Get matched with the best Basement Waterproofing pros in Long Island, NY

Find waterproofing experts near you. Get free quotes for interior drains, sump pumps, and exterior sealing.

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Rivertown General Contracting, LLC

★ ★ ★ ★ ★ 4.7 (14 reviews)
Irvington, NY 10533
11 projects

Rivertown General Contracting, LLC, led by Jerry Carrafiello, prioritizes building lasting relationships alongside quality craftsmanship. With extensive experience in Westchester and Fairfield Countie...

Gee Bee And Sons LLC

★ ★ ★ ★ ★ 4.7 (13 reviews)
Garden City, NY
4 projects

Gee Bee and Sons LLC is a comprehensive NYC construction firm specializing in the renovation, restoration, and rehabilitation of residential, commercial, industrial, and institutional buildings. With...

Jfcorp

★ ★ ★ ★ ★ 4.7 (13 reviews)
West Babylon, NY 11704
1 project

JF Corp is a licensed and insured general contractor serving Long Island, NY, for over 25 years. We specialize in high-quality residential and commercial construction, including renovations, roofing,...

Done Right Renovations LLC.

★ ★ ★ ★ ★ 4.7 (12 reviews)
Queens, NY 11419
11 projects

Done Right Renovations LLC has been delivering quality construction, remodeling, and maintenance services since 2020. Our expertise in design ensures comfortable, durable, and aesthetically pleasing i...

Royale Renovations

★ ★ ★ ★ ★ 4.6 (12 reviews)
Bronx, NY 10452
10 projects

Royale Renovations is dedicated to delivering excellence in every project. With over a decade of experience, we offer professional expertise and personalized service. We uphold the highest industry st...

ANT Contracting Inc.

★ ★ ★ ★ ★ 4.6 (11 reviews)
Brooklyn, NY 11237
11 projects

ANT Contracting Inc., led by Tamas Tiszold, specializes in residential renovations and high-quality custom millwork. Known for European craftsmanship, we provide personalized attention to every client...

Cascella & Sons Construction Corp.

★ ★ ★ ★ ★ 4.7 (10 reviews)
Central Islip, NY 11722
25 projects

Cascella & Sons Construction Corp. brings over 30 years of industry expertise, making us the premier choice for your next project. We deliver high-quality remodels from concept to completion, collabor...

Aesthetic Renovations

★ ★ ★ ★ ★ 4.7 (10 reviews)
Bedford, NY 10506
15 projects

Aesthetic Renovations offers premier general contracting services for home repair, restoration, and remodeling in Westchester County, NY, and Southern Connecticut. Since 2002, we have delivered except...

Verified Reviews for Basement Waterproofing pros in Long Island, NY

*The Growcycle rating for Basement Waterproofing companies in Long Island, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on July 10, 2026

Sara Johnson

Reviewed in December 2025

I had a great experience with this service. They completed my basement remodel on time and within budget. Very pleased with the craftsmanship!

Rivertown General Contracting, LLC - Basement Waterproofing in Long Island, NY Rivertown General Contracting, LLC Request a quote

Sarah Mitchell

Reviewed in June 2025

The team handled our bathroom update efficiently and effectively. Everything came together beautifully, and they were great at communicating throughout the process.

ET General Construction Inc. - Basement Waterproofing in Long Island, NY ET General Construction Inc. Request a quote

Christina Vargas

Reviewed in July 2025

I had a fantastic experience with their team. They transformed my backyard into an outdoor paradise. Highly recommend their services!

Stone Creations of Long Island Pavers & Masonry - Basement Waterproofing in Long Island, NY Stone Creations of Long Island Pavers & Masonry Request a quote

Sarah Williams

Reviewed in November 2025

Kh Property Management has been a lifesaver! They manage my properties perfectly and make my life so much easier. Truly a great team to work with!

KH Property Management - Basement Waterproofing in Long Island, NY KH Property Management Request a quote

Emily Davis

Reviewed in January 2026

The team I worked with was exceptional. They listened to my ideas and provided great suggestions. The project turned out beautifully, and I highly recommend their services.

