainy season, the fix may involve both the side sewer and a backwater valve. We cover that side of it under sump pumps and backwater valves and heavy-rain drainage.
Gurgling drains or a line you keep having rodded? Let’s put a camera in it.
We will show you the footage, explain what it means, and send spot repair, lining and replacement as Good, Better and Best before anything is dug or lined.
Go deeper on side sewers
Pipe lining vs. pipe bursting
The two trenchless methods compared: what each can and cannot fix, and how we choose between them for a Seattle side sewer.
Sewer camera inspection
What the scope shows in a pre-1960 home, how to read the footage, and why we do it before any quote, including when you are buying a house.
Seattle side sewers explained
Ownership, the SPU permit, SDOT right-of-way work, and how to find your side sewer card.
Trenchless vs. dig-and-replace
When a trench is honestly the better choice, and when trenchless saves your garden and your sidewalk.
We repair and replace side sewers across Queen Anne, Magnolia, Ballard, Fremont, Wallingford, South Lake Union, Belltown and Downtown Seattle. See all service areas.
Questions homeowners ask about side sewer repair
My clay line gets rodded every year and has never backed up. Do I need to do anything?
Maybe not this year, and we will say so if the footage supports it. Annual root cutting keeps a line open, but every pass widens the joints the roots came through, so the interval tends to shorten. A camera inspection tells you whether you have a few open joints (a lining candidate when you are ready) or a break that is a matter of time. Knowing that lets you plan the repair on your schedule instead of on a holiday weekend.
Can you just replace the one bad section instead of the whole line?
Often, yes. If the camera shows a single offset joint or a short root-broken stretch and the rest of the pipe holds its shape, a spot repair is our Good tier and the right answer. We will only recommend a full-length liner or replacement when the footage shows faults along most of the run, and you will see that footage yourself before deciding.
Do I need a permit to repair or replace a side sewer in Seattle?
Yes. Seattle Public Utilities requires a Side Sewer Permit any time side sewer pipe or an outside fixture like a cleanout is repaired or replaced, whether on your property or in the right-of-way. Root removal and simple unclogging do not need one. If the work reaches the sidewalk or street, an SDOT Street Use permit is added through the same application. We file the permits and schedule the inspection as part of every tier.
Will a liner last, and how thick is the new pipe inside the old one?
A properly installed cured-in-place liner is a structural pipe of its own, designed for decades of service, not a coating. Liner thickness is specified for the pipe diameter and depth, and we camera the finished liner so you can see it cured smooth and continuous. Where the host pipe is badly deformed or bellied, we will tell you a liner is the wrong tool and steer you to bursting or a trench instead.
How long does trenchless side sewer repair take, and can I use water?
Most lining and bursting jobs are finished in one to two days on site, with water use paused for a few hours while the liner cures or the new pipe is pulled. Open-trench replacements take longer depending on depth and length. Your written quote includes the expected schedule for the tier you choose, and we tell you exactly when to hold off on laundry.
Who pays for the part of the sewer under the street?
In Seattle the homeowner’s side sewer runs all the way to the connection with the public main, so the stretch under the sidewalk and street is the owner’s responsibility too. That is one reason we locate the whole line first: a fault near the main changes the plan and the permits involved. Our side sewer guide walks through ownership and permits in plain terms.