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How Much Does Sewer Line Replacement Cost? About $1,400 to $10,000

By Sharrk Team · November 2, 2026

Most residential sewer line replacements cost about $1,400 to $10,000. Angi puts the typical range at $1,388 to $5,323 (average $3,319), and HomeGuide puts a 40-foot line at $2,000 to $10,000 (average $6,000), with replacement running about $50 to $250 per linear foot.

The gap between those two guides comes down to length, depth, method and what sits on top of the pipe. A short, shallow run under grass sits at the low end; a long line under a driveway or slab can pass $10,000. HomeGuide lists a $20,000 high end.

This post covers full or partial replacement of the line from the house to the city connection. If the line just needs a clog cleared, see our guide to drain cleaning cost instead.

How much does sewer line replacement cost?

This Old House says its figures are based on Angi estimates, so treat those two rows as one data set, not two independent checks.

How much does sewer line replacement cost per foot?

Per-foot pricing is how most plumbers quote this work, because length is the biggest variable.

At those rates, a 40-foot line works out to roughly $2,000 to $10,000, which matches HomeGuide's range for that length.

Is trenchless sewer replacement cheaper than digging?

Not usually per foot. This Old House lists trenchless at $60 to $250 per foot against $50 to $200 for traditional excavation, and Angi says the per-foot price is about the same either way. Where trenchless can save money is restoration: a dug trench through a driveway, patio or landscaping has to be repaired afterward, and Angi lists yard or driveway repair at $1 to $25 per square foot and slab sections at $300 to $350 per foot.

HomeGuide breaks out the methods:

Trenchless is not always possible. A fully collapsed line, a badly sagging section or a pipe that needs rerouting may still need a trench.

What drives the cost of a sewer line replacement?

• Length. Angi notes costs rise the farther the house sits from the street connection. Every extra foot is billed at the per-foot rate.
• Depth. Angi says lines are usually 5 to 6 feet deep and can be up to 8 feet in colder climates. Deeper digs take more labor and equipment.
• What's on top. Concrete removal adds $3 to $8 per square foot (HomeGuide), and a line under a slab costs far more than one under lawn.
• Method. Trench, pipe bursting or lining, as above.
• Pipe material. Angi lists PVC at about $4.50 per foot, ABS at $6, cast iron at $50 and copper at $85.
• Camera inspection. $100 to $500 (Angi, This Old House) or $125 to $500 (HomeGuide). This is how the plumber confirms the problem before quoting.
• Permits. $30 to $500 per HomeGuide, or $100 to $1,000 per This Old House, depending on the city.
• Add-ons. HomeGuide lists a backflow preventer at $150 to $1,200 and a new cleanout at $500 to $2,000.
• Labor. Rates vary by market; HomeGuide lists $75 to $150 an hour and This Old House $150 to $500 an hour.

Who pays for which part of the sewer line?

It depends on the city, and it's worth confirming before anyone quotes the job. HomeGuide says homeowners are generally responsible for the pipe from the house to the main line, and the city handles problems in the main itself. Local rules differ on the stretch under the street:

• Los Altos, California: the owner is responsible from the home to the first joint past the property line; the city handles the section from that joint to the main.
• San Diego: the whole lateral from the building to the city main is the owner's to maintain. The city only steps in for certain blockages or collapses in the public right-of-way, and it will not dig on private property.

Tell homeowners to call their city's public works department before the job is quoted, so the estimate covers only their section.

What are the warning signs a sewer line needs replacing?

Angi, This Old House and HomeGuide list similar signs:

• Several fixtures draining slowly or clogging at once
• Water rising in the tub or shower when a toilet flushes
• Gurgling or bubbling at drains
• Sewage or rotten-egg odors
• Sewage backing up into sinks, tubs or floor drains
• Soggy patches, unusually green grass or sunken spots in the yard
• Backups that keep coming back after cleaning

Angi says frequent backups despite cleaning, extensive damage and old piping point toward replacement instead of repair. A camera inspection settles it.

What should plumbers ask on a sewer backup call?

Sewer backup calls are urgent, and the caller often doesn't know whether they need a cleaning or a new line. A short intake gets you what you need to dispatch and quote:

1. "Is sewage coming up into the house right now? Which fixtures: toilets, tubs, floor drain?"
2. "Is it one drain or several? Is it the lowest drain in the house?"
3. "Have you had this line cleared or camera-inspected before? When?"
4. "Roughly how old is the house, and do you know what the pipe is made of?"
5. "Are there big trees between the house and the street?"
6. "Does the line run under a driveway, patio or slab?"
7. "Do you own the home, and is it on city sewer or septic?"
8. "What's the service address and best callback number?"
9. "We can send a tech to clear it and run a camera so you know whether it's a clog or the pipe itself. Does [time] work?"

Set expectations without quoting a replacement over the phone: the camera inspection decides whether this is a cleaning or a replacement. For more phone wording, see our plumbing emergency call script.

How does Sharrk handle sewer backup calls?

Sharrk answers calls 24/7, asks your intake questions (which fixtures are backing up, prior cleanings, trees, whether the line runs under concrete) and books the camera inspection or service call onto Sharrk's calendar, Calendly or Cal.com, or into ServiceTitan. It can live-transfer a caller to a person when sewage is coming into the house. New leads from Angi, Thumbtack, Networx, web forms and webhooks get a reply in under 30 seconds, and Jobber clients come in as leads. Strikes (automated follow-up sequences) chase replacement quotes that went quiet, and Hunts can reach out to past customers on lists you have consent to contact. See how it works for plumbing.

Mako, the AI assistant inside Sharrk, builds your agents, follow-up and campaigns from plain English. Tell it "When someone calls about a sewer backup, ask which drains are affected and whether the line runs under the driveway, then book a camera inspection and transfer me if sewage is in the house" and it drafts the agent; you approve the changes before anything goes live.

Sharrk Free is $0 with 2,500 one-time credits to build and test agents with Mako, no card needed. Core is $99 a month ($990 a year) with 47,500 credits a month. There are no contracts or setup fees. Start free or schedule a demo.

Related on Sharrk: AI receptionist for plumbing, AI answering service, plumber after-hours rates

Sources

• Angi, [What Does Sewer Line Replacement Cost? [2026 Data]](https://www.angi.com/articles/things-know-replacing-your-sewer-line.htm), no date shown (title says 2026 data), checked November 2, 2026. Angi and HomeAdvisor are one company.
• This Old House, How Much Does Sewer Line Replacement Cost? (2026 Pricing), updated March 30, 2026, checked November 2, 2026. Cost data is based on Angi estimates.
• HomeGuide, How much does it cost to replace or repair a sewer line?, no date shown, checked November 2, 2026.
• City of Los Altos, Sewer Lateral Responsibility, no date shown, checked November 2, 2026.
• City of San Diego, Sewer Laterals: Street or Alley, no date shown, checked November 2, 2026.

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