How much does basement waterproofing cost?

<div>The <a href="https://www.angi.com/articles/how-much-does-basement-waterproofing-cost.htm">cost of basement waterproofing</a> is $4,950 for the average homeowner. However, you could end up paying between $600 and $14,000, depending on factors like basement size, waterproofing method, and the region you live in. If you live in an area with heavy rainfall, you might be paying more for waterproofing than if you lived somewhere drier since waterproofing contractors would be in high demand. Likewise, a 500-foot basement costs between $2,500 and $5,000 to waterproof, but that price rises significantly for a larger basement. </div>

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Concrete Foundation Repair

Batt, Rolled or Reflective Insulation Install or Upgrade

Seamless Metal Gutters Installation

TRUSTED BY VALLEY STREAM, NY HOMEOWNERS

4.7

Average homeowner rating

102

Verified basement leak repair services reviews

Verified Reviews for Basement Leak Repair pros in Valley Stream, NY

*The Angi rating for Basement Leak Repair companies in Valley Stream, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Leak Repair needs.

*The HomeAdvisor rating for Basement Leak Repair companies in Valley Stream, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Leak Repair needs.

Last update on August 13, 2025

Reviewed in December 2012
Searched for over an hour and eventually traced the leak to my dehumidifier which had a clogged drain and was leaking onto the floor. Did this for free. No charge.
Groundworks
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Reviewed in October 2024
I Hired This company to repair cracks in my brick facade which was causing leaks. They gave me an estimate and started the project right away. The leaks stopped. We haven’t had any problems since. the work was great. Definitely recommend!
Gotham Restoration Group
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Reviewed in July 2020
After literally years of chasing leaks in my flat roofs, John and his team got rid of all of them and they weren't even in my roof. He is the leak whisperer! His crew was great and on time, clean and professional. I couldn't recommend them enough!
Leak Stoppers Inc
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Reviewed in December 2020
I had a leak in my foundation in my crawl space and found General Brick Designs on Angie’s list. I had other contractors look at the problem but found Ed to be more thorough and knowledgable when he came to evaluate the problem. He came in with his crew, was on site the entire time and was able...
GENERAL BRICK DESIGNS
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Reviewed in September 2016
Great. Eddie the owner was fantastic. Identified the problem and advised what the solution would be. The crew that performed the work were excellent. They explained exactly what they were doing and were professional and courteous. Left the backyard cleaner than the way they found it.
E & M Waterproofing Inc
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Reviewed in November 2012
When they came over to do the estimate they said we needed a masonry and not basement water proofing. They were very helpful. Very very professional. When we needed them they came out on time and were very good.
Just Right Painting & Contracting LLC
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Reviewed in December 2014
The job was done in a timely very professional manner. My wife was at home while they were doing the work and she felt very comfortable and respected. The concrete around the house was cut and new concrete was put in to fix the leaking problem. It now looks very neat and water is no longer...
Nunez Construction and Painting
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Reviewed in March 2016
Had a little flood in the basement while doing laundry. Called at 8:15 AM on Saturday morning, and someone came by 9:30 AM. Turned out it was just a clog, but they are always so quick to respond and very helpful. We called them a few weeks ago when it was freezing cold out, and we had no...
Advanced Professional Plumbing Heating & Cooling
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Reviewed in October 2014
The provider thoroughly inspected our basement for leaks and recommended a french drain system. Fortunately, the need is not immediate.
Sundahl Restoration LLC
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Reviewed in July 2020
I can’t say enough positive things about them! The team was just wonderful. They were thorough, conscientious, professional, and dedicated to getting the job done right. They uncovered the source of the leak (which took removing bricks and stone), fixed it, waterproofed the roof, and put...
A.M. Shield Waterproofing Corp
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Basement leak repair pros in Valley Stream

Customers say: True professional

32 local quotes requested

42 years of experience

Your Way Contractors: Has the skilled professionals to do everything you need in-house from planning and design, construction, installation, and finishing of all details. Our creative and sophisticated thinking, combined with in-depth knowledge of city codes and building regulations are essential to designing to the maximum potential of your space and finishing the job in a timely manner.

"Gene and his crew did a great job on a difficult project. The house is over 100 years old and had been renovated several times in the past. Gene’s strength is to work collaboratively with his client to ensure the project meets the customer’s expectation. This project changed a couple of times based on what we found during demolition. Gene provided options and was always upfront about the cost of each option. We set out a schedule and the crew showed up on time for the day and on schedule for the week. I am very happy with the work."

Stephen B on July 2024

Classic Remodeling Group Inc

Classic Remodeling Group Inc

Customers say: Super punctual

Recommended by 93% of Angi customers

195 local quotes requested

Full service remodeling, roofing and siding contractors serving Long Island. Whether you are in need of new roof installation, roof restoration, or roof repairs; new siding installation, siding repairs; new windows & doors installation; kitchen remodeling; bathroom remodeling; we are the Long Island home remodeling contractors to call, due to our professionalism and affordability.

