What drives the price
This is excavation work under a permit. The cost is driven by how far the line runs, how deep it sits, and what is on top of it - a line under a driveway or mature trees costs far more than one under lawn. Restoring what was dug up is a real part of the bill and is often quoted separately.
- Length and depth of the run to the city main
- Trenchless lining versus open excavation
- What sits above the line - driveway, patio, mature trees
- Permit and city inspection requirements
- Whether surface restoration is included or quoted separately
Should you DIY this or call a professional?
Call a pro. This is permitted work tied into the municipal main, and getting it wrong means sewage under your house. Get a camera inspection first and insist on seeing the footage yourself - a full replacement is sometimes recommended where a spot repair on one collapsed section would do.
Signs you need this repair
- Multiple drains backing up at once rather than a single fixture
- Gurgling from toilets when a different fixture drains
- Sewage smell in the yard, or one patch of unusually green grass
- Repeated main line clogs within months of each other
- Slow drains throughout the whole house
How to not get overcharged
Get the camera footage and a second opinion before agreeing to a full replacement - this is the single most over-prescribed job in residential plumbing. Ask whether a spot repair on the damaged section is viable, what restoration is included, and whether the permit is in the quote. Prices vary enormously between contractors here, so three quotes is the minimum.
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Red flags to watch for
- A replacement recommendation with no camera inspection shown to you
- Refusing to give you a copy of the footage
- Quoting a whole-line replacement for one identified break
- Vague or absent restoration terms
Frequently asked questions
How much does it cost to replace a sewer line?+
Replacing a main sewer line typically runs $3,000-$12,000 depending on length and method, averaging near $6,500. Trenchless lining runs $80-$250 per foot; open trenching is cheaper per foot but destroys landscaping.
Can I replace a sewer line myself, or should I hire a professional?+
Call a pro. This is permitted work tied into the municipal main, and getting it wrong means sewage under your house. Get a camera inspection first and insist on seeing the footage yourself - a full replacement is sometimes recommended where a spot repair on one collapsed section would do.
How long does it take to replace a sewer line?+
1-3 Days, Longer If the City Permit Inspection Is Slow. Scheduling and parts availability can extend the overall timeline beyond the hands-on work itself.
What makes the price of this job go up or down?+
Length and depth of the run to the city main. Trenchless lining versus open excavation. What sits above the line - driveway, patio, mature trees. Permit and city inspection requirements. Whether surface restoration is included or quoted separately.
How do I avoid being overcharged?+
Get the camera footage and a second opinion before agreeing to a full replacement - this is the single most over-prescribed job in residential plumbing. Ask whether a spot repair on the damaged section is viable, what restoration is included, and whether the permit is in the quote. Prices vary enormously between contractors here, so three quotes is the minimum.