Sewer Line Replacement Cost

The sewer line carries all of a home's wastewater to the city sewer or septic system. When it collapses, is crushed by roots or sags so badly that it backs up, it needs replacing. HomeAdvisor puts the average replacement at $3,319, with most jobs between $1,388 and $5,323.

Cost per foot by method

Angi cites an average CIPP lining project of about $9,000, which shows how quickly per-foot prices add up on a long line.

Trenchless vs. traditional digging

Trenchless methods replace or line the pipe through small access pits, so the yard, driveway or patio above stays mostly intact. Traditional digging opens a trench along the whole line. The per-foot prices overlap, so the deciding factor is often what sits on top of the pipe: digging under a driveway or patio adds restoration costs.

Restoration and other costs

Angi says a permit is needed in nearly every case.

Replace or repair?

A single cracked or root-damaged section can often be repaired instead: HomeAdvisor lists broken or cracked pipe repair at $600 to $1,050, and Angi's average sewer repair is about $2,600. See sewer line repair cost. A camera inspection is the way to tell how much of the line is damaged.

Who pays

The homeowner is usually responsible for the line from the house to the property line or city main; the city maintains the main itself. Check with your local utility before work starts, because the dividing point varies.

When the whole line needs replacing

A full replacement makes sense when a camera inspection shows damage along most of the line: many root entry points, repeated bellies, widespread cracking, or old pipe material such as clay, cast iron or Orangeburg that is failing in several places. Repeated spot repairs on a line like that often cost more over time than replacing it once.

Replacement methods

• Open trench. The traditional method: dig along the full length and lay new pipe. Most disruptive to lawns and driveways, but straightforward.
• Pipe bursting. A bursting head pulls new pipe through the old line while breaking the old pipe outward. Needs two access pits instead of a full trench.
• Pipe lining. A new pipe is formed inside the old one with a resin liner. Works when the old pipe still holds its shape.

What affects the price

• Length and depth of the line.
• What is on top: lawn, landscaping, driveway, sidewalk or a slab.
• Method chosen and the equipment needed.
• Permits and city connection fees, which vary by city.
• Restoration of concrete and landscaping after the work.

The process

1. Camera inspection and locating the line.
2. Permit and utility locates before digging.
3. Excavation or access pits.
4. Installation of new pipe, typically PVC.
5. Inspection, backfill and restoration.

Questions to ask

1. Which method do you recommend for my line, and why?
2. Does the price include restoring the driveway or yard?
3. What warranty covers the new pipe and the labor?

In Texas

Shifting clay soils, mature trees and aging clay or cast iron pipe make sewer line replacement a common project in older Texas neighborhoods. Many cities require a permit and inspection for sewer replacements, so confirm the plumber will pull it.

Choosing between trenchless methods

Pipe bursting pulls a new pipe through the old one while breaking the old pipe apart. It works well for clay, cast iron and other brittle pipes, and the new line can be the same size or slightly larger. It needs pits at each end and enough room to work.

Pipe lining installs a resin-soaked liner inside the old pipe, which hardens into a new pipe within the old one. It works when the old pipe is still in place and roughly round. It reduces the inside diameter slightly and cannot fix sags or a fully collapsed section.

Both methods avoid trenching the entire yard. The camera inspection and the pipe's condition decide which one fits.

What to expect on replacement day

The crew locates the line and marks the work area. For trenchless work, they dig access pits, often one near the house and one at the connection. For traditional work, they dig a trench along the route. The old line is removed or bypassed, the new line is installed and connected, and a camera inspection confirms the new pipe is clean and properly connected. An inspector may check the work before backfill.

Your plumbing is usually unavailable for at least part of the day.

Restoring your yard

Even trenchless jobs leave pits, and traditional excavation leaves a long trench. Ask who restores the yard, driveway and landscaping, and whether that is in the quote. Some contractors only backfill and leave grass and paving to the homeowner.

Warranties

Ask about the warranty on both the pipe material and the workmanship, including what happens if roots return or a joint fails.

Getting comparable quotes

Give every contractor the same camera video and ask them to quote the same method and the same length of pipe. Ask what pipe material they will use, whether the price includes permits, the cleanout, the city connection, yard restoration and a final camera inspection, and how long the job will take. Quotes that skip any of these are not directly comparable, even if they look cheaper at first. It also helps to ask for references from recent jobs in your area, since soil, tree cover and pipe age vary a lot between neighborhoods.

Keep the final video

The final camera video documents the new line's condition and helps with any warranty claim.

Sources

1. HomeAdvisor: How Much Does Sewer Line Replacement Cost? (updated Jun 19, 2026)
2. Angi: Sewer Line Replacement or Repair Costs (updated Jul 9, 2026)