The pipe from the street is yours, and it is the one nobody thinks about
Most people find out they own the water service the day it fails. This is what a failing one looks like, what replacing it costs, and who pays, written by the crew that digs them.
Replacing a residential water service line in northern New Jersey runs $8,000 to $10,000 for a 200 foot service as of August 2026, which works out to roughly $35 to $50 a foot, cheaper per foot on longer runs because mobilization is spread further. The line is almost always the homeowner’s property and the homeowner’s bill. The most reliable sign one is failing is ground that stays wet during a dry spell. New Jersey services are set at 42 inches deep on a bed of sand, and the schedule is usually driven by the 811 markout rather than by the digging.
Think yours is leaking? Call 862-268-2510 or get a free on-site estimate. We locate the leak before opening the ground, so you are not paying to dig up a guess.
What a failing water service actually looks like
A service line leak underground does not announce itself the way a burst pipe in a wall does. There is no sound, often no pressure complaint worth calling about, and nothing visible indoors. These are the signs, in the order they are usually noticed:
| Sign | What it means |
|---|---|
| Ground that stays wet in a dry spell | The most reliable sign there is. If one patch of yard stays soft while everything around it hardens off, that water is not coming from the sky. On a job in Andover the homeowner had lived with it for five months and only became certain during a drought. |
| A water bill that jumped without a reason | A service line leak runs 24 hours a day. Nobody is home to hear it and nothing shows indoors, so the bill is often the first hard evidence. |
| Pressure that has fallen off | Usually gradual, so people adapt to it without noticing. Worth ruling out at the meter first, because low pressure can also be a valve or the utility side rather than your line. |
| An area that stays green, or stays unfrozen | Grass over a leak grows better than the grass around it. In winter, a strip of ground that stays clear of snow or free of frost is telling you something is warm and wet underneath it. |
| Air or discolored water at the tap | Can point to a line drawing air through a break, particularly on an older galvanized or poly service. |
A worked example of all of this on one property, with the numbers: a 500 foot water line in Andover.
What it costs, and why per foot is the wrong question on its own
$8,000 to $10,000 for a 200 foot service. That is roughly $35 to $50 a foot, and the longer the run the cheaper the foot, because getting a crew, a machine and materials to your property costs the same whether the trench is 60 feet or 400.
Four things move it: length, which is why we quote against a stated distance; the material going in, which changes both the pipe cost and what your town will accept; how hard the digging is, since 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.
Every range we publish is on what this work costs, and the boring detail is on directional boring.
Questions people ask before they call
How much does it cost to replace a water service line in NJ?
$8,000 to $10,000 for a 200 foot service as of August 2026 in northern New Jersey. Quoting it against a stated length is deliberate, because a price with no distance attached cannot be compared and services vary enormously 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 works out near the top of that; a 500 foot service we quoted at $17,400 works out closer to $35. The reason is mobilization: getting the crew, the machine and the materials to your property costs the same whether the trench is 60 feet or 400.
How do I know if my underground water line is leaking?
The most reliable sign is ground that stays wet when it has no reason to be. If one area of the yard stays soft through a dry spell while everything around it dries out, suspect the service line. Other signs are a water bill that jumped without explanation, pressure that has gradually fallen off, grass that is greener over one strip, and in winter an area that stays clear of snow or frost.
Who is responsible for the water line from the street to the house?
Almost always the homeowner. The pipe running from the main at the street into your house is your property and your bill when it fails, which surprises people the first time. Where exactly responsibility changes hands is set by your municipality or water utility rather than by any statewide rule, so it genuinely varies town to town. Some condo and HOA communities carry it through the association, so the governing documents are worth reading before you assume.
Who is responsible for the water line before the meter?
Usually still you, and this is the part that catches people. The meter marks where billing starts, not where ownership starts. The dividing line is more often the curb stop or the main connection, and it is set locally. Ask your water utility where their responsibility ends for your address before you assume the meter is the boundary.
Should I repair the leak or replace the whole line?
Repair a line that failed for a reason, such as dig damage or one bad section. Replace one that failed because of what it is: an old line, a wrong or unrecorded material, or a pipe that was never bedded properly. Those conditions have not gone anywhere and the next failure is a matter of when. On the Andover job the spot repair was $4,750 and the full replacement was quoted at $17,400, and we did the repair the homeowner asked for while telling him plainly it would happen again.
How deep does a water service line have to be in NJ?
The standard around here is 42 inches to the pipe. We dig the trench to at least 46 so there is a bed of sand underneath, which is what keeps the pipe off sharp stone. Your water utility sets the required depth for your address, so confirm it with them, but 42 inches is the number we build to.
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, because New Jersey rules require a marked line to be exposed by hand rather than bored past blind, and a bore that meets rock and rides up. We price the open cut as a separate what-if line item before starting, so a failed bore is a plan rather than a surprise.
Do I need a plumber or an excavator to replace my water service?
Both, and that is the code rather than an upsell. The digging is excavation work; the connection is plumbing work, and N.J.A.C. 5:23-2.15 says plumbing work may not be undertaken except by someone licensed to perform it, with one exception for a single-family homeowner on their own dwelling. We bring in a licensed plumber, work in support of them, and because the excavation is usually the larger cost we invoice you and pay the plumber directly.
How long does a water service replacement take?
Most residential services are a one to two day job once the markout is back. The part that sets the schedule is not the digging, it is New Jersey's One Call requirement: notice not less than three business days and not more than 10 before excavation, and business days exclude weekends and holidays. A Monday call means Friday. On a genuine emergency, such as a line that cannot be shut off or a building left without water, there is a separate emergency route.
Ranges are ours in northern New Jersey as of August 2026 and are not a quote. Rules last checked 2026-08-23. More on the wider service on sewer and water line, and on materials in copper versus polyethylene.
Wet patch that will not dry out?
Call 862-268-2510. We locate the leak first, then tell you honestly whether it is a repair or a replacement.
Call 862-268-2510