Why is waterproofing in Cherry Hill cheaper than in Philadelphia?

HomeAdvisor’s Cherry Hill average ($3,716) is lower than its Philadelphia average ($5,268). Easier access, fewer stone foundations and simpler hauling can all play a role, but every house is different, so compare written quotes.

How much does a battery backup sump pump add?

It depends on the system. This Old House puts complete sump pump installations at $500 to $4,000; a backup adds to the pump cost. In South Jersey, where groundwater is high, a backup is one of the most worthwhile add-ons.

Is crawl space encapsulation worth the money in South Jersey?

If your crawl space is damp, smells musty or has standing water, usually yes. Fix standing water with drainage first. This Old House puts the average at about $5,500.

It depends on the work and your town. New Jersey’s Uniform Construction Code applies statewide, and your municipal construction office decides which permits are needed – electrical work for a new pump circuit often requires one.

Basement Waterproofing Cost in South Jersey (2026)

The short answer

HomeAdvisor’s cost page for Cherry Hill lists an average of $3,716 for foundation or basement waterproofing. Its pages for Sewell (Gloucester County) and Mount Holly (Burlington County) list an average of $5,268, with projects ranging from about $1,462 at the low end to $11,500 at the high end. National figures are similar: Fixr puts most projects between $3,000 and $10,000 (about $5,000 on average), and Angi reports $2,300 to $7,575 with a national average of $4,920.

For crawl spaces – very common in South Jersey – This Old House puts encapsulation at about $5,500 on average, with most projects between $1,500 and $15,000, or roughly $3 to $7 per square foot for basic work.

All figures are published cost data for orientation, checked in October 2026. They are not quotes. Only a contractor who has seen your home can give you a price.

Typical costs by type of work

Item	Typical range	Source
Foundation or basement waterproofing, Cherry Hill	average $3,716	HomeAdvisor
Foundation or basement waterproofing, Sewell and Mount Holly	average $5,268; $1,462–$11,500 low to high	HomeAdvisor
Basement waterproofing, national	$3,000–$10,000, about $5,000 on average	Fixr, 2026
Wet basement waterproofing, national	$2,300–$7,575, average $4,920	Angi
Crawl space encapsulation	$1,500–$15,000, about $5,500 on average ($3–$7 per sq ft basic)	This Old House, 2026
Sump pump installation	$500–$4,000, about $1,400 on average	This Old House, 2026
Epoxy crack injection	$350–$500 per crack	Fixr

Why South Jersey prices look different

South Jersey basements leak for different reasons than basements in Philadelphia or North Jersey, and that changes what you pay for.

The water table does the damage. South Jersey sits on the Atlantic Coastal Plain. In the Pinelands, the Pinelands Commission notes that the water table of the Cohansey aquifer is generally less than 10 feet below the surface and often reaches it in low areas. Homes near the Rancocas, Pennsauken, Big Timber and Cooper River watersheds share that shallow groundwater. When it rises in a wet spring, the basement floor can sit below it. The money goes into collecting and pumping water reliably: drain lines, a properly sized sump pit and pump, and a backup.
Sump pumps work hard. A pump that runs for weeks in spring wears out faster than one that runs a few times a year. Budget for a quality pump, a battery backup and an alarm, and for replacing the pump sooner than you would elsewhere.
Lots of crawl spaces. Many newer homes and additions have crawl spaces instead of full basements. Encapsulation is priced mainly by square footage and by how much water has to be managed underneath.
Mid-century block foundations. The DVRPC housing profile puts the median year built in Camden County at 1960, with more than 30% of homes built between 1960 and 1979. Many of those homes have block foundations whose original drain tile and sump pits are now 50 to 65 years old.
Less hauling, easier access. Compared with Philadelphia rowhomes, most South Jersey homes have yards and side access, which can make excavation, discharge routing and debris removal simpler.

What drives the price of your project

Length of wall that needs drainage – the biggest single factor for an interior system.
Number of pumps and backups – homes with very high groundwater sometimes need two pumps or a larger basin.
Crawl space size and condition – standing water, wet insulation that has to come out, or damaged wood add cost.
Finished basements – walls and flooring that have to be removed and replaced.
Electrical work for a dedicated pump circuit, and any permits your town requires.
Structural repairs such as bowing walls, which are priced separately.

Spend money where it helps

Before paying for a full system, rule out the cheap causes. Clean gutters, extend downspouts, and make sure the ground slopes away from the house – building codes call for at least 6 inches of fall within the first 10 feet (IRC R401.3). If water only shows up in one corner after storms, that is often enough.

If your pump runs constantly even in dry weather, read sump pump keeps running: sometimes a failed check valve or a short discharge line is the real problem. For crawl spaces, our guide is crawl space encapsulation worth it? explains when it pays off.

Running costs to plan for

With a high water table, a waterproofing system is not a one-time purchase. Plan for:

Pump replacement. A pump that cycles for weeks every spring wears out sooner than one that rarely runs. Ask the contractor what lifespan to expect under your conditions and what a replacement costs.
Backup batteries. Battery backup pumps rely on a battery that loses capacity over time and needs periodic replacement. Test the backup at the start of every spring and hurricane season.
Electricity. Sump pumps and crawl space dehumidifiers run on house power; a dehumidifier in a sealed crawl space may run much of the summer.
Annual check-ups. Cleaning the pit, testing the float and check valve and making sure the discharge line is clear take little time and catch most failures before a storm does.

Ask whether the contractor offers maintenance visits and what is covered by the warranty, because some warranties require periodic service.

How to compare quotes

Ask each contractor where they think the water comes from and why.
Get the linear feet of drain, the pump brand and model, the backup type and the discharge location in writing.
Ask how they sized the pump and the pit for your water table, and what happens if the main pump fails while you are away.
For crawl spaces: the vapor barrier thickness, whether seams are sealed and the barrier runs up the walls, and how the space will be dried (dehumidifier, conditioned air or exhaust).
Ask what the warranty covers, for how long, and whether it transfers if you sell.
Check the contractor’s New Jersey registration: home improvement contractors must register with the Division of Consumer Affairs, and the number (starting with 13VH) has to appear on contracts and ads.
Ask whether permits from your municipal construction office are included.

Local pages

See our pages for South Jersey, Trenton & Mercer County and Central Jersey, or compare with costs in Philadelphia.

Basement waterproofing cost in South Jersey (2026 guide)