"It went excellent! John and his crew were very knowledgeable and very professional. The quote was also very fair. My family loves our new looking home. I will definitely recommend Classic Remodeling Group to friends and family."

Tony K on July 2025

Convenient Kitchen and Bath Design Inc

Convenient Kitchen and Bath Design Inc

Customers say: Super punctual

14 local quotes requested

29 years of experience

Whether it's finally time to get the gourmet kitchen of your dreams or you need a bathroom remodel to accommodate a family member's special needs, Convenient Kitchen and Bath Design is the remodeling contractor for the job. Established in 1996 by owner Joe David, our team has nearly 15 years of experience as kitchen bath remodeling contractors. We're a local, family owned company and we go above and beyond to bring our customers the beautifully remodeled homes they've always wanted. If you're ready to upgrade or enhance your house, Convenience Kitchen and Bath Design is ready to help. Our professionals are here to bring out the best in your home.

"Amazing! Joe and the team finished our kitchen in record time and everything looks spectacular. We couldn’t be happier."

Bernadette S on June 2024

"Amazing! Joe and the team finished our kitchen in record time and everything looks spectacular. We couldn’t be happier."

Bernadette S on June 2024

OZ General Contracting Co Inc

OZ General Contracting Co Inc

Customers say: Super punctual

Recommended by 93% of Angi customers

35 local quotes requested

OZ General Contracting Co Inc. has an over 30 year extensive portfolio of incredible kitchen and bathroom renovations in Nassau and Suffolk County Long Island, NY. We are innovative, efficient, reliable, and we always exceed our client’s expectations.

"I hired Oz General Contracting Co Inc in 2013 to remodel my kitchen. The company also remodeled my half bath in 2021 and in 2025 remodeled our main bathroom and linen closet. Every project turned out great! Everyone involved with my projects was courteous, talented, and professional. Ozi Ovadia is a master at maximizing space. I highly recommend this company."

Frank D on April 2025

Customers say: Quick response

Recommended by 100% of Angi customers

497 local quotes requested

Right Stone Masonry takes pride in helping residential, commercial, and industrial property owners maintain safety, preserve character, and repair masonry structures, whether You want to keep Your building in great condition or achieve a new vision entirely.

"James and his team showed an interest in protecting my home. They provided prompt and courteous service while producing results of the highest quality."

Sean C on July 2025

"James and his team showed an interest in protecting my home. They provided prompt and courteous service while producing results of the highest quality."

Sean C on July 2025

Interior Source

Located In East Meadow

Located In East Meadow

Customers say: Quick response

Recommended by 97% of Angi customers

52 local quotes requested

Interior Source, Inc. is a family owned 5 Stars renovation company, reliable & trustworthy renovation company in Long Island. With over 20 years of experience in Kitchen, Bathroom, Basement & all interior renovation in Long Island, Interior Source offers exceptional home free consultation helping homeowners to implement their ideas into design reality. Interior Source is also proud to won 2 consecutive Angies Super Service awards 2022 & 2023 which stamped us as best renovation company in Long Island. We specialize in beautiful customized bathrooms & kitchens at an avoidable price. If you're looking for a company that provides unparalleled quality, outstanding service, and beautiful outcomes, then look no further than Interior Source. We work closely with each client to understand their unique needs and preferences, and our commitment to customer satisfaction means we won't rest until you are 100% happy with our work.

"Professional, Affordable, Excellent Work! We love our new kitchen and bathroom! From the beginning Mohammad Sayed stood out from the other contractors because he was professional, affordable and knowledgeable…even giving us sound advice before we hired him. His team did excellent work and were incredibly responsive, keeping us informed every step of the way. Mohammad always addressed our concerns promptly. He allowed us to lead the process by choosing what we wanted and how we wanted it. Mohammad and his team were professional, reliable, and made the entire process smooth and stress-free. The communication was excellent, and we appreciated how Mohammad listened to our needs and incorporated them into the design. We wholeheartedly recommend this contractor."

Christopher O on June 2025

JBL HOME IMPROVEMENTS INC

JBL HOME IMPROVEMENTS INC

Customers say: Quality work

Recommended by 90% of Angi customers

296 local quotes requested

JBL Home Improvements, Inc, located in St. James, is a family owned and operated remodeling business specializing in residential projects. Owner & Contractor David Kaplan, General Manager Jill Kaplan, along with their team of talented professionals, are dedicated to providing outstanding workmanship and customer service to homeowners who live in their community.

"I am very pleased with my remodel. Dave was professional and his crew were on time, worked every day and took care of my house like it was their own!"

