What are the signs of a sewer line problem?
The main signs are several drains backing up at once, sewage in the lowest drain in the house, gurgling toilets, and sewage smells indoors or in the yard. Unusually soggy or green patches over the sewer line can also point to a leak.
- Backups in more than one fixture at the same time
- Sewage in a basement floor drain or lowest shower
- Gurgling when a toilet flushes or the washer drains
- Sewage smells inside or outside
- Wet, sunken or extra-green patches in the yard
How is a sewer line problem diagnosed?
Most plumbers start with a camera inspection: a waterproof camera on a cable is fed through the line to show exactly where and what the problem is. That tells you whether the line needs clearing, a spot repair or replacement.
Ask for a copy of the video or photos. It helps you compare quotes, and some contractors include it in the price of the inspection.
Can a sewer line be repaired without digging up the yard?
Often, yes. Trenchless methods such as pipe lining or pipe bursting can repair or replace many lines through one or two small access holes. Whether it suits your line depends on its condition, material and layout.
Badly collapsed lines, or ones with sharp bends or sags, may still need digging. Ask the contractor to explain why they're recommending one method over the other.
How much does sewer line repair cost?
HomeServe’s Tennessee sewer line figures put the average diagnosis at about $85 and the average repair at about $3,068. HomeServe notes prices may have risen as much as 10% since 2022.
Full replacement and trenchless work usually costs more than a spot repair. Get the price in writing, and ask what's included for restoring the yard or driveway.
Who is responsible for the sewer line?
In most cases the homeowner is responsible for the line from the house to the public sewer connection, and the utility is responsible from there on. Check with your sewer utility for the exact point on your property.
If you're not sure whether a backup is on your side, a camera inspection usually answers it.
Frequently asked questions
Is a sewer backup an emergency?
Yes, if sewage is coming into the house. Stop using water and call 865-321-8269.
Does homeowners insurance cover sewer line repair?
It depends on the policy. Many standard policies exclude wear and tear or need a separate sewer backup endorsement. Check your policy or ask your insurer.
Updated 2026-10-07