Replacing a sump pump in an existing pit costs $800 to $1,500 in New Jersey in 2026. Call (201) 676-3099 or book a free estimate.
Replacing a sump pump in an existing pit costs $800 to $1,500 in New Jersey in 2026. A brand-new pit cut into the slab runs $1,200 to $3,000, and a battery backup adds $600 to $2,000. If the basement already flooded, pump-out and drying runs $500 to $9,000 depending on how much water and whether the space is finished. Here is what each job includes, why New Jersey basements flood, and the five-minute check that tells you if your pump is about to quit.
Do this right now if the basement is flooding
Not until the power to the basement is off. Standing water plus a live outlet, a furnace, a washer or an extension cord is how people get hurt. If you can reach the panel with dry feet on a dry floor, shut the breakers for the basement — or the main. If the panel itself is wet or you would have to wade to it, leave it and tell us when you call.
Clean water rising from the floor and the walls is groundwater and your pump is losing. Water pouring from one spot is a pipe or the water heater — shut the main water valve. Sewage or water coming up the floor drain is a sewer backup, which is a different emergency and a health hazard. Do not try to clean that one yourself.
A real person answers 24/7. Tell us how deep, whether the power is off, and whether the water is clean or dirty. We dispatch the same day, and in Bergen, Passaic, Hudson, Essex and Morris that is often within the hour. Take photos and video before anything gets moved — your insurance company will ask for them.
What does a sump pump cost in NJ in 2026?
| Job | Typical fixed-price range |
|---|---|
| Sump pump replaced in an existing pit (1/3 to 1/2 HP) | $900 – $1.5K |
| Heavy-duty 3/4 HP or cast iron pump, existing pit | $1.4K – $2.2K |
| New pit cut into the slab, pump and discharge line | $1.5K – $3K |
| Crawl space or exterior pit installation | $1.8K – $4K |
| Battery backup pump added to an existing system | $800 – $2K |
| Combination primary plus battery backup system | $1.8K – $3K |
| Water-powered backup (no battery to replace) | $600 – $1.2K |
| Dual pumps in one pit for a high-water-table house | $2K – $4K |
| Discharge line rerouted, buried and daylighted away from the house | $600 – $2.5K |
| Interior perimeter drain feeding the pit, per linear foot | $65 – $100 / ft |
| Full perimeter drain system, typical NJ basement | $3K – $12K |
| Sewage ejector pump replaced (basement bathroom) | $1.2K – $3K |
| Annual service — clean the pit, test the float, check the check valve | $495 |
What does basement flood cleanup cost?
The single biggest cost driver is how long the water sat. Mold gets going in 24 to 48 hours in a New Jersey summer. A basement dried out on day one is a pump-out and some fans. The same basement on day five is drywall removal, insulation removal, containment and a mold bill on top.
That is the whole reason a real person answers our phone at 2am. Getting fans and a dehumidifier in the room the same night is the cheapest money you will spend on the whole event.
| Situation | Typical range |
|---|---|
| Minor seepage, unfinished basement, extract and dry | $500 – $2.5K |
| Moderate flooding, unfinished basement | $1K – $4.5K |
| Moderate flooding, finished basement (drywall, flooring, contents) | $2.5K – $9K |
| Sewage backup, Category 3 water | $2K – $15K |
| Mold remediation after a delayed dry-out, small area | $500 – $1.5K |
| Mold remediation, whole basement | $2K – $8K |
Why do New Jersey basements flood?
Much of northern New Jersey sits on glacial till and clay over bedrock. Water does not soak away, it sits, and it rises against your foundation after a soaking rain. Towns along the Hackensack, Passaic, Saddle and Raritan rivers deal with this every spring. A sump pump is not a luxury here, it is plumbing.
February and March are our worst months for basement calls. Frozen ground cannot absorb meltwater, so it runs along the surface and down the foundation wall. A discharge line that froze solid picks exactly this week to fail.
New Jersey gets four to eight inch rain events. A 1/3 horsepower pump moving 2,000 gallons an hour simply cannot keep up with what comes in during one of those, especially if the power goes out. That is the case for a backup, not a bigger primary.
