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Verified Reviews for Basement Waterproofing pros in Greenport, NY
*The Angi rating for Basement Waterproofing companies in Greenport, 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 Greenport, 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 December 13, 2025
Find Basement waterproofing pros in Greenport
Basement Man
Basement Man
Basement Man is your locally owned and operated basement waterproofing specialist. We stand behind and guarantee all of our work, so give us a call anytime for a free estimate.
"Jack Brady and his crew at Basement Man are wonderful. Jack is honest, considerate, and very much an old-school professional. You tell him and his crew what you want done and they'll tell you what's possible, what it will cost (which is always reasonable and never with an up-charge), and how long it will take. Jack's crew were on-time, worked efficiently, and were never in the way. My crawlspace was encapsulated on time and on budget. I highly recommend Basement Man (Jack) and his team for any basement or crawlspace needs."
Brian H on December 2025
Basement Man is your locally owned and operated basement waterproofing specialist. We stand behind and guarantee all of our work, so give us a call anytime for a free estimate.
"Jack Brady and his crew at Basement Man are wonderful. Jack is honest, considerate, and very much an old-school professional. You tell him and his crew what you want done and they'll tell you what's possible, what it will cost (which is always reasonable and never with an up-charge), and how long it will take. Jack's crew were on-time, worked efficiently, and were never in the way. My crawlspace was encapsulated on time and on budget. I highly recommend Basement Man (Jack) and his team for any basement or crawlspace needs."
Brian H on December 2025
Basement Man
Basement Man
WHY--THIS IS A JOB FOR BASEMENT MAN!!! Your locally owned and operated Basement Waterproofing Specialist. Why am I YOUR Basement Waterproofing Specialist? Because over a 38 year period, I've built over 110 customer homes all over Long Island and I know Basements! We stand behind and guarantee all of our work, so give us a call anytime for a free estimate.
"Things went great I'd hire him again"
John R on May 2025
WHY--THIS IS A JOB FOR BASEMENT MAN!!! Your locally owned and operated Basement Waterproofing Specialist. Why am I YOUR Basement Waterproofing Specialist? Because over a 38 year period, I've built over 110 customer homes all over Long Island and I know Basements! We stand behind and guarantee all of our work, so give us a call anytime for a free estimate.
"Things went great I'd hire him again"
John R on May 2025

Budget Dry Waterproofing, Inc.
Budget Dry Waterproofing, Inc.
Budget Dry Waterproofing is a waterproofing company founded on the belief that quality home improvement work does not need to break the bank. We are dedicated to providing excellent service.
"Chris was efficient and friendly. Got the job done quickly. "
M S on November 2025
Budget Dry Waterproofing is a waterproofing company founded on the belief that quality home improvement work does not need to break the bank. We are dedicated to providing excellent service.
"Chris was efficient and friendly. Got the job done quickly. "
M S on November 2025

Lorenzo Napolitano Construction Inc.
Lorenzo Napolitano Construction Inc.
We're dedicated to providing our clients with the very best in concrete installation for driveways, sidewalks, patios, steps, and a variety of other projects. We also specialize in all Stone Work including fireplace installations, pavers, & stucco siding. With over 25 years of industry experience, we take and enormous amount of pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.
"Great knowledgable guys. Very happy with their work"
Vincent R on September 2025
We're dedicated to providing our clients with the very best in concrete installation for driveways, sidewalks, patios, steps, and a variety of other projects. We also specialize in all Stone Work including fireplace installations, pavers, & stucco siding. With over 25 years of industry experience, we take and enormous amount of pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.
"Great knowledgable guys. Very happy with their work"
Vincent R on September 2025

New York Waterproofing
New York Waterproofing
Struggling with basement water infiltration? New York Waterproofing offers unparalleled expertise in stopping water and hydrostatic pressure, endorsed by merchant engineers globally. Our basement waterproofing service guarantees the best solution nationwide. If competitors offer a better price, it's free! Our innovative process ensures water-tight basements without pumps or drains, even in severe conditions. Within hours, we eliminate water, mold, and odors permanently. Utilizing proprietary technology, our method seals water and moisture effectively and permanently. Plus, our guarantees are permanent and transferable, ensuring lasting peace of mind for homeowners. Projects start at $1299, a fraction of conventional costs, completed in a day! Call (631) 806-9690 for a free estimate. Opt for our efficient, and most affordable solution!
"Wonderful respectable people who work very hard to get the job done."
Joan W on September 2024
Struggling with basement water infiltration? New York Waterproofing offers unparalleled expertise in stopping water and hydrostatic pressure, endorsed by merchant engineers globally. Our basement waterproofing service guarantees the best solution nationwide. If competitors offer a better price, it's free! Our innovative process ensures water-tight basements without pumps or drains, even in severe conditions. Within hours, we eliminate water, mold, and odors permanently. Utilizing proprietary technology, our method seals water and moisture effectively and permanently. Plus, our guarantees are permanent and transferable, ensuring lasting peace of mind for homeowners. Projects start at $1299, a fraction of conventional costs, completed in a day! Call (631) 806-9690 for a free estimate. Opt for our efficient, and most affordable solution!
"Wonderful respectable people who work very hard to get the job done."
Joan W on September 2024