Cascella & Sons Construction Corp. - Basement Waterproofing in Long Island, NY Cascella & Sons Construction Corp. Request a quote
Cost Guide

How much does Basement Waterproofing cost in Long Island, NY?

Typical basement waterproofing projects in Long Island, NY range from $1,500 to $7,000, with most homeowners paying around $3,000.

$1,500
$3,000 Typical cost in Long Island, NY
$7,000
LOWHIGH

Prices vary by project scope, materials, and local labor rates.

Per Sq Ft $5–$15
Per Pump $800–$1,200
Per Wall $200–$500

Last updated: April 2026

Basement waterproofing services in Long Island typically cost between $1,500 to $7,000, with an average around $3,000. Factors that influence pricing include the size of the basement, the extent of water damage, and the methods used for waterproofing.

Contractors in Long Island usually charge between $100 to $175 per hour for labor. Additionally, permit requirements from the Suffolk County Department of Health Services can add to the overall costs and timeline, especially for extensive repairs.

When comparing basement waterproofing quotes in Long Island, consider asking about the warranty and the specific methods used for water management.

What affects the cost in Long Island, NY?

Long Island Labor Rates

Licensed waterproofing contractors in Long Island charge $100–$175/hr based on project complexity and experience. This reflects the higher cost of living in the area.

Permits & Inspections

Most waterproofing work in Long Island requires permits from the Suffolk County Department of Health Services. This can introduce additional fees and time for approval.

Material Selection & Quality

Choosing high-quality waterproofing materials can increase costs by 10–25%. However, investing in quality can prevent future damage and repairs.

Seasonal Demand & Scheduling

Spring and fall are ideal times for basement waterproofing in Long Island. Scheduling your project during the off-peak winter months can lead to better pricing and availability.

Frequently Asked Questions About Basement Waterproofing in Long Island, NY

While some homeowners in Long Island may consider DIY waterproofing solutions, it is often advisable to hire a professional for comprehensive and effective results. DIY methods, such as applying sealants or installing basic drainage solutions, may provide temporary relief but often do not address underlying issues. Professionals are equipped with the knowledge and tools to conduct a thorough inspection, identify potential problems, and implement effective waterproofing strategies tailored to your specific needs. Additionally, improper waterproofing can lead to further damage and costly repairs down the line. Investing in expert services ensures that your basement is properly protected against future water intrusion.

Basement waterproofing in Long Island typically involves several methods designed to prevent water from entering your basement. The process begins with a thorough inspection to identify potential water entry points, such as cracks in the foundation or issues with gutters and downspouts. Common waterproofing methods include interior and exterior drainage systems, which redirect water away from the foundation, and the application of sealants or membranes to waterproof walls and floors. In some cases, sump pumps may be installed to remove any accumulated water. By implementing these strategies, homeowners can effectively protect their basements from water damage and maintain a healthy living environment.

The longevity of basement waterproofing in Long Island largely depends on the methods used and the specific conditions of your home. Generally, professionally applied waterproofing solutions can last anywhere from 5 to 20 years, with some systems, like interior drains and sump pumps, potentially lasting longer with proper maintenance. Regular inspections and maintenance are crucial to ensuring the effectiveness of your waterproofing system over time. Homeowners should also be mindful of changes in their surroundings, such as landscaping or drainage alterations, that could impact the performance of their waterproofing. By staying proactive, you can extend the life of your waterproofing system and protect your home from water damage.

The costs of basement waterproofing in Long Island can vary widely based on several factors, including the extent of the water problem and the methods required to address it. On average, homeowners can expect to pay between $2,000 and $10,000 for comprehensive waterproofing solutions. Simple repairs, such as sealing cracks or installing a sump pump, may cost less, while extensive work involving drainage systems or wall excavations can be more expensive. It's essential to obtain multiple estimates from qualified professionals to understand the scope of work and associated costs. Investing in waterproofing can save you money in the long run by preventing costly water damage and mold remediation.