Half the basements we look at are flooding because of the roof. Clogged gutters, downspouts dumping at the foundation, and soil sloped back toward the house put hundreds of gallons right where you do not want them. Fixing that is cheaper than every other item on this page.
Sump pumps last about seven to ten years, and they fail on the busiest night of the year because that is the night they are asked to run continuously. A stuck float, a failed check valve, a clogged pit or a tripped GFCI all produce the same result at 3am.
The five-minute sump pump check
Do this in October and again in March. Two checks a year is the difference between a $900 planned replacement and a $6,000 finished-basement claim.
- Pour five gallons of water slowly into the pit. The pump should kick on well before the water reaches the top, run hard, and shut off cleanly. If it hums, hesitates or cycles on and off rapidly, it is done.
- Listen for the check valve. One firm thunk when the pump shuts off is right. Water running back down into the pit means the check valve is leaking and the pump is pumping the same water twice.
- Look in the pit. Gravel, silt and pebbles at the bottom will kill an impeller. Scoop it out.
- Lift the float by hand. It should move freely, not rub the side of the pit or catch on the discharge pipe.
- Walk outside and find where the discharge comes out. It should be clear, sloped, and at least ten feet from the foundation — not dumping against the wall and not buried in a leaf pile.
- Check that the pump is on a GFCI outlet that has not tripped, and that nothing else important shares the circuit.
Do I need a permit for a sump pump in New Jersey?
A straight pump swap in an existing pit generally does not need one. Cutting a new pit, running new discharge piping or adding electrical does, under the New Jersey Uniform Construction Code — usually a plumbing permit, sometimes electrical as well.
One rule that matters everywhere in the state: sump discharge cannot be tied into the sanitary sewer. Pumping groundwater into the sewer overloads the treatment plant, and towns enforce it. The discharge goes outside, away from the foundation, and not onto your neighbor's property.
Where these numbers come from
Pump and backup prices come from 2026 national cost guides including Angi and HomeGuide, adjusted to the upper half for Bergen County labor, plus New Jersey contractor price pages for waterproofing and drain systems. Flood cleanup and mold figures come from 2026 restoration company pricing covering New York, New Jersey, Pennsylvania and Connecticut and from New Jersey remediation firms in Bergen, Passaic and Morris counties. The rest is our own 2026 quotes and completed work in North Jersey.
Questions people ask next
How long does a sump pump last?
Seven to ten years for a decent submersible, less if it runs constantly or the pit fills with silt. If yours is older than seven and you have never replaced it, replace it on a dry Tuesday for $900 to $1,500 rather than on a flooded Saturday night for a lot more.
Do I really need a battery backup?
In New Jersey, the storms that flood basements are the same storms that knock out PSE&G and JCP&L. A primary pump with no power is a decoration. A battery backup at $800 to $2,000 runs for hours on its own and is the single best add-on for a finished basement.
My pump runs constantly. Is that bad?
It means the water table is at your slab or something is feeding the pit that should not be — a downspout, a leaking service line, a neighbor's regrading. Constant running burns a pump out in a year or two. Get the source diagnosed instead of just buying a bigger pump.
Does homeowners insurance cover a flooded basement?
Groundwater and surface flooding are generally excluded from a standard policy — that is what separate flood insurance is for. A sump pump failure may be covered if you carry a water backup or sump overflow endorsement. Check your declarations page today, not after it rains.
Can I install a sump pump myself?
Swapping a pump in an existing pit is within reach for a handy homeowner. Cutting a new pit, sizing the pump to the incoming water, setting the check valve correctly and routing a discharge that will not freeze in January is where DIY jobs fail. The pit you cut in the wrong corner cannot be moved.
Need sump pump installation near you?
If you searched “sump pump installation near me” anywhere in New Jersey, that's us. First Call Contracting is based in Paramus and sends its own licensed crew to all 21 counties — written price before work starts, no deposit, a real person on the phone 24/7.
Dry basement, fixed price, one crew.
We test the pump, look at where the water actually comes from, and give you an itemized price for the fix — not a sales pitch for a system you do not need. Our sump pumps page has the full detail.
Or call Alex direct: (201) 676-3099