Jennie D on July 2025

"I am very pleased with my remodel. Dave was professional and his crew were on time, worked every day and took care of my house like it was their own!"

Jennie D on July 2025

Stone's Construction Corp.

Stone's Construction Corp.

Customers say: Quality work

Recommended by 96% of Angi customers

46 local quotes requested

Stone's Construction has been in business since 1986. We are fully insured and have a clean record with Consumer Affairs. Our estimates are free and you deal with the owner. The company continuously provides customers with the best quality and value for the best prices out there. We specialize in Dormers,Extensions,Kitchens,Bathrooms,Basements,Siding, House Lifting, Porticos, Masonry

"I gave a deposit to start a job. A contract was never signed and work was never started. I decided to go in a different direction, Provider initially offered only a $250 refund, I deemed that unacceptable. Provider now has not responded to any attempted communication since approximately May 7."

Vincent P on May 2025

Kitchen & Bath Works INC

Kitchen & Bath Works INC

Customers say: Quick response

Recommended by 99% of Angi customers

25 local quotes requested

Kitchen and Bath Works Inc has been owner operated and successfully in business since 1994. Offering a consultative approach and delivering on quality, custom work, our business has been overwhelmingly driven by word of mouth referrals. From start to finish, we stand by our work and our owner is committed to being present on all jobs.

"Lou renovated my kitchen last year and I was completely satisfied. I called him back this summer to gut and remodel my bathroom. He was extremely considerate, and he treated my house as if it were his own. My house is small, and I only have one bathroom. The project took nine days. I was anticipating that there would be a big mess and a huge inconvenience. But even the demo was done very neatly and efficiently. Lou even took the time to re-connect the toilet each night so that I wouldn't be left without. Lou did an amazing job, and it was a pleasure working with him. Once again, I am pleased to recommend Lou for your kitchen or bath project."

Janet M on November 2023

Northgate Home Improvement Corp.

Northgate Home Improvement Corp.

Customers say: True professional

Recommended by 98% of Angi customers

31 local quotes requested

Please call my mobile phone for faster service: 516-449-8700!! Also, please provide a call back number in your inquiry. Northgate Home Services is a complete home services company which will handle all of your home improvement needs - inside and out. I will personally work with you to design and complete your home improvement project so that it meets all of your needs and expectations. Northgate Home Services is licensed and insured in both Suffolk and Nassau counties.

"I have had Jeff and his guys renovate my ranch house in Melville. He has done 2 bathrooms, my basement and my kitchen. He has always been reliable and done great work. The house looks like new. He quickly corrects any problems and is always in touch. He and his guys are friendly and neat. His estimates are reasonable. I strongly recommend Northgate Home Improvement."

Peter P on March 2025

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FAQs for basement leak repair projects in Valley Stream, NY

The cost to finish a basement is $18,400 for the average homeowner. However, this cost could be as little as $2,800 or as much as $34,500, depending on the basement size and the materials needed. If your basement is already outfitted with electrical and plumbing, expect the cost to fall on the lower end.

For example, the drywall cost for this project averages around $1,750, but other features, like hiring a plumber, cost between $45 and $200 per hour.

The cost to remodel a basement is between $12,100 and $33,400 for the average homeowner. The price you pay can be as little as $3,500 or as much as $50,200, depending on the size and condition of your basement and the type of remodel you're doing.

If you're doing a simple project like adding a home office to your basement, you can expect to pay anywhere from $500 to $3,000. However, if you're adding a bathroom, which is an extensive project, you can expect to pay between $6,600 to $16,500.

Damp proofing and waterproofing are both methods to help keep your basement dry. Damp proofing keeps soil moisture from entering your basement, which is helpful since your basement is underground. Waterproofing, however, keeps both soil moisture and liquid water out of the basement, which is essential, especially if you live in a wet environment. Because it’s more protective, waterproofing typically costs more than damp proofing.

Although homeowners often use the terms basement remodeling and basement finishing interchangeably, they are quite different terms.

Finishing a basement is the process of taking a basement space that is not habitable and adding elements to make it usable. This includes adding plumbing, flooring, and insulation.

Remodeling a basement means taking an already existing finished basement and changing it, often by adding or removing walls, adding plumbing, or changing the existing flooring.

The cost of basement waterproofing is $4,950 for the average homeowner. However, you could end up paying between $600 and $14,000, depending on factors like basement size, waterproofing method, and the region you live in.

If you live in an area with heavy rainfall, you might be paying more for waterproofing than if you lived somewhere drier since waterproofing contractors would be in high demand. Likewise, a 500-foot basement costs between $2,500 and $5,000 to waterproof, but that price rises significantly for a larger basement.

The Valley Stream, NY homeowners’ guide to basement leak repair services

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