There are several signs that may indicate your basement in Long Island needs waterproofing. One of the most common signs is the presence of moisture or water stains on the walls or floor, which can lead to mold growth and structural damage if left untreated. Additionally, if you notice a musty odor, it may suggest trapped humidity or water issues. Cracks in the foundation walls or floor can also be a sign of water intrusion, as they may allow moisture to seep in. If your basement floods during heavy rain or if you experience condensation on windows, these are critical indicators that professional waterproofing may be necessary to protect your home.

Common Basement Waterproofing services and their costs

Typical pricing in Long Island, NY by service type.

Waterproofing Methods

Core Services

MethodCost Range
Interior Drainage System
Installation of a drainage system to manage moisture.
$1,500–$3,000
Exterior Waterproofing
Waterproofing the exterior walls of the basement.
$3,000–$7,000
Foundation Crack Repair
Sealing cracks to prevent water intrusion.
$200–$500
Sump Pump Installation
Installing a sump pump for water removal.
$800–$1,200

Add-On Services

Additional Waterproofing Options

MethodCost Range
Basement Ventilation
Improving air circulation to reduce humidity.
$300–$600
Sealing Wall Cracks
Applying sealants to prevent moisture ingress.
$150–$300
Waterproofing Membrane Installation
Installing membranes for added protection.
$1,000–$2,500
Mold Remediation
Removing mold caused by water damage.
$500–$1,500
Ready to start your basement waterproofing project? Get free quotes from vetted pros in Long Island, NY.
Get Free Estimates

Price ranges are estimates compiled from publicly available data and may vary with project scope.


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Browse all services
Retaining Wall Construction
Window Installation & Replacement
Roofing & Gutter Services
Siding & Exterior Remodeling
Solar Panel Installation Services
Pest Control Services
Septic Tank & Septic System Services
Garage Door Installation & Repair
Insulation Installation
Foundation Installation & Repair
Basement Waterproofing
Landscape Design
Landscape Construction
Landscape Maintenance
Landscape Repair
Land Cleaning
Garden Remodeling
Tree Planting & Transplanting
Tree & Shrub Care
Lawn Care & Mowing
Lawn Edging & Trimming
Leaf Removal & Cleanup
Seasonal Yard Cleaning
Lawn Aeration
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Paver Installation
Driveway Repair & Paving
Deck Building & Repair
Sidewalk & Pathway Installation
Fence Installation
Stone & Concrete Installation
Outdoor Lighting Installation
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Sprinkler Adjustment
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Browse all services
Retaining Wall Construction
Window Installation & Replacement
Roofing & Gutter Services
Siding & Exterior Remodeling
Solar Panel Installation Services
Pest Control Services
Septic Tank & Septic System Services
Garage Door Installation & Repair
Insulation Installation
Foundation Installation & Repair
Basement Waterproofing
Landscape Design
Landscape Construction
Landscape Maintenance
Landscape Repair
Land Cleaning
Garden Remodeling
Tree Planting & Transplanting
Tree & Shrub Care
Lawn Care & Mowing
Lawn Edging & Trimming
Leaf Removal & Cleanup
Seasonal Yard Cleaning
Lawn Aeration
Lawn Dethatching
Lawn Overseeding & Reseeding
Patio Design & Installation
Paver Installation
Driveway Repair & Paving
Deck Building & Repair
Sidewalk & Pathway Installation
Fence Installation
Stone & Concrete Installation
Outdoor Lighting Installation
Sprinkler Installation & Repair
Sprinkler Adjustment
Drip Irrigation System Installation
Irrigation System Repair
Rainwater Harvesting System Installation
Drought-Resistant Lawn Installation
Handyman Services
Air Duct Cleaning Services
Door Installation & Replacement
Drywall Installation & Repair
House Painting Services
Kitchen Remodeling
Interior Design & Decorating
Custom Cabinets & Cabinetry
Countertop Installation Services
Flooring Installation Services
Tile & Stone Installation Services
Carpet Installation
Bathroom Remodeling
Walk-In Tub Installation
Home Renovation & Remodeling Services
Design-Build Services
Custom Home Builders
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