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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon62
    Verified basement waterproofing services reviews

Verified Reviews for Basement Waterproofing pros in Port Washington, NY

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

*The HomeAdvisor rating for Basement Waterproofing companies in Port Washington, 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 September 04, 2025

Basement waterproofing pros in Port Washington

Avatar for Quality 1st Basement Systems

Quality 1st Basement Systems

359 RT-35
4.51(
289
)
•Approved Pro

Quality 1st Basement Systems

359 RT-35
4.51(
289
)
•Approved Pro
Customers say: Super punctual
353 local quotes requested
39 years of experience

Quality 1st Basement Systems has been helping homeowners improve their homes for over 20 years. We have currently helped over 6,000 homeowners with All Things Basementy by designing effective solutions for their home’s needs. Whether our homeowners are interested in waterproofing a wet basement, fixing cracked foundation walls, insulating their crawl spaces, finishing their basements with mold-resistant materials, and raising concrete slabs, we can help! We’re currently the largest waterproofing company serving both residential and commercial clients in the tri-state area and are continuing to grow. As a member of the internationally renowned Basement Systems, Inc. network and Foundation Supportworks, Inc. network, we have global resources, but provide local service! The Basement Systems network thoroughly trains our employees at the Basement Systems, Inc. corporate headquarters in CT. Our hard work and dedication to our customers have earned us an A+ rating with the Better Business Bureau and several Super Service Awards from Angie’s List. We service most of New Jersey, all 5 boroughs of New York City and certain parts of Pennsylvania. Thousands of homeowners have experienced the Quality 1st Basement Systems difference. We invite you to do your homework and check out our credentials and compare. Put our experience and integrity to work protecting your investment. Our reputation exceeds all others because of our culture of WOW customer service.

"Everything went smoothly"

Hector R on December 2023

Quality 1st Basement Systems has been helping homeowners improve their homes for over 20 years. We have currently helped over 6,000 homeowners with All Things Basementy by designing effective solutions for their home’s needs. Whether our homeowners are interested in waterproofing a wet basement, fixing cracked foundation walls, insulating their crawl spaces, finishing their basements with mold-resistant materials, and raising concrete slabs, we can help! We’re currently the largest waterproofing company serving both residential and commercial clients in the tri-state area and are continuing to grow. As a member of the internationally renowned Basement Systems, Inc. network and Foundation Supportworks, Inc. network, we have global resources, but provide local service! The Basement Systems network thoroughly trains our employees at the Basement Systems, Inc. corporate headquarters in CT. Our hard work and dedication to our customers have earned us an A+ rating with the Better Business Bureau and several Super Service Awards from Angie’s List. We service most of New Jersey, all 5 boroughs of New York City and certain parts of Pennsylvania. Thousands of homeowners have experienced the Quality 1st Basement Systems difference. We invite you to do your homework and check out our credentials and compare. Put our experience and integrity to work protecting your investment. Our reputation exceeds all others because of our culture of WOW customer service.

"Everything went smoothly"

Hector R on December 2023

Avatar for Long Hill Masonry Corp

Long Hill Masonry Corp

80 Horseblock Road
4.92(
26
)
•Approved Pro

Long Hill Masonry Corp

80 Horseblock Road
4.92(
26
)
•Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
29 local quotes requested

**We have now expanded our Foundation Services**Long Hill Masonry has been providing a tradition of expert craftsmanship, quality and service for over 30 years. The company is owned and operated by Joseph Tavella, who himself comes from generations of masons. It is our goal to achieve the highest standard of quality in every project. We guarantee our workmanship for one full year, and most projects are payable upon completion of job take a look at our website at www.longhillmasonry.com

"Joe Cam down to do an estimate and he was very knowledgeable. The Quote was Fair and I had hired them to do the job. They came on time and the job came out great. I would recommend Long Hill to everyone I know"

Christian G on August 2023

**We have now expanded our Foundation Services**Long Hill Masonry has been providing a tradition of expert craftsmanship, quality and service for over 30 years. The company is owned and operated by Joseph Tavella, who himself comes from generations of masons. It is our goal to achieve the highest standard of quality in every project. We guarantee our workmanship for one full year, and most projects are payable upon completion of job take a look at our website at www.longhillmasonry.com

"Joe Cam down to do an estimate and he was very knowledgeable. The Quote was Fair and I had hired them to do the job. They came on time and the job came out great. I would recommend Long Hill to everyone I know"

Christian G on August 2023

Avatar for New Horizon Homes, Inc.

New Horizon Homes, Inc.

