What this work actually costs in New Jersey
Most contractors will not put a number on a page. We understand why, because every job is different and a range can be held against you. But refusing to answer leaves people guessing, and guessing is how somebody ends up with a quote they cannot judge. So here are real ranges, with the part that matters most: what moves the number.
As of August 2026 in northern New Jersey: clearing wooded land runs $4,000 to $30,000 an acre and averages around $16,000; excavation for a house runs $15,000 to over $100,000 and usually lands between $50,000 and $60,000; a sewer line is $10,000 to $35,000 while repairing one section is $3,000 to $8,000; replacing a 200 foot water service is $8,000 to $10,000; a septic system is $30,000 to $75,000 because New Jersey soil decides which of five disposal field types you get; a retaining wall is $3,000 to over $100,000 depending on height and engineering; and pulling stumps with an excavator is $300 a stump with an $800 minimum to get a machine on site.
Why a day costs what it costs
This is simpler than people make it. Everybody writing about excavation pricing points at rock, access and depth, and those are real, but they only explain why one day costs more than another. They do not explain the day rate itself, which is usually the part that surprises people.
The day rate is arithmetic. It is what has to be carried before a machine turns, and it is roughly the same arithmetic for anybody doing this work properly. It is the difference between a landscaper charging $50 to cut a lawn and an excavator charging $1,800 for the day.
| What is in the day | What that actually means |
|---|---|
| Insurance | General liability, commercial auto on every truck and trailer, workers compensation on every man. It is carried whether or not the phone rings, and on underground work the limits are not small. |
| Labor | Not just the wage. Payroll taxes, workers comp premium, training, and the hours that are real work but are not on your job: loading, travelling, fueling, and the markout call three days before anybody digs. |
| Equipment | An excavator is a several-hundred-thousand-dollar machine that is either financed or owned outright, and either way it costs money to sit still. Add tracks, buckets, teeth, hydraulic hoses, and the trailer and truck that move it. |
| Fuel | Diesel for the machine, diesel for the truck that hauled it, and the run to the site and back before anyone gets paid for anything. |
| Materials | Pipe, stone, fittings, fill, geogrid, fabric. Bought at whatever the supply house is charging that week, which is not what it was charging last year. |
| Maintenance and downtime | Machines break. A hydraulic line lets go and the day stops. That risk is real and it is priced in, because the alternative is pricing every job as though nothing ever goes wrong. |
Two useful things fall out of that list. The first is that a quote far below everybody else’s is not a bargain, it is a signal that something on the list is missing, and the item people leave off is almost always insurance. Ask for the certificate before you sign anything.
The second is that overhead is structural. A smaller, family-run outfit carries less of it than a large operation does, because there is no salaried sales force to fund and no layer between the person who quotes your job and the person running the machine on it. That is not a promise to be the cheapest number you get. It just means less of what you pay is going somewhere other than your property.
How much does it cost to clear an acre of wooded land in NJ?
$4,000 to $30,000 per acre
If you need one number: around $16,000 per acre.
What moves it:
- What is genuinely on the lot. “Wooded” covers everything from young saplings to mature hardwood, and the two are not the same job.
- Whether the material stays on the property or has to be hauled off. Haul-off is trucking, tipping and time.
- Whether a forestry mulcher runs the job and leaves the chips on site, which is usually the cheaper end.
- Whether the stumps come out. Grinding or pulling stumps is separate work from dropping what is above ground.
- Whether rough grading is part of it, because a cleared lot and a usable lot are different things.
The spread here is the widest on this page for a reason: “wooded land” is vague. Two acres that look identical from the road can be four times apart in price once somebody walks them.
How much does excavation cost for a house in NJ?
$15,000 to well over $100,000
If you need one number: usually $50,000 to $60,000.
What moves it:
- Rock. Hammering out ledge or boulders is slow, hard work and it is the single biggest swing factor.
- What is being built on: a slab, a crawlspace or a full basement are three different excavations.
- Whether the utilities are overhead or underground, because underground means more digging and more coordination.
- Whether the site is on city sewer and water, or septic and well. A septic system and a well are their own projects on top of the dig.
How much does a sewer line cost in NJ?
$10,000 to $35,000
What moves it:
- The length of the run. Sewer gets expensive the further the house sits from the main.
- Whether the street has to be opened to make the connection, which usually it does. That brings road opening permits, traffic control and restoration.
- Depth, which is set by where the main sits and by the grade the pipe has to hold.
