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Home » Uncategorized » Building owners Guide: The Cost to Waterproof a Basement

Homeowners Guide: The Cost to Waterproof a Basement

The cost to waterproof a basement: Homes $2,000 to $20,000 with an average cost of $6500. Commercial buildings $6,500 and $60,000, with most homeowners paying around $25,000.

Few problems are as stressful for a Building owner as dealing with a flooded basement. Water infiltration can lead to serious problems, including structural damage, mold growth, and poor indoor air quality. Fortunately, basement waterproofing can help prevent these issues and protect your buildings foundation.

Understanding the costs of waterproofing your basement can help you plan and budget for this essential Building/home improvement. By investing in proper waterproofing measures, you can avoid costly repairs and maintain a healthy living environment. A well-waterproofed basement can also increase the value of your building or home.

In this article, we’ll explore the average cost to waterproof a basement, the factors that influence these costs, different types of waterproofing methods, and additional considerations to keep in mind.


How Much Does It Cost to Waterproof A Basement?

The current average cost of basement waterproofing is between $2,000 and $7,000, with most homeowners paying around $5,000.

Waterproofing your basement, particularly if you reside in a flood-prone area, can save you significant time and money in the long run. When planning to waterproof your basement, it’s crucial to understand the associated costs, which can vary based on factors such as the size of your basement, the extent of existing water damage, and the type of waterproofing method used.


How Much To Waterproof A Basement On Average



French Drains


Exterior Basement Waterproofing


Interior Basement Waterproofing


Sump Pumps


Silt Plate Repair

$100-$120/linear foot

Crawl Space Encapsulation


Basement Wall Sealing

$6/square foot

Installing Drainage Tiles

$10-$25/linear foot

Vapor Barrier Installation

$2-4/square foot

Basement Floor Sealing

$6/square foot


Factors that Affect The Cost of Basement Waterproofing

Basement Size

Naturally, the size of your basement will directly impact the cost of waterproofing. To give you an idea of how much you can expect, the average cost to waterproof basements per square foot is between $3.50 and $8.

Larger basements require more materials and labor, which increases the overall cost. The cost per square foot can also vary depending on the waterproofing method. For instance, interior solutions may cost less per square foot than extensive exterior foundation waterproofing.

Waterproofing Method

Different waterproofing methods come with varying costs, and the choice of method can significantly influence the overall price. Interior waterproofing solutions like sump pumps and interior drainage systems are typically less invasive and more affordable. They usually involve installing systems to manage water that enters the basement, redirecting it away from your home or building.

Exterior waterproofing solutions involve excavating around the foundation and applying waterproof coatings or membranes. While highly effective, exterior waterproofing is more labor-intensive and costly due to the extensive excavation required. Some situations require a combination of interior and exterior methods for comprehensive protection. This approach can be more expensive but offers the best defense against water intrusion.


How much does basement waterproofing cost in labor? It depends. Labor costs can fluctuate depending on the job’s complexity and the location. Jobs requiring more complexity and specialized skills, such as extensive excavation for exterior waterproofing or repairing significant structural damage, will lead to higher labor expenses.

Additionally, labor costs vary based on the size of the crew needed and the project’s duration, with more extensive projects requiring larger teams and longer timeframes.

Geographic Location

Where you live can impact the cost of basement waterproofing significantly. Prices can vary based on local labor rates, the cost of materials, and the level of demand for waterproofing services in your area.

For example, urban areas with higher living expenses may see higher labor costs than rural areas. Additionally, regions with high rainfall or frequent flooding might have a higher demand for waterproofing services, which can increase prices. The cost of permits and local regulations can also influence the overall expense.

Existing Water Damage

If your basement already has water damage, the cost of waterproofing will be higher. Treating existing damage means repairing water damage, performing mold remediation, and addressing structural issues. Mold remediation can cost between $1,200 and $30,000, depending on the extent of the infestation. Water damage can compromise the foundation, necessitating structural repairs that can cost tens of thousands of dollars or more. Even less severe issues can add additional costs. For example, fixing leaking foundation cracks can cost between $1,400 and $4,000.

Cleaning up and drying out a water-damaged basement adds to the labor and material costs, particularly if the damage is extensive.

Home/Building Age

Older structures may have outdated construction methods and materials that make waterproofing more challenging and costly. Upgrading these materials to modern standards adds to the expense.

Older structures might have materials that are no longer used or recommended, requiring complete replacement with modern alternatives. Older foundations may have settled or shifted over time, requiring more extensive repairs before effectively implementing waterproofing. Accessing the areas needing waterproofing in older structure can be more difficult, increasing labor costs due to the additional time and effort required.


Types of Basement Waterproofing and Their Average Cost

French Drains

French drains direct water away from your building’s foundation by creating a channel for water to flow through. They consist of a trench filled with gravel or rock and a perforated pipe at the bottom to redirect surface water and groundwater away from the structure.

The cost of installing French drains typically ranges from $60 to $70 per linear foot. For a standard installation, the total price can range from $3,600 to $20,000, depending on the length and complexity of the project. The costs can be higher if there are numerous obstacles or if the installation is less than 100 feet.