1430 Hallock Avenue
4.83(
12
)
•Approved Pro

New Horizon Homes, Inc.

1430 Hallock Avenue
4.83(
12
)
•Approved Pro
Customers say: Quality work
169 local quotes requested
23 years of experience

New Horizon Homes, Inc. is locally owned and operated. We pride ourselves on providing quality work and great customer service. Our customer's complete satisfaction is our top priority! Please call today for your free estimates.

"I dealt with the owner Paul from start to finish. We had purchased all of the materials for the renovation of our bathroom as well as our master bedroom, halls and entire first floor ceiling. Paul and his crew made our entire plan come alive and completed the project in the time span they had promised. We are thrilled with how well every thing went. We had them do an additional project on the exterior of our house after completion of the interior work and this was handled as well. the few minor problems that occurred were rectified with no delay, and to our complete satisfaction."

Tom S on December 2017

New Horizon Homes, Inc. is locally owned and operated. We pride ourselves on providing quality work and great customer service. Our customer's complete satisfaction is our top priority! Please call today for your free estimates.

"I dealt with the owner Paul from start to finish. We had purchased all of the materials for the renovation of our bathroom as well as our master bedroom, halls and entire first floor ceiling. Paul and his crew made our entire plan come alive and completed the project in the time span they had promised. We are thrilled with how well every thing went. We had them do an additional project on the exterior of our house after completion of the interior work and this was handled as well. the few minor problems that occurred were rectified with no delay, and to our complete satisfaction."

Tom S on December 2017

Infinity Waterproofing And Construction LLC

208 Harbor Drive Suite 213
New on AngiNew on Angi
•Approved Pro

Infinity Waterproofing And Construction LLC

208 Harbor Drive Suite 213
New on AngiNew on Angi
•Approved Pro
118 local quotes requested
23 years of experience

We take great pride in our experience, expertise, quality, and customer service provided to meet your needs. It is our mission to exhibit excellent workmanship and supreme dedication from start to finish of a project. We understand the needs and expectations of our customers, and take great care to work and communicate with them in a courteous and professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job. infinitywaterproofingandconstructionllc.com

We take great pride in our experience, expertise, quality, and customer service provided to meet your needs. It is our mission to exhibit excellent workmanship and supreme dedication from start to finish of a project. We understand the needs and expectations of our customers, and take great care to work and communicate with them in a courteous and professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job. infinitywaterproofingandconstructionllc.com

A&H Waterproofing, LLC

48 Ray Ave.
New on AngiNew on Angi
•Approved Pro

A&H Waterproofing, LLC

48 Ray Ave.
New on AngiNew on Angi
•Approved Pro
1 years of experience
Free onsite estimate

A&H Waterproofing, LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 9 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

A&H Waterproofing, LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 9 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

Charlie Lopez Barillas

710 23rd Street Apt 1
2.00(
2
)
•Approved Pro

Charlie Lopez Barillas

710 23rd Street Apt 1
2.00(
2
)
•Approved Pro
264 local quotes requested
10 years of experience

Charlie Lopez Barillas is a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"We had Mr. Barillas come power wash our roof and seal it. His guy left a huge mess of roof tiles and roofing particles all over our front and back yard. I called him to have the guy come back. He said he couldn't because he was on to another job and wouldn't be able to come back for two weeks. He also tried to get us to hire him to replace the roof. He sent videos of roof damage. Who knows if the damage was done by his guy during the cleaning! I talked with another roofer and they said that for a roof cleaning company to recommend a new roof is unethical. I did a search for his company and could not find it on the internet. His website is not working and the address on the receipt after searching it out does not show his company. Attached are pictures of the mess left"

Michael L on August 2025

Charlie Lopez Barillas is a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"We had Mr. Barillas come power wash our roof and seal it. His guy left a huge mess of roof tiles and roofing particles all over our front and back yard. I called him to have the guy come back. He said he couldn't because he was on to another job and wouldn't be able to come back for two weeks. He also tried to get us to hire him to replace the roof. He sent videos of roof damage. Who knows if the damage was done by his guy during the cleaning! I talked with another roofer and they said that for a roof cleaning company to recommend a new roof is unethical. I did a search for his company and could not find it on the internet. His website is not working and the address on the receipt after searching it out does not show his company. Attached are pictures of the mess left"

Michael L on August 2025

Avatar for Zavza Seal, LLC

Zavza Seal, LLC

377 Main St. Suite 6
4.92(
43
)
•Approved Pro

Zavza Seal, LLC

377 Main St. Suite 6
4.92(
43
)
•Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
4 years of experience

Zavza Seal is an experienced high end general contracting firm with a passion for delivering excellence. Serving Long Island communities including Suffolk, and Nassau counties. We are a one-stop shop construction company that specializes in the following: waterproofing basements, paving and sealing driveways and garages, waterproofing parking structure and concrete commercial roofs. Concrete Swimming pool buildout, Stone paving and tuck-pointing work. If you are considering any type of waterproofing project and concrete work we are here to help and can provide valuable, time-saving advice. We also specialize in waterproof concrete for professional and residential use called Basecrete. Call today for a free estimate!