- Access, and whether machines can reach the line or it has to be dug by hand.
Done properly there is every chance that pipe lasts 30 to 40 years or more, as long as roots do not find it. That is the argument for doing it once and doing it right.
How much does it cost to replace a water service line?
$8,000 to $10,000 for a 200 foot service
What moves it:
- The length of the run, which is why this range is quoted against a real distance rather than in the abstract. A 200 foot service is a common one around here.
- The material going in, which changes both the cost of the pipe and what the town will accept.
- How hard the digging is. Rock, ledge, wet ground and shallow bedrock all slow the trench down, and the trench is the job.
- What the line has to get under, because a driveway, a mature tree or a finished surface can turn an open cut into a bore.
Quoting this against a stated length is deliberate. A price with no distance attached is not something you can compare, and water services vary enormously in how far the house sits from the main.
How much does it cost to repair a sewer line in NJ?
$3,000 to $8,000
What moves it:
- Whether the failure is one section or the whole line. Root intrusion or a collapsed piece of PVC can be lined or dug up and repaired in one place.
- The material. A line in Orangeburg or cast iron is usually a full replacement rather than a repair, because fixing one section of a failing material buys very little.
- Access, and whether the repair is under a lawn, a driveway or a finished surface.
That range is for repairing something like root intrusion in a five foot section, and it includes the plumbing, the materials and the digging.
How much does it cost to replace a sewer lateral in NJ?
$10,000 to $20,000
What moves it:
- Depth, which is the main one. A deep lateral means a deeper, wider, more heavily shored trench for the same length of pipe.
- Length of the run from the house out to the main.
- Whether the work reaches into the street, which brings a road opening permit and restoration with it.
- Access, and what the trench has to cross to get there.
How much does directional boring cost in NJ?
$25 to $100 per foot
What moves it:
- The size of the bore, meaning the diameter of what is going in the ground.
- The difficulty, which is ground conditions, what is already down there, and how much room there is to set up.
- Setup and takedown, which is why a short bore costs more per foot than a long one.
Boring is not automatically the right answer. If open cut is genuinely available it is usually the smarter move, and we will tell you that rather than sell you the more expensive method.
How much does it cost to trench utilities in NJ per foot?
$22 to $300 per foot
What moves it:
- Terrain, which is the first question. Lawn is not the same as ledge.
- The service itself. A 50 foot water service and a 4,000 foot water main extension are not the same work priced at the same rate.
- Whether asphalt has to be cut and repaved.
- Whether anything has to be cut through, such as a hole under a foundation.
- Whether part of the run has to be bored rather than trenched.
A per-foot number with no context is close to meaningless in this trade, which is why the spread here is more than ten to one. The useful question is always what the run has to cross.
How much does rock excavation cost in North Jersey?
$4,400 per day to hammer rock, one day minimum
What moves it:
- How much rock is actually there, which nobody knows until the hammer is in it. That is why this is billed time and materials rather than as a lump sum.
- The size of the job. A bigger job gets a better rate, because the mobilization is spread across more days.
Rock is the one thing we will not quote as a fixed price, and any contractor who does is guessing. The day rate above is for hammering with a Case 160. Time and materials on rock is not a contractor hedging, it is the only honest way to price something nobody can see.
How much does it cost to fill in an old swimming pool in NJ?
around $8,000 for a typical pool
What moves it:
- The size of the pool, which sets how much fill it takes. A typical one is a few truckloads of RCA or DGA.
- Access for trucks, because fill has to get to the hole.
The pool itself has to be broken up rather than simply buried, so that water can drain through instead of collecting in a bathtub under your yard. Skipping that is how a filled pool turns into a settling, soggy patch a few years later. Whether a permit is required varies by town, so ask yours before anything starts.
How much does it cost to run electric to a detached garage in NJ?
$10,000 to $15,000
What moves it:
- The size of the service going out there, because that changes the conductor and the trench.
- The length of the trench from the panel to the garage.
- What the run has to cross on the way, particularly a driveway or a finished surface.
How much does a septic system cost in NJ?
$30,000 to $75,000
What moves it:
- The system type, which the soil decides rather than the budget. See below.
- Where the property is, and what the local health department requires.
- How much of the lot has to be excavated and replaced to build a suitable disposal field.
- Access for machines, and whether the field can go where you would want it.
The reason this range is so wide is that New Jersey does not have one kind of septic system. Which one your lot gets is determined by its soil, not by what you would prefer to spend.