Home Healthy Homes, Inc.
Home Healthy Homes, Inc.
Home Healthy Homes is your source for quality basement waterproofing, mold removal, and indoor air quality services. With more than forty years of combined experience helping families heal homes and feel better, Home Healthy Homes knows about the dangers of what you cannot see. Give us a call and a Home Healthy Homes licensed waterproofing, mold, and indoor air quality consultant, will come to your home to provide you with a Free Inspection and on-the-spot Estimate. In an effort to heal your home as quickly as possible, in most cases we are able to complete the job the very same day! We are licensed, mold certified, and members in good standing with the National Association of Waterproofing and Structural Repairs Contractors and the Environmental Solutions Association. Our commitment to healing homes and protecting children and families from the health risks of poor indoor air quality is demonstrated by the care we take and in the quality of the work we do.
"Tey did a good job from what I can see. Of course the proof will be in the next big rainfall"
ellen c on August 2024
Home Healthy Homes is your source for quality basement waterproofing, mold removal, and indoor air quality services. With more than forty years of combined experience helping families heal homes and feel better, Home Healthy Homes knows about the dangers of what you cannot see. Give us a call and a Home Healthy Homes licensed waterproofing, mold, and indoor air quality consultant, will come to your home to provide you with a Free Inspection and on-the-spot Estimate. In an effort to heal your home as quickly as possible, in most cases we are able to complete the job the very same day! We are licensed, mold certified, and members in good standing with the National Association of Waterproofing and Structural Repairs Contractors and the Environmental Solutions Association. Our commitment to healing homes and protecting children and families from the health risks of poor indoor air quality is demonstrated by the care we take and in the quality of the work we do.
"Tey did a good job from what I can see. Of course the proof will be in the next big rainfall"
ellen c on August 2024

ProSeal Waterproofing
ProSeal Waterproofing
I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!
"Alex was amazing!! We had a crack in our foundation that another company attempted to repair numerous times. We were fortunate enough to hear about ProSeal and I am happy to report not only did Alex repair the crack to near perfection but the work was done timely, neatly and his customer service skills are top notch. I would HIGHLY recommend ProSeal for all of your foundation needs."
Angela M on October 2025
I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!
"Alex was amazing!! We had a crack in our foundation that another company attempted to repair numerous times. We were fortunate enough to hear about ProSeal and I am happy to report not only did Alex repair the crack to near perfection but the work was done timely, neatly and his customer service skills are top notch. I would HIGHLY recommend ProSeal for all of your foundation needs."
Angela M on October 2025

New Horizon Homes, Inc.
New Horizon Homes, Inc.
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

Foundation Crack Repair, LLC
Foundation Crack Repair, LLC
The team at Foundation Crack Repair can diagnose any problems with the concrete, or brick surfaces in and around your Long Island home. We are also here to make sure that you are practicing regular maintenance procedures to ensure that you are keeping things from further repair or replacement. Our team is skilled in ascertaining problems related to concrete foundations and can discuss all of your repair options with you as well as reliable home remodeling services to take the next step with finishing touches. We also make every customer experience flexible and customized so that we can work with you on whatever you need from schedule to budget. Our services go above and beyond any other Long Island because we work with you on every step and every crack that you need to be addressed.
"Everybody was amazing very professional from Kayla on the phones to Tyler on the estimate. the work was done in a timely manner decently priced 10 out of 10 recommend"
nel s on November 2025
The team at Foundation Crack Repair can diagnose any problems with the concrete, or brick surfaces in and around your Long Island home. We are also here to make sure that you are practicing regular maintenance procedures to ensure that you are keeping things from further repair or replacement. Our team is skilled in ascertaining problems related to concrete foundations and can discuss all of your repair options with you as well as reliable home remodeling services to take the next step with finishing touches. We also make every customer experience flexible and customized so that we can work with you on whatever you need from schedule to budget. Our services go above and beyond any other Long Island because we work with you on every step and every crack that you need to be addressed.
"Everybody was amazing very professional from Kayla on the phones to Tyler on the estimate. the work was done in a timely manner decently priced 10 out of 10 recommend"
nel s on November 2025

Twin Fork Waterproofing, LLC
Twin Fork Waterproofing, LLC
For over 30 years Twin Fork Waterproofing, Inc. has been a family owned and operated business located on the East End of Long Island. We have been the #1 choice of thousands of homeowners and businesses on the North and South Forks and Shelter Island for basement waterproofing and mold disinfection, safe insulation, foundation repair, drainage systems, dehumidifiers, remediation of rodent feces, etc. Twin Fork Waterproofing, Inc. Uses all environmentally safe mildicides and disinfections for your safety and guarantees our work. Call or text us today for a free evaluation.
"Just excellent start to finish - I’ve been battling water in my basement for years and finally have no more anxiety during a heavy rainstorm. The new humidifier and waterproofed basement was money well spent - and the work and care from this top notch team was outstanding. Highly recommend them. Quality work at a fair price."
Marian Z on May 2025
For over 30 years Twin Fork Waterproofing, Inc. has been a family owned and operated business located on the East End of Long Island. We have been the #1 choice of thousands of homeowners and businesses on the North and South Forks and Shelter Island for basement waterproofing and mold disinfection, safe insulation, foundation repair, drainage systems, dehumidifiers, remediation of rodent feces, etc. Twin Fork Waterproofing, Inc. Uses all environmentally safe mildicides and disinfections for your safety and guarantees our work. Call or text us today for a free evaluation.
"Just excellent start to finish - I’ve been battling water in my basement for years and finally have no more anxiety during a heavy rainstorm. The new humidifier and waterproofed basement was money well spent - and the work and care from this top notch team was outstanding. Highly recommend them. Quality work at a fair price."
Marian Z on May 2025
FAQs for basement waterproofing projects in Greenport, 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 Greenport, NY homeowners’ guide to basement waterproofing services
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