"I hired Zavza Seal to waterproof my basement and they did an exceptional job! The team was professional, thorough and went the extra mile to ensure everything was done perfectly. I'm happy with their work and highly recommend them to anyone!"

Levan C on September 2024

Zavza Seal is an experienced high end general contracting firm with a passion for delivering excellence. Serving Long Island communities including Suffolk, and Nassau counties. We are a one-stop shop construction company that specializes in the following: waterproofing basements, paving and sealing driveways and garages, waterproofing parking structure and concrete commercial roofs. Concrete Swimming pool buildout, Stone paving and tuck-pointing work. If you are considering any type of waterproofing project and concrete work we are here to help and can provide valuable, time-saving advice. We also specialize in waterproof concrete for professional and residential use called Basecrete. Call today for a free estimate!

"I hired Zavza Seal to waterproof my basement and they did an exceptional job! The team was professional, thorough and went the extra mile to ensure everything was done perfectly. I'm happy with their work and highly recommend them to anyone!"

Levan C on September 2024

Diamond Masonry & Waterproofing

1378 Whittier Avenue
5.00(
5
)

Diamond Masonry & Waterproofing

1378 Whittier Avenue
5.00(
5
)
25 local quotes requested

Diamond Masonry & Waterproofing was founded on a passion for the trade. We have been in the masonry and basement waterproofing trade since 1988 and formed diamond masonry & waterproofing in 2000.our knowledge and expertise of the industry has led us to small jobs and large scale commercial projects. No job is the same so we enjoy the challenges of all projects.

Diamond Masonry & Waterproofing was founded on a passion for the trade. We have been in the masonry and basement waterproofing trade since 1988 and formed diamond masonry & waterproofing in 2000.our knowledge and expertise of the industry has led us to small jobs and large scale commercial projects. No job is the same so we enjoy the challenges of all projects.

Kingdom Masonry & Home Improvement's

16 Parker Avenue
No reviews

Kingdom Masonry & Home Improvement's

16 Parker Avenue
No reviews
Free onsite estimate

Hi Everyone Kingdom Masonry & Home Improvements We Offer All Types Of Home Improvements Always Happy To Help With Any Project No Matter How Small/Big Offer High Quality Service Same Day Call Out Service Free Quotes On All Projects Have A Good One Everyone Give Us A Call Anytime

Hi Everyone Kingdom Masonry & Home Improvements We Offer All Types Of Home Improvements Always Happy To Help With Any Project No Matter How Small/Big Offer High Quality Service Same Day Call Out Service Free Quotes On All Projects Have A Good One Everyone Give Us A Call Anytime

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FAQs for basement waterproofing projects in Port Washington, NY

Due to the nature of basements, some level of waterproofing is necessary to prevent water from seeping in and causing damage. Some definitive signs that your basement needs waterproofing measures or needs existing waterproofing measures need to be updated include:

  • Water in your basement, including damp walls or puddles on the floor

  • Mold spots in your basement

  • Musty smells or odors

  • Warped doors or walls

  • Cracks in walls

  • Insect issues, such as cockroaches and termites

You can DIY basement waterproofing in some ways to help save on the overall costs. If your basement isn’t experiencing a lot of water but is noticeably humid, you can try running a dehumidifier that will pull the excess water out of the air. If you notice water leaking due to outdoor drainage issues, you can add downspout extensions to keep rainwater away from your home. 

However, if the problem is more severe and requires a more extensive solution, it’s best to call a basement waterproofing professional to assess the treatment you need and install waterproofing safeguards properly. Since keeping water out of your basement is important, ensuring this job is done correctly the first time is best.

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.

Several factors dictate if you should waterproof the interior or exterior of your basement. Waterproofing the exterior of your home is a great option if you use your basement for storage, as it provides the most protection from water and water damage. If you prefer work done outside of your home versus inside, exterior waterproofing is best for you. However, interior waterproofing is often less expensive since the area is easier to reach and requires less labor.

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 Port Washington, NY homeowners’ guide to basement waterproofing services

From average costs to expert advice, get all the answers you need to get your job done.

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