How Much Does Basement Waterproofing Cost in Cherry Hill, NJ?

Basement waterproofing in Cherry Hill, NJ costs $3 to $10 per square foot, or $3,000 to $10,000 for a standard 1,000-square-foot basement, in 2026. Full-system projects that require exterior excavation range from $8,000 to $20,000 or more.

Total cost depends on 7 primary factors: system type, basement size, perimeter length, foundation condition, water source, labor rates, and excavation requirements. Interior systems cost less because they do not require excavation. Exterior systems cost more because they involve digging around the foundation, installing a waterproof membrane, and restoring landscaping.

Basement Waterproofing Cost in Cherry Hill: Quick Breakdown

The table below shows typical 2026 pricing for the 5 most common basement waterproofing methods in Cherry Hill.

Basement size sets the starting point for every estimate. Perimeter length, foundation condition, and labor rates then adjust the final number up or down.

Interior Basement Waterproofing Cost

Interior basement waterproofing costs $60 to $120 per linear foot of basement perimeter. This price typically includes a drainage channel installed along the interior footer, a sump pump, and a discharge line.

Linear footage, not basement size, drives most of the interior waterproofing price. A basement with a 100-linear-foot perimeter costs $6,000 to $12,000 for a full interior drainage system. A larger or L-shaped basement with 150 linear feet of perimeter costs proportionally more, since the contractor installs more drainage tile and moves more concrete.

Interior systems collect water after it enters the basement and redirect it to a sump pump. Installation requires jackhammering a narrow trench along the basement floor, which generates concrete dust and debris.

Explore our Interior Basement Waterproofing service for a full breakdown of what’s included.

Exterior Basement Waterproofing Cost

Exterior basement waterproofing costs $100 to $250 per linear foot, making it 2 to 3 times more expensive than interior systems. Excavation, foundation access, membrane installation, drainage, and landscaping restoration all add to the total.

Exterior waterproofing addresses the water source directly at the foundation wall, rather than managing water after it enters the basement. The process requires digging a trench along the entire foundation perimeter, applying a waterproof membrane, installing an exterior drain, and backfilling the trench. Landscaping, patios, decks, and walkways above the excavation line often need to be removed and rebuilt, which raises the total project cost by several thousand dollars.

A full exterior waterproofing project for a 1,000-square-foot basement with 130 linear feet of perimeter typically costs $8,000 to $15,000, excluding landscaping restoration. Compare it with our Exterior Basement Waterproofing service page.

Basement Waterproofing Cost per Linear Foot

Basement waterproofing contractors price most drainage systems by the linear foot of perimeter wall, not by square footage. Linear-foot pricing applies directly to interior perimeter drainage and French drain systems.

Interior drainage costs $60 to $120 per linear foot. Exterior waterproofing costs $100 to $250 per linear foot. A basement with a 120-linear-foot perimeter and an interior drainage rate of $80 per linear foot costs $9,600 for the drainage system alone, before adding a sump pump.

Perimeter length increases with basement size, but the relationship is not always proportional. A rectangular 1,000-square-foot basement has a shorter perimeter than an L-shaped or irregularly shaped basement of the same square footage, which lowers the linear-foot cost for the rectangular layout.

Basement Waterproofing Cost per Square Foot

Basement waterproofing costs $3 to $10 per square foot on average, according to industry cost guides including Angi and Fixr. Square-foot pricing works well for sealants and coatings, which cover the entire wall surface.

Square-foot pricing is less useful for perimeter drainage systems, such as interior drainage and French drains, since these systems follow the basement’s perimeter rather than its total floor area. A large basement with a compact, rectangular perimeter can cost less per square foot than a smaller basement with an irregular, longer perimeter. Linear-foot pricing gives a more accurate estimate for drainage-based systems.

French Drain Cost

A French drain costs $30 to $120 per linear foot, depending on whether the drain is installed on the interior or exterior of the foundation.

Interior French drains cost $60 to $120 per linear foot and require cutting into the basement floor along the perimeter wall. Exterior French drains cost $30 to $90 per linear foot and require excavating a trench outside the foundation. Both systems use perforated drainage pipe, gravel backfill, and a discharge line, and both often connect to a sump pump to move collected water away from the foundation.

A sump pump becomes necessary if the French drain’s discharge line cannot rely on gravity alone to move water away from the house. Total French drain installation cost for a 100-linear-foot perimeter ranges from $3,000 to $12,000, depending on interior or exterior placement and whether a new sump pump is included. See our French Drain Installation service for local pricing.