How much does a retaining wall cost in NJ?
$3,000 to over $100,000
What moves it:
- Size, which means height and length together. Height drives engineering far faster than length does.
- Materials, from segmental block through natural stone to poured concrete.
- Whether the wall needs to be engineered, which depends on its height and on what it is holding back.
- What sits above it. A wall supporting a driveway, a structure or a slope is carrying a surcharge and is a different design problem.
A structural wall is not a stack of block. It needs geogrid tied back into the retained soil, properly compacted backfill in lifts, and drainage behind the face so water is not pushing on the wall. Walls that fail almost always failed on drainage or backfill, not on the block. That is where the money goes, and it is invisible once the job is finished.
How much does stump removal cost in NJ?
$300 per stump, with an $800 minimum to come to the site
What moves it:
- The number of stumps, because mobilizing the machine is most of the cost on a small job.
- Whether the hole gets backfilled and the stump hauled away, which is not included in that price.
- Access, and whether an excavator can reach the stump at all.
That is for pulling stumps with an excavator. The $800 minimum is what it costs to get a machine to your property, so one stump and two stumps cost the same.
New Jersey does not have one kind of septic system
No disposal field may be installed where the depth to a limiting zone below the existing ground surface is less than 24 inches. Beyond that, N.J.A.C. 7:9A-10.1 sets out five ways a disposal field may be installed, and which one your property gets is determined by its soil suitability class, not by what you would prefer to spend. That is the whole reason two neighbors can be forty thousand dollars apart.
| Installation | What it means |
|---|---|
| Conventional | The disposal field goes straight into the native soil, with the level of infiltration one to three feet below the existing ground surface. The cheapest outcome, and the one you get when the soil is good. |
| Soil replacement, bottom-lined | The excavation goes below the level of infiltration and is backfilled with suitable fill up to it. The field sits on top of that fill, still one to three feet below grade. Where the native soil underneath will not do the treatment on its own. |
| Soil replacement, fill-enclosed | The excavation extends at least two feet laterally beyond the field on every side, is backfilled with suitable fill, and the field is built inside that fill. More excavation and more imported fill, so more money. |
| Mounded | Fill is placed above the existing ground, the field is built inside it, and the level of infiltration ends up one to four feet above the original grade. This is the one people call a turtle mound. It is what you get when there is not enough usable depth beneath the surface. |
| Mounded soil replacement | An excavation is made below grade, filled, and then mounded above grade, with the field built in the fill. The most involved of the five, and the top of the price range. |
Source: N.J.A.C. 7:9A-10.1, disposal fields (NJ standards for individual subsurface sewage disposal systems). Your local health department administers this, not Trenton. More on septic installation.
The one we cannot put a number on
How much does drainage cost in NJ?
What decides it:
- Whether this is a couple of gutter leaders or a full storm system, which is the difference between a day and a project.
- Whether the leaders can daylight out at the street, which is by far the cheapest answer when it is available.
- Whether the township permits that connection, because it is their system and their call.
- Elevation. If the house sits lower than the road, water will not run to the street on its own and the whole design changes.
Where there is nowhere for the water to go, the answer is usually concrete seepage tanks, and those are the expensive part: $15,000 to $25,000 for the tanks alone, depending on size and where they have to go. That is why a drainage quote cannot be given over the phone.
Two things we will not quote you
A price page is only worth reading if it also says where it stops. These come up constantly alongside what we do, so here is the honest answer on each.
How much does stump grinding cost in NJ?
around $300 per stump
We pull stumps with an excavator, we do not grind them. For grinding we send people to Stump n Grind in Stillwater, and we would rather tell you that than take the work and sub it out.
- The size of the stump and how deep it has to be ground.
- Access for the grinder.
How much does an interior French drain cost?
We honestly do not know, because we do not do interior French drains. Our drainage work is outside, in the ground. We would rather say that than invent a number.
Wondering what you are allowed to do yourself rather than what it costs? Can I do that myself answers the permission questions with the rule attached.
These are our ranges in northern New Jersey as of August 2026, not a national average and not a quote. Prices move, and the only way to know what your job costs is for somebody to walk it. That part is free. If a number here is wildly different from a quote you are holding, that is worth a conversation either way, and we give a free second opinionon other contractors’ quotes.
Want a real number for your property?
Free on-site estimate anywhere we work. Call 862-268-2510 and we will come look at it.
Call 862-268-2510