A failing sewer line is one of the more expensive plumbing problems a Greenville homeowner can face, and the price swings widely based on what is actually wrong. The good news: most sewer jobs do not require a full replacement. This guide breaks down what each tier costs and how to know which one you need.
How sewer pricing works
Sewer pricing starts with a diagnosis, not a guess. No honest plumber can quote a real number until they see inside the line.
A camera inspection runs $175 to $275. A technician feeds a waterproof camera down the line and watches a screen to find the exact problem: a crack, a root intrusion, a collapsed section, or a belly where waste pools. The footage shows the location and the depth, which together decide your repair tier.
Always start with the camera inspection. Paying $200 up front can save you thousands by confirming you need a $2,000 spot repair instead of an $8,000 replacement, or by proving the problem is worse than a single patch can fix.
Repair vs replacement
Once the camera shows the damage, your job falls into one of two buckets.
Spot repair
A spot repair fixes one damaged section while leaving the rest of the line in place. This runs $1,850 to $2,750. It is the right call when the camera shows a single break, an isolated root intrusion, or one cracked joint, and the rest of the pipe is sound. A spot repair is faster, cheaper, and far less disruptive than replacing the whole run.
Full replacement
A full replacement swaps out the entire line from the house to the city main or septic tank. An open-trench replacement runs $3,700 to $9,200. Complex jobs, meaning deep lines, long runs, or heavy obstacles, can reach $25,000 or more.
The most reliable planning figure is about $150 per linear foot for a full replacement. Measure the rough distance from your house to the street, multiply by 150, and you have a realistic starting estimate before any plumber walks the yard.
Trenchless vs open-trench
When you do need a full replacement, you have two methods, and the difference shows up in both cost and disruption.
Open-trench replacement
Open-trench replacement means digging a continuous trench along the entire line to remove the old pipe and lay new. It runs $3,700 to $9,200. The pipe cost is only part of the bill. Tearing up and rebuilding your lawn, walkway, or driveway adds real money, and a torn-up yard can take weeks to recover.
Trenchless (cured-in-place) liner
A trenchless liner runs $4,600 to $8,300. Instead of digging the whole length, the crew accesses the line at one or two points and pulls a resin-coated liner through the existing pipe, where it cures into a new pipe inside the old one.
Trenchless usually saves $2,000 to $5,000 over open-trench because it skips most of the landscape and driveway restoration. If your line runs under a paved driveway, a mature garden, or a concrete patio, trenchless is often the cheaper option even though its sticker price looks higher. The savings come from everything you do not have to dig up and rebuild.
What drives the cost
Two homes on the same street can get very different sewer quotes. These factors explain the gap.
- Depth. The deeper the line, the more excavation, shoring, and labor each foot requires. A shallow line is much cheaper to reach than one buried several feet down.
- Length. Cost scales with distance. A short run to a nearby main is far less than a long run across a large lot, which is why the per-foot figure matters.
- Driveways and hardscape. A line under a concrete driveway, walkway, or patio means cutting, removing, and repouring that surface. This is where open-trench bills climb and where trenchless earns its keep.
- Landscaping. Mature trees, retaining walls, and established beds all add restoration cost and raise the odds that roots caused the problem in the first place.
Signs of a sewer problem
A single slow drain is usually a local clog. A sewer line problem shows up across the whole house. Watch for these signs:
- Multiple drains backing up at once. When toilets, tubs, and sinks all back up together, the blockage is in the main line, not a single fixture.
- Gurgling sounds. Air trapped by a blockage makes drains and toilets gurgle as water struggles past it.
- A sewage smell. A persistent foul odor inside or in the yard points to a cracked or leaking line.
- Soggy patches in the yard. A wet, sunken, or unusually green area over the line can mean sewage is escaping underground.
If you see more than one of these, get a camera inspection before the problem turns into a backup inside your home.
Frequently asked questions
How much does it cost to replace a sewer line in SC?
A full open-trench replacement runs $3,700 to $9,200, and the most reliable planning figure is about $150 per linear foot. Complex jobs with deep or long lines can reach $25,000 or more. A trenchless liner runs $4,600 to $8,300 and often costs less overall once you account for landscape and driveway restoration.
Is trenchless sewer repair cheaper than digging?
The sticker price of a trenchless liner can look higher, but it usually saves $2,000 to $5,000 over open-trench by avoiding most landscape and driveway restoration. If your line runs under a driveway, patio, or mature garden, trenchless is frequently the cheaper choice. On a wide-open lawn with a shallow line, open-trench can win.
Do I really need a camera inspection first?
Yes. A camera inspection runs $175 to $275 and is the only way to confirm the exact problem, its location, and its depth. That information decides whether you need a $1,850 spot repair or a full replacement, so it routinely saves far more than it costs.
What are the first signs of a sewer line problem?
The clearest signs are multiple drains backing up at the same time, gurgling from toilets and drains, and a sewage smell inside or in the yard. A soggy or unusually green patch over the line is another warning. Any combination of these means you should schedule a camera inspection promptly.
Want a number for your specific situation? Get a sewer estimate for your address, see local pricing on the Upstate cost page, or browse every plumbing job in the full cost guide.