What replacing a water service line costs

$8,000 to $10,000 for a 200 foot service in northern New Jersey. Per foot it is roughly $35 to $50, and the longer the run, the less each foot costs.

Call 862-268-2510 Get an estimate

In northern New Jersey, replacing a residential water service line runs $8,000 to $10,000 for a 200 foot service as of August 2026. That is roughly $35 to $50 a foot, and the longer the run, the cheaper each foot. A 500 foot service we quoted at $17,400. A repair costs less than replacing the line, but only when the line failed for a reason that will not come back.

The numbers

Job	Figure	What it covers
A 200 foot service	$8,000 to $10,000	Full replacement from the main at the street to the house, quoted against a stated length. This is the common residential size around here.
Per foot	Roughly $35 to $50	The longer the run, the cheaper each foot. Getting a crew, a machine and materials to the property costs the same whether the trench is 60 feet or 400.
A 500 foot service	$17,400	A real quote for a long run in Andover, which works out to about $35 a foot. It is the example to hold a long service against.
Spot repair	$4,750	One section repaired on the same Andover job instead of the whole line. Enough when the line failed for a reason that will not come back. Not enough when the line itself is the problem.

Our ranges in northern New Jersey as of August 2026. Not a quote for your property. The length of your line and what it has to get under are what move it most, and that is what the estimate visit is for.

What moves the price

Four things set the number. Length comes first, which is why every quote is written against a stated distance. Material changes both the cost of the pipe and what your town will accept. How hard the digging is matters too: rock, ledge and wet ground all slow the trench, and the trench is the job. And what the line has to get under, because a driveway or a mature tree can turn an open cut into a bore.

Materials, and how the old line is replaced, are covered in copper versus polyethylene and pipe bursting, pulling in place, or open trench.

Repair or replace

The cheaper job is only the right job when the cause is one-off. Dig damage or one bad section is a repair. An old line, a wrong or unrecorded material, or a pipe that was never bedded properly is a replacement, because those conditions have not gone anywhere and the next failure is a matter of when. The Andover job shows both sides: a $4,750 spot repair, and a $17,400 quote for the full line. The worked example is on a 500 foot water line in Andover.

Boring or open cut

Most driveways can be crossed by boring rather than digging them up, and that is usually the better call. An open cut is what you get when a utility sits in the path, because the line has to be exposed by hand rather than bored past blind, or when a bore runs into rock. Either way, the open cut is priced as its own line before we start, so the cost of a failed bore is known up front. More on the method is on directional boring.

Common questions

How much does it cost to replace a water service line in NJ?

$8,000 to $10,000 for a 200 foot service in northern New Jersey, as of August 2026. Quoting against a stated length is deliberate. A price with no distance attached cannot be compared, and services vary a lot in how far the house sits from the main.

What does water line replacement cost per foot?

Roughly $35 to $50 a foot in northern New Jersey, and the longer the run, the cheaper the foot. A 200 foot service at $8,000 to $10,000 lands near the top of that range. A 500 foot service we quoted at $17,400 works out to about $35 a foot. The reason is mobilization: the crew, the machine and the materials cost the same to get to the property whatever the length.

Should I repair the water line or replace the whole thing?

Repair a line that failed for a reason, such as dig damage or one bad section. Replace a line that failed because of what it is: an old line, a wrong or unrecorded material, or a pipe that was never bedded properly. On the Andover job the spot repair was $4,750 and the full replacement was quoted at $17,400. The homeowner asked for the repair, and we did it while telling him plainly it would happen again.

Can you replace a water line without digging up my driveway?

Often, by boring underneath it. A pneumatic missile shoots 45 to 48 feet in one pass, which covers most driveways, and a directional drill reaches further. Two things force an open cut: an existing utility in the path, and a bore that meets rock and rides up. We price the open cut as a separate what-if line item before we start, so a failed bore is a plan rather than a surprise.

Do I need a plumber as well as an excavator?

Both. The digging is excavation work and the connection is plumbing work, and New Jersey requires a licensed plumber for the plumbing, with one exception for a homeowner on their own dwelling. We bring in a licensed plumber and work in support of them. Because the excavation is usually the larger cost, we invoice you for it and pay the plumber directly.

Where to go next

The signs that point to a failing service, and who to call to shut the water off while you decide, are on water service line replacement in NJ. Every range on this page is also listed with the rest of our prices on what this work costs.

These are our ranges in northern New Jersey as of August 2026. They are not a quote for your property. Prices move, and the only way to know what your line costs is for somebody to walk it.

How it works