Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Applies a regional labor-and-bid multiplier to the whole job.
Result
Lower-cost method total
$13,340
Method that wins here
Open trench
Open-trench total
$13,340
Trenchless total
$19,800
Difference between methods
$6,460
Hard-surface restoration in the trench option
$540
Effective cost per foot
$167
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How to use this
- 1Enter lateral length from house to main (ft).
- 2Enter region — Applies a regional labor-and-bid multiplier to the whole job..
- 3Enter open-trench replacement rate ($/ft).
- 4Enter trenchless (pipe burst / lining) rate ($/ft).
- 5Enter feet under driveway, patio or sidewalk (ft).
- 6Enter hard-surface restoration ($/ft).
- 7Enter line depth.
- 8Enter permits, traffic control and inspection ($).
- 9Enter trenchless access pits ($).
- 10Read your lower-cost method total on the right — it updates as you type.
- 11Hit Share to keep the scenario or send it to someone.
About this calculator
A failed sewer lateral is an emergency priced like a renovation, and the surface above it usually decides the bill. Digging a trench through lawn is the cheap version; the same run under a mature driveway, a sidewalk with a city permit, and a row of established trees can double the total once restoration is included. Trenchless pipe bursting costs more per foot but skips most of the restoration, which is why it often wins on hard surfaces and loses on open lawn. This calculator prices both methods on your run length with a regional index and adds surface restoration, permits, and the camera inspection. Worked assumption for the defaults: an 80 ft run, $145/ft open trench versus $210/ft trenchless, 30 ft under driveway restored at $18/ft, $1,200 in permits — trenching about $13,300 and trenchless about $19,800 in a national-average market.
Worked example
Using the values the calculator loads with:
Inputs
- Lateral length from house to main: 80 ft
- Region: US national average — 1.00×
- Open-trench replacement rate: 145 $/ft
- Trenchless (pipe burst / lining) rate: 210 $/ft
- Feet under driveway, patio or sidewalk: 30 ft
- Hard-surface restoration: 18 $/ft
- Line depth: Standard 3–5 ft — no surcharge
- Permits, traffic control and inspection: 1200 $
- Trenchless access pits: 1800 $
Results
- Lower-cost method total: $13,340
- Method that wins here: Open trench
- Open-trench total: $13,340
- Trenchless total: $19,800
- Difference between methods: $6,460
- Hard-surface restoration in the trench option: $540
- Effective cost per foot: $167
What each field means
Inputs
- Lateral length from house to main (ft)
- The lateral length from house to main used in the calculation, measured in ft. Starts at 80 ft so you have a working example on load. Accepted range: 10–400 ft.
- Region
- Applies a regional labor-and-bid multiplier to the whole job.
- Open-trench replacement rate ($/ft)
- The open-trench replacement rate used in the calculation, measured in $/ft. Starts at 145 $/ft so you have a working example on load. Accepted range: 50–500 $/ft.
- Trenchless (pipe burst / lining) rate ($/ft)
- The trenchless (pipe burst / lining) rate used in the calculation, measured in $/ft. Starts at 210 $/ft so you have a working example on load. Accepted range: 80–700 $/ft.
- Feet under driveway, patio or sidewalk (ft)
- The feet under driveway, patio or sidewalk used in the calculation, measured in ft. Starts at 30 ft so you have a working example on load. Accepted range: 0–300 ft.
- Hard-surface restoration ($/ft)
- The hard-surface restoration used in the calculation, measured in $/ft. Starts at 18 $/ft so you have a working example on load. Accepted range: 0–120 $/ft.
- Line depth
- Pick the option that matches your situation — the maths changes per option. Choices: Standard 3–5 ft — no surcharge, 6–8 ft — +25% excavation, Deeper than 8 ft or shoring required — +55%.
- Permits, traffic control and inspection ($)
- The permits, traffic control and inspection used in the calculation, measured in $. Starts at 1200 $ so you have a working example on load. Accepted range: 0–15000 $.
- Trenchless access pits ($)
- The trenchless access pits used in the calculation, measured in $. Starts at 1800 $ so you have a working example on load. Accepted range: 0–15000 $.
Results
- Lower-cost method total
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Method that wins here
- Returned as a plain value. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Open-trench total
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Trenchless total
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Difference between methods
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Hard-surface restoration in the trench option
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Effective cost per foot
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Is trenchless always better?
No. It needs a host pipe in bursting-capable condition and access pits at both ends, and it wins mainly when the run crosses driveways, mature trees or a finished yard. On open lawn the trench is usually cheaper.
Does homeowners insurance cover the lateral?
Standard policies generally exclude the buried lateral; some carriers sell a service-line endorsement for a modest annual premium, and some cities offer a repair program. Check before you pay out of pocket.
How do I know the line actually needs replacing?
A camera inspection is the only honest answer. Ask for the recording, not just the verdict — root intrusion and offset joints look very different from a full collapse and are sometimes spot-repairable.
Where does the regional multiplier come from?
It is a job-level index against a US national average of 1.00, built from the spread contractors quote between low-cost rural markets and the highest-cost coastal metros. Materials vary less than labor, but bids move together, so one index tracks real quotes better than splitting them. Swap in your own multiplier by picking the tier closest to two bids you already have.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Cost to Replace a Sewer Line Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/cost-to-replace-a-sewer-line-calculator
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/cost-to-replace-a-sewer-line-calculator" target="_blank" rel="noopener">Cost to Replace a Sewer Line Calculator — RevenueLab</a> (2026).</p>
Source: [Cost to Replace a Sewer Line Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/cost-to-replace-a-sewer-line-calculator) (2026).