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Sewer Line Replacement Cost Calculator

Replacing a sewer lateral costs $50–$250 per linear foot installed — $50–$200 to dig it out, $60–$200 to burst a new pipe through, $90–$250 to line the old one. The per-foot price is not what decides the bill — how much of your yard or driveway gets opened up is.

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2026 national range

$50–$250/ linear foot

Replacement of a residential sewer lateral — the privately-owned pipe from the house to the public main — priced per linear foot installed. The per-foot rate covers pipe, labour and the excavation each method requires; surface restoration, permits and camera inspection are costed separately because both cited sources list them as separate line items. National figures for 2026.

Open trench (traditional dig)$50–$200
Trenchless — pipe bursting$60–$200
Trenchless — CIPP lining$90–$250

Educational calculators — always consult a licensed professional before making financial decisions.

Your sewer line

01Run length

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15150

02Replacement method

$50–$200 per linear foot. Cheapest per foot and the only option when the old pipe has collapsed or the line needs re-routing — but it opens the full length of the run, so restoration scales with the whole job.

03Surface

$4.50–$12 per square foot to backfill, regrade and reseed or re-turf.

04Depth

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312

05Permit

Include a plumbing / excavation permit

06Camera inspection

Include a sewer camera inspection

Total — Open trench (traditional dig)

$3,983 – $9,783

50 ft run · 100 sq ft of surface opened

Cost per linear foot$67 – $142

Surface restoration$450 – $1,200

On this run, open trench (traditional dig) is also the cheapest of the three methods. Over 50 ft of lawn / soft landscaping the restoration difference is not enough to overturn its per-foot price.

All three methods, same run

Method	Per ft	Surface opened	Total
Open trench (traditional dig)	$67–$142	100 sq ft	$3,983–$9,783
Trenchless — pipe bursting	$60–$200	32 sq ft	$3,344–$11,884
Trenchless — CIPP lining	$90–$250	32 sq ft	$4,844–$14,384

Where the money goes

Where Your Money Goes

Pipe replacement76%

$3,333 – $7,083

Restoring lawn / soft landscaping12%

$450 – $1,200

Permit8%

$100 – $1,000

Camera inspection4%

$100 – $500

Pipe replacement$3,333 – $7,083

Restoring lawn / soft landscaping$450 – $1,200

Permit$100 – $1,000

Camera inspection$100 – $500

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Why the cheapest method per foot is often not the cheapest job

Every published rate says the same thing: digging is the cheapest way to buy a foot of new sewer pipe. Open-trench replacement runs $50–$200 per foot against $60–$200 for pipe bursting and $90–$250 for CIPP lining. If the per-foot rate were the whole story, nobody would ever pay for trenchless.

The per-foot rate is not the whole story because it buys pipe, and the second half of the bill buys surface. An open trench opens roughly two feet of ground along the entire run — 160 square feet on an 80-foot lateral. Both trenchless methods work from an access pit at each end and disturb nothing in between, so they open roughly 32 square feet whether the run is 30 feet or 130.

Multiply those two areas by what it costs to put the surface back — $4.50–$12 per square foot for lawn, $1–$25 for a concrete driveway — and the ranking can invert. A short run across grass is almost always cheapest dug. A long run under a driveway frequently is not. That inversion is the single decision this page exists to help you make, which is why the calculator prices all three methods on your run rather than only the one you picked.

The three methods, and when each is the only option

Method	Per linear ft	Ruled out when
Open trench	$50–$200	Rarely ruled out on technical grounds — it is the fallback when the other two cannot be used. Ruled out in practice by what is on top of the run: mature trees, a finished patio, a shared driveway.
Pipe bursting	$60–$200	The old pipe has to be burstable and the path has to be straight enough to pull through. Sharp bends, and other utilities running close alongside the lateral, can rule it out.
CIPP lining	$90–$250	Needs a structurally continuous host pipe to line. A collapsed section, a badly offset joint, or a line that has to be re-routed cannot be lined — and a camera inspection is what tells you which case you are in.

Note the order of operations that implies: get the camera inspection first. It costs $100–$500 and it is the step that decides whether the cheaper trenchless option is even available to you. Quoting the job before scoping it is how people end up paying for a lining that has to be abandoned mid-cure.

What this calculator assumes, stated plainly

A two-foot trench width and two 4×4 ft access pits. Neither cited source publishes a trench width or a pit size, so these are this calculator's own geometric assumptions, used only to turn a length of pipe into an area of surface. Nothing else depends on them.
Depth positions the open-trench estimate inside its published band — it does not scale it. The sources publish one open-trench range covering every depth and no depth multiplier. Rather than invent one, a shallow run is quoted from the lower half of the published range and a deep run from the upper half. The estimate never leaves the range two sources agree on.
The whole run is priced to you. Some sewer authorities own part of the lateral. If yours does, your share is lower than the figure here.
One surface type. If your run crosses both lawn and driveway, pick the more expensive surface — it will dominate the restoration line — and treat the result as the upper end.
Not modelled: re-routing the line, traffic control and street-cut fees where the work reaches the public right of way, and rock excavation. Each is a genuine cost that neither source prices in a form that can be applied to a specific run, so none is guessed at here.

Related calculators

If the problem turns out to be a blockage or a single failed section rather than the whole lateral, price it on the plumbing repair cost calculator instead — repairs are priced by the job, not by the foot. If the driveway has to come up either way, the basement finishing cost calculator covers the below-grade work people most often bundle with a lateral replacement while the ground is already open.

And if the driveway has to be opened, the question of whether to patch it or repave the whole surface usually comes up in the same conversation — a trench patch is visible and settles differently from the slab around it. The driveway paving & sealing cost calculator prices asphalt and concrete per square foot so you can weigh a full repave against the restoration figure above.