Exterior Basement Waterproofing

Exterior basement waterproofing is one of the most comprehensive solutions for preventing water from entering your basement. The process includes removing soil from around the foundation walls, applying a waterproof membrane or coating to the exterior of the foundation, and installing systems such as French drains or weeping tiles to direct water away from the foundation.

Exterior work is highly effective but also the most expensive, with exterior waterproof basement costs ranging from $10,000 to $15,000. The wide range in price is due to factors such as the size of the basement, the type of materials used, and the complexity of the excavation and installation process.

Interior Basement Waterproofing

Interior basement waterproofing methods are generally less invasive and more affordable than exterior solutions. These methods focus on managing water that enters the basement and redirecting it away.

Standard interior waterproofing solutions include installing perimeter drains inside basement walls to collect water and direct it to a sump pump and/or installing a sump pump system to remove water from the basement.

The cost for interior waterproofing typically ranges from $2,000 to $7,300, depending on the size of the basement and the specific solutions implemented. Interior methods effectively manage existing water problems and are often used with exterior waterproofing for comprehensive protection.

Sump Pumps

Sump pumps are crucial for preventing basement flooding by pumping water out of the basement. They are typically installed in a sump pit at the lowest point of the basement, where water collects and is then pumped out.

The cost of installing a sump pump ranges from $600 to $3,800, depending on the pump’s capacity and the complexity of the installation. A sump pump and pit from Basement Waterproofing Solutions costs around $2,200. Higher-capacity pumps can handle more water but are more expensive. Battery backups or secondary pumps can increase costs but provide additional protection during power outages or pump failures.

Sill Plate Repair

Sill or sill plates are essential for preventing water from seeping into your basement through the foundation walls. This process typically includes identifying areas where the sill plate is damaged or compromised and installing new sill plates or repairing existing ones to ensure a watertight seal.

Repairing or replacing sill plates involves installing a barrier to keep water out and can cost between $100-$120 per linear foot.

Crawl Space Encapsulation

Crawl space encapsulation involves sealing a building’s crawl space to prevent moisture from entering and improve air quality. This process includes installing a vapor barrier on the crawl space floor and walls, sealing vents or openings, and sometimes installing a dehumidifier.

The cost of crawl space encapsulation ranges from $1,500-$15,000, depending on the size of the space and the materials used.

Basement Wall Sealing

Basement wall sealing is often used with other waterproofing techniques to provide additional protection. Wall sealing involves applying a waterproof sealant to the interior walls of the basement to prevent water from seeping through.

The cost of basement wall sealing ranges depending on the size of the basement and the type of sealant used. Epoxy injections, for example, cost around $6 per square foot.

Installing Drainage Tiles

Drainage tiles, also known as weeping tiles, are a type of drainage system particularly effective in areas with high water tables or poor soil drainage. Drainage tiles are installed around the perimeter of the basement foundation to collect and redirect water away from the home.

The cost of installing drainage tiles ranges from $60-$70 per linear foot, depending on the installation’s length and the project’s complexity.

Vapor Barrier Installation

A vapor barrier is often used with other waterproofing techniques to provide a comprehensive solution. Installing a vapor barrier involves placing a moisture-resistant material on the floors and walls of the basement or crawl space to prevent moisture from seeping in.

The cost of installing a vapor barrier ranges from $2 to $4 per square foot, depending on the size of the area and the type of material used.

Basement Floor Sealing

Basement floor sealing is typically used with wall sealing and other waterproofing techniques for maximum effectiveness. Sealing the basement floor with a waterproof coating can prevent moisture from rising through the concrete.

The cost of basement floor sealing varies depending on the size of the basement and the type of sealant used.


Additional Costs to Consider

In addition to the primary waterproofing methods, other costs, such as permits, inspections, and additional drainage solutions, must be considered. These can add several hundred to several thousand dollars to the overall cost.

Here are some additional costs to keep in mind:

  • Depending on your location, you may need permits for waterproofing work.
  • Inspections are also necessary to ensure the work meets local building codes and standards.
  • Sometimes additional drainage solutions may be necessary to ensure proper water management around your building/home. These can include redirecting water from your roof away from the foundation and adjusting the slope around your home to direct water away from the foundation.
  • In some cases, waterproofing efforts may uncover underlying foundation issues that must be addressed. Foundation repairs can be a significant additional cost
  • Investing in a warranty or maintenance plan for your waterproofing system can provide peace of mind and protect your investment. Warranties can cover repairs or replacements of failed components, while maintenance plans can ensure that your waterproofing system remains in optimal condition.
  • Waterproofing your basement can also improve your building’s overall energy efficiency. Consider adding insulation or upgrading windows and doors in your basement as part of the waterproofing project.


Affordable Basement Waterproofing Solutions in New Jersey and New York

Don’t let your basement compromise your home’s/building’s safety and integrity.

Basement Waterproofing Solutions offers affordable French drainsexterior and interior basement waterproofingsump pumps, and sill plate repair to keep your home safe and sturdy for years to come.

If you’re searching for high-quality basement waterproofing in New Jersey and New York, call us for a free inspection! Our team of experts will assess your basement, recommend the best waterproofing methods, and provide a detailed cost estimate.

Get your free estimate today!