Sump Pump Installation Cost

Sump pump installation costs $600 to $2,500 for a complete new system, including the pump, basin, discharge pipe, and labor.

Replacing an existing sump pump in an existing pit costs $300 to $700. A new installation that requires excavating a sump pit adds $500 to $1,000 to the project. Pump horsepower, basin size, and discharge routing all affect the final price within this range.

Submersible pumps cost more than pedestal pumps but handle higher water volumes and work better in finished basements. A sump pump typically lasts 7 to 10 years before it needs replacement. Details are on our Sump Pump Installation page.

Battery Backup Sump Pump Cost

A battery backup sump pump adds $200 to $1,200 to a standard sump pump installation, depending on battery type and capacity.

A basic battery backup add-on for an existing pump costs $200 to $600. A combination primary pump and battery backup system, installed together, costs $900 to $2,500. Battery backup systems continue pumping during a power outage, which prevents flooding during severe storms that knock out electricity at the same time they raise the water table.

Foundation Crack Repair Cost

Foundation crack repair costs $350 to $900 per crack for epoxy or polyurethane injection, and it often costs less than a complete waterproofing system.

A single, non-structural crack in a poured concrete wall qualifies for localized repair rather than a full drainage system. Epoxy injection restores structural strength and works best on dry, non-leaking cracks. Polyurethane injection expands to seal active leaks and works best on wet, water-intruding cracks.

Cracks wider than 1/4 inch, horizontal cracks, or cracks paired with a bowing wall indicate structural movement, if the foundation shows signs of settling. These cases require a structural engineer’s assessment before a repair price applies, and total costs can climb to $2,500 or more. Learn more on our Foundation Crack Repair page.

What Factors Affect Basement Waterproofing Cost?

Basement waterproofing cost depends on 11 major factors: basement size, perimeter length, foundation type, water severity, groundwater pressure, accessibility, labor rates, materials, excavation requirements, concrete work, and permits.

Poured concrete foundations accept epoxy injection directly, while block foundations often need weep holes drilled into each block to drain water into the system. Water severity and groundwater pressure determine whether a homeowner needs a simple sealant or a full drainage-and-sump-pump system. Finished basements, tight crawl spaces, and hard-to-reach foundation walls add labor time and raise the total price.

Interior vs. Exterior Waterproofing Cost

Interior and exterior waterproofing differ in cost, installation method, disruption level, and typical use case.

Many Cherry Hill contractors recommend interior systems for finished basements and exterior systems for basements with severe or ongoing structural water intrusion.

What Should a Basement Waterproofing Quote Include?

A basement waterproofing quote should include 9 specific items: system type, linear footage, labor cost, materials cost, sump pump details, excavation scope, concrete work, restoration cost, and warranty terms.

An itemized quote lists the exact linear footage of drainage to be installed, rather than a flat, unexplained total. It states whether excavation, concrete cutting, or landscaping restoration falls inside or outside the quoted price, along with warranty length and any exclusions.

Homeowners in Cherry Hill benefit from comparing at least 3 itemized quotes before choosing a contractor. Request a Waterproofing Estimate to see exactly what a Cherry Hill job costs.

Basement Waterproofing Cost in Camden County & South Jersey

Basement waterproofing cost in Camden County and South Jersey generally tracks national 2026 averages of $3 to $10 per square foot, with regional variation driven by local labor rates and soil conditions.

Cherry Hill sits in a region with clay-heavy soil and a seasonally high water table, both of which increase hydrostatic pressure against foundation walls. This regional soil condition makes exterior waterproofing and sump pump systems common recommendations across South Jersey, in addition to Camden County towns with similar foundation ages and soil profiles. Cherry Hill remains our primary service area — see the full Basement Waterproofing Cherry Hill service overview for coverage details.

Final Cost Summary

Basement waterproofing in Cherry Hill costs $3,000 to $10,000 for a standard interior system, $8,000 to $20,000 for a full exterior excavation system, and $350 to $900 for a single crack repair.

Final cost depends entirely on the basement’s specific water problem and the system required to solve it. A basement with a single hairline crack needs a different, lower-cost solution than a basement with ongoing groundwater intrusion along the entire perimeter. An in-person inspection produces the most accurate pricing, since online calculators cannot account for a specific home’s foundation type, soil condition, or water source.

Frequently Asked Questions