How much does waterproofing cost?

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Price guide

$250 - $4,118







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Moisture is an annoying, year-round problem, and it can heavily damage your basement.

Don’t worry. You can protect your basement or cellar from moisture through waterproofing. These rooms tend to be colder and damper than other parts of your home because they are below the ground.  

In the U.S., the average waterproofing cost per square foot is $3 to $10. Minor fixes cost as low as $600, but extensive ones go as high as $10,000.You’ll not only protect your foundation from flooding but also have additional storage or functional space in your home. This guide will discuss how much it costs to waterproof your basement or foundation.

National average cost


Minimum cost


Maximum cost


Average range

$1,920 to $6,320

Major foundation repair

$2,000 to $10,000

a man waterproofing a basement's flooring

What factors affect waterproofing costs?

Prep or structural work

Before the actual waterproofing process, you need to examine or survey the basement. Some waterproofing specialists will do it for free or include it in the service package.

The existing wall and floor construction also determine the waterproofing products suitable for the basement.

The shape of your basement

Most basements are rectangular, but some awkward room structures have special requirements, thus increasing the overall cost of waterproofing. The digging process is simpler and cheaper if the basement is open to one side.

Vaulted, pitched, or arched ceilings cost more waterproof than flat ones because they require meticulous work.

The purpose of your basement

Suppose you want to make it a bedroom or busy space. In that case, you need to consider additional costs to make it safe or habitable. For instance, you must comply with other building regulations affecting the contractor's waterproofing method. 

A contractor will waterproof your basement using a cavity drain membrane system (including a sump and pump) if you want a functional room. Do you only need to keep the basement dry? In that case, the contractor will use a cementitious tanking system, which costs less.

Waterproofing membrane

A waterproofing membrane is a thin layer of material protecting the walls or floors of your basement from water or moisture. The quality of the waterproofing membrane also affects the project's overall cost.

Time requirements

The project's complexity can increase the contractor's labor costs, thus affecting the total price.


Some areas in the USA have higher costs of living. In New York, you might pay more than usual. If your contractor needs to travel outside their standard designated area, expect to pay for their transportation. Busier regions also have high parking fees.

Waterproofing price list

Getting into specific details helps you compare prices and evaluate your budget. Here's a list of typical waterproofing costs:

According to requirements

Basement service type 

Average cost


$3 to $10 per square foot


$500 to $1,000

Crack repair

$250 to $800

Major foundation repair

$2,000 to $10,000

Downspout replacement

$3 to $40


$3 to $6


$1,500 to $4,250

Cementitious waterproofing

$5.25 per square foot 

Liquid waterproofing membrane

$3.34 to $5.76 per square foot

Sheet membrane

$3.35 to $6.52 per square foot

Bentonite clay 

$3.53 per square foot

Weeping tile

$2,500 to $15,000

Concrete waterproofing and foundation

$3.53 and $5.25

According to area


Average cost

Portland, Oregon

$3 to $10


$800 to $10,000


$850 to $7,500

New Orleans

$600 to $12,800

Raleigh, North Carolina

$850 to $7,500

Newark, New Jersey

$1,500 to $12,000


$1,400 to $17,000


$800 to $8,000


$1,500 to $13,000


$875 to $20,000

a man attaching waterproof tape to a basement wall

Other issues

If you need a more accurate quotation from your contractor, relay as much information as possible. It helps your contractor determine all the necessary methods and materials. Here’s a list of things to check:

  • Water pipe leaks
  • Cracked foundations
  • Improperly graded slopes around the house
  • Poorly designed window wells

What are my options for waterproofing?

Stop severe problems in your basement by using quality products or combining solutions.


For minor moisture problems, buying or renting a dehumidifier might help.

Waterproofing Products

You can ask your specialist about using waterproof paint, sealant, or other products on the interior of your basement to stop moisture from penetrating walls. Waterproof paint costs $20 to $200 per can.

Gutters and Downpipes

Make sure your downpipes and gutters are functional. They direct all of the water from your roof to the basement. Installing new ones cost $550 to $1,350, depending on the size of your home.

Window Well Drains

Improperly designed window wells also cause basement dampness. So replacing them can help solve your problem. This can cost between $500 and $2,000.

Waterproofing quotes from Taskers

Relative to the size of the basement and its current condition, waterproofing tasks from Taskers can cost only $50 to $600. You can get a more accurate quotation. Just reach out to a Tasker and provide the details of your waterproofing requirements. 

Overall, basement renovation doesn't have to be problematic. With a Tasker, you can save time and complete your waterproofing project nicely. Post a task and connect with a reliable Tasker in minutes!

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