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Long Island Chooses Us
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Linda Weiss profile picture
Linda Weiss
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We feel very fortunate to have found this company. I met with Mike regarding leaks in the basement. He assessed the entire house, gave me options and clearly explained the process. Everyone from Mike, to the secretary in the office to the workers were absolutely amazing. They did the work as promised, gave us a reasonable price, and left the place immaculate. We could not be happier with the results! This is a great family owned business. You can’t go wrong!
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rose smith profile picture
rose smith
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The work was done with the utmost professionalism and competence. The service representative was very thorough in examining the dehumidifier, air purifier and sump pump and provided any service needed including draining the pump.
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Craig Todaro profile picture
Craig Todaro
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Mark took it upon himself to come to my home and examine my issue himself. He is knowledgeable not only in basement waterproofing, but also in land grading, excavating and several other adjacent topics. While it was concluded my issue was not foundation oriented, he did not hesitate to propose several other creative ideas to help address my issue. He has a great disposition, and I would not hesitate to recommend his services to others.
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Linda Russo profile picture
Linda Russo
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I bought my house 24 years ago, and for 24 years I lived with water coming in to my finished basement. A few years back I hired another company to put in a French Drain System which never worked. As the storms got worse the water in my basement increased. Because of my previous experience I was hesitant to hire another company until I read about ACM and met Mark who was highly recommended by my Home Service Company. Mark spent about 2 hours explaining the process, and what was needed. In February 2025 ACM put a extensive French Drain System which included taking down the sheet rock walls, demoing tile and placing a membrane along the whole perimeter of the drain system. All of this work was completed in 3 days exactly what Mark said. The guys were professional, polite, and best of all they were careful to save my Radiant Heating System which was under the tile. Since the French Drain System was placed I have not had 1 drop of water coming into my basement. I am very grateful to Mark's ACM Company, and was able to refinish my basement without fear of water damage. I highly recommend ACM Basement Water Proofing to all who are having water problems with their basement.
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Maria Lacoste profile picture
Maria Lacoste
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ACM Basement Waterproofing did an excellent job in my basement, no more water intrusion. The job was handled professionally and on time. I am happy to recommend them.
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William Rothstein profile picture
William Rothstein
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I chose ACM because of their "Best of Long Island" award, and I'm glad I did. Mark's crew (led by Joe) installed an interior French drain and a sump pump in our basement. Six months later, we've had no problems with water. These guys know what they're doing.
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Links2282 profile picture
Links2282
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My wife and I would like to say thank you to Mark and his team for their excellent work installing a French Drain in our finished basement. For years we had to worry about flooding if we got a large amount of rain in a short time. The entire staff was totally professional. knowledgeable, competent and efficient. They were clean and caring and after each day they protected the whole worksite. Without a doubt, we would recommend them for all your basement waterproofing needs.
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Peter Webb profile picture
Peter Webb
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I called acm after finding water in the basement. Mark answered the call and quickly helped diagnose the issue. He guided me to check baseboard and sure enough a broken valve was causing this leak. It's good to find someone to help a homeowner without rushing to take their money. It's good to find a honest business man
Bethpage Best of Long Island Winner warded to ACM Basement waterproofing
Angi Super Service Award for ACM Basement Waterproofing in Long Island
Basement Health Association Star award given to ACM Basement Waterproofing in Long Island
Best of Long Island Award for Basement Waterproofing in Long Island
Angi Super Service Award for Basement Waterproofing in Long Island

Great River’s Superior Basement Waterproofing Business

Great River Crawl Space and Basement Water Problems Solved Fast

Truth #1: Water doesn’t need a flood to do damage.
Truth #2: A musty smell means moisture is already inside.
Truth #3: The longer you wait, the worse it gets.

In Great River, where homes sit close to the Great South Bay and groundwater runs high, moisture isn’t just common—it’s expected. We’ve seen it near Great River Road, close to the marina, and in houses that looked perfectly dry on the surface.

That’s why homeowners trust ACM Basement Waterproofing. We deliver real solutions—starting with expert basement waterproofing to keep water out and your home dry. If needed, we also provide crawl space repair and foundation repair to reinforce what’s underneath.

Don’t ignore the signs. Call ACM today and protect your Great River home—before truth #3 becomes your reality.

Great River Basement Waterproofing Customer Reviews

Customer reviews from Great River coming soon! In the meantime, take a look at our testimonials page for reviews from customers from other towns.

Getting Your Great River, NY Home Ready

With clear communication, expert guidance, and forward-thinking solutions, we ensure your basement stays dry and your foundation stays strong for the long haul. At ACM, your comfort, safety, and peace of mind are always our top priorities.

Great River, NY; Town of Islip Building Department
Phone: (631) 595-3500
Email: contactus@islipny.gov
Location: 655 Main Street, Islip NY
Office Hours: Monday, Wednesday, Friday from 9:00 AM – 3:30 PM

Great River, NY; Town of Islip, NY Links:
Town of Islip Building Department
Town of Islip; Building Division Permit Applications

Contractors for Your Great River Basin Projects

Below is a list of local contractors who may be able to assist with a variety of home improvement projects in Great River, NY. Whether you’re tackling renovations, repairs, or custom upgrades, this list is intended to help you get started. Please note that while ACM is glad to share these resources, we do not specifically endorse or guarantee the services of any contractor listed.

Plumber
Ray The Plumber
1560 Locust Ave, Bohemia, NY 11716
631-581-2500

Electrician
Marra Electric
1395-6 Lakeland Ave, Bohemia, NY 11716
631-772-8576

Driveway Paving Contractor
Top Craft Paving & Masonry
66 W Yaphank Rd, Medford, NY 11763
631-640-6641

Landscaper
Softwind Landscaping, Landscape Design & Masonry
311 Main St, Islip, NY 11751
631-553-5927

Masonry
Stone Escapes Masonry & Outdoor Design
1150 Lincoln Ave UNIT 6, Holbrook, NY 11741
631-582-2362

Stay Ahead of Storms in Great River

Heavy rains, rising groundwater, coastal storms—Great River homes face it all. But with ACM Basement Waterproofing, you don’t have to worry about what’s coming next.

We provide permanent basement waterproofing, crawl space repair, and foundation repair tailored to Long Island’s unique conditions.

Don’t wait for the next storm. Protect your Great River home today with ACM.

Protect Your Home Today

We make it simple, affordable, and stress-free — with guaranteed results.