Plumbing · Materials and methods · Updated November 2026
Trenchless Sewer Repair vs. Traditional Excavation
"Trenchless" sewer repair replaces or lines the old pipe without digging a trench along its whole length. It usually still needs one or two access pits, and it does not work for every pipe.
The methods
| Method | How it works | Typical cost per linear ft. |
|---|---|---|
| Traditional excavation | Dig a trench, remove the old pipe, lay new pipe | $60–$250, plus restoration |
| Pipe lining (CIPP) | A resin-soaked liner is pulled into the old pipe and cured, forming a pipe within a pipe | $90–$250 |
| Pipe bursting | A head breaks the old pipe outward while pulling new pipe behind it | $60–$200 |
From HomeAdvisor's sewer line cost guide.
What trenchless avoids, and what it does not
- Avoids: tearing up a long stretch of lawn, driveway or landscaping.
- Does not avoid: access pits at one or both ends, or digging at a collapsed section.
- Lining reduces pipe diameter slightly, which is usually fine but worth asking about.
- Will not fix a sag (belly) in the line; the liner follows the existing shape.
When traditional excavation is the better choice
- The pipe has collapsed or has severe sags.
- The line is shallow and runs under open lawn, so restoration is cheap.
- Pipe slope or route needs to change.
Restoration (landscaping, driveway or patio repair) runs about $1–$25 per sq. ft., which is often where trenchless saves money. Ask both kinds of contractor to quote the same camera findings. See sewer line repair vs. replacement.
Sources
- HomeAdvisor: Sewer line replacement cost, accessed November 2026
Cost figures are national ranges from the sources listed above and in our plumbing cost guide, not a quote from FixFinch or any contractor. Calls connect you with an independent service provider in our network. FixFinch is not a contractor and does not perform the work.