And if the run to the main is long enough that the figure above has stopped looking sensible, the honest comparison is not a cheaper trench — it is not connecting at all. The septic system cost calculator prices an on-site system by what the ground will actually take, which is the direct alternative to a long lateral and is frequently the cheaper one.

By RealCost Editorial TeamReviewed by RealCost Editorial TeamLast updated September 7, 2026 with September 2026 data

Method changes more than the per-foot rate — it changes how much ground gets opened. Open-trench digs the whole run at $50–$200 a linear foot; trenchless pipe bursting ($60–$200/ft) or CIPP lining ($90–$250/ft) work from two roughly 4×4 ft access pits instead, so their restoration cost stays flat no matter how long the run is. Under a driveway, that flat restoration cost is what can make trenchless the cheaper total even at a higher per-foot rate.

Why the cheaper per-foot method isn't always the cheaper job

This calculator prices restoration by the square foot of surface actually disturbed, not by the length of pipe. Open-trench disturbs the full run at 2 ft wide, priced from This Old House's $50–$200/ft traditional-excavation figure; trenchless disturbs two fixed access pits — capped so trenchless can never claim to open less ground than digging the whole trench would — using HomeAdvisor's split between pipe bursting and CIPP lining. On a lawn ($4.50–$12/sq ft to restore) that gap rarely decides anything. Under a concrete driveway ($1–$25/sq ft), restoring a long open trench can outweigh trenchless's higher per-foot pipe rate entirely — which is the comparison this calculator exists to show, not just the per-foot numbers on their own.

Methodology

Per-foot rates by method and the restoration, permit and camera-inspection figures are the literal constants in this calculator's cost dataset (src/data/costs/sewer-line-replacement.ts), sourced to This Old House and HomeAdvisor. Trench width (2 ft) and access-pit area (32 sq ft) are stated planning assumptions the dataset discloses rather than published figures. No figure is estimated beyond what the dataset already states.

Sources

This Old House — How Much Does a Sewer Line Replacement Cost? — accessed 2026-08-30
HomeAdvisor — How Much Does It Cost to Replace or Repair a Sewer Line? — accessed 2026-08-30

Frequently asked questions

How much does it cost to replace a sewer line?

Sewer lateral replacement costs $50–$250 per linear foot installed, before surface restoration and permits. Method sets the rate: open-trench digging runs $50–$200 per foot, trenchless pipe bursting $60–$200, and CIPP lining $90–$250. This Old House puts the national average whole-project cost at $3,320 with a typical range of $1,390–$5,320; HomeAdvisor reports $3,319 and $1,388–$5,323 on the same work.

Is trenchless sewer replacement cheaper than digging?

Not per foot — trenchless costs more per foot than open-trench digging on every published rate. It wins on restoration. Open-trench opens the full length of the run, so the surface you have to put back grows with the job; both trenchless methods work from two access pits of roughly 32 square feet no matter how long the pipe is. On a short run across a lawn, digging is usually cheaper overall. On a long run under a concrete driveway, the restoration difference frequently more than covers the trenchless premium.

What is the difference between pipe bursting and CIPP lining?

Pipe bursting pulls a new pipe through the old one, splitting the old pipe outward as it goes, so you end up with a genuinely new pipe and can increase the diameter. CIPP lining pulls a resin-soaked sleeve through the existing pipe and cures it in place, forming a new pipe inside the old one, which slightly reduces the internal diameter. Bursting costs $60–$200 per linear foot and lining $90–$250. Lining needs the existing pipe to still be structurally continuous — a collapsed or badly offset line cannot be lined, and that is what a camera inspection is for.

Who pays for the sewer lateral — the homeowner or the city?

It depends on your municipality, and this is the one question worth answering before you accept any quote. Some sewer authorities make the property owner responsible for the lateral all the way to the connection at the public main, including the section under the sidewalk and street; others take ownership at the property line. That boundary decides who pays for the most expensive part of the run — the part under pavement — so ask your local sewer authority where their responsibility begins. This calculator prices the whole run from house to main and assumes no municipal contribution, so if your authority does own part of it, your share will be lower than the figure shown.

Does replacing a sewer line need a permit?

Nearly always. Sewer lateral replacement is permitted and inspected work in almost every jurisdiction, and the inspection is what certifies the connection to the main. Budget $100–$1,000 for the permit; a licensed plumber normally pulls it and passes the cost through. If a quote makes no mention of a permit, ask before signing — an unpermitted lateral becomes a problem at resale.

Methodology & sources

The cost figures on this page are generated from a single, sourced cost-data file (Replacement of a residential sewer lateral — the privately-owned pipe from the house to the public main — priced per linear foot installed. The per-foot rate covers pipe, labour and the excavation each method requires; surface restoration, permits and camera inspection are costed separately because both cited sources list them as separate line items. National figures for 2026.). Method sets the per-foot rate and, more importantly, sets how much of your yard or driveway has to be dug up and put back. Open-trench opens the whole run; both trenchless methods work from two access pits. That difference is why the cheapest per-foot method is not always the cheapest project. This Old House puts the national average sewer line replacement at $3,320 with a typical range of $1,390-$5,320; HomeAdvisor puts it at $3,319 with a range of $1,388-$5,323. Last verified August 2026.

This Old House — How Much Does a Sewer Line Replacement Cost? (page updated 30 Mar 2026) — retrieved 2026-08-30
HomeAdvisor — How Much Does It Cost to Replace or Repair a Sewer Line? (page updated 19 Jun 2026) — retrieved 2026-08-30

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