Get matched with top sump pump or interior foundation drains installers in Thornwood, NY

"Gregg and his team were on time, extremely professional, neat, all of the above! The quality of the job done is 100% effective. I had Hydro-static pressure and water coming in through my basement floors every time it rained, Gregg analyzed everything in a matter of seconds, gave me an absolute fair price, best in the industry, gave me a commercial quality job at my residence and even took care of relative issues that I had in my basement concerning the garage area, the level of the floor, and an old sump pump. I would absolutely recommend Gregg Segnit and Contractor's Waterproofing, Corp. for anyone's water proofing needs. He has been in this profession for years and knows what he is doing. He stuck by his word to everything he said, and actually left my basement in better shape than it was before, outside of waterproofing. Since him and his team completed the job I have not seen one ounce of water in the basement. Not one drop. Before then, every time it rained outside I would get water coming into my basement from all angles, the wall and floor. He installed in my opinion the perfect interior drain system for my home, at a reasonable price, and with a lifetime guarantee, I cannot be happier as a homeowner. I will never go to anyone else for my waterproofing needs. Thanks again Gregg and team"

"Connecticut Basement Systems prides themselves on their superior customer service, and they really live up to that. Their communication, quality of products and service, and attentiveness to customer needs is unsurpassed. Here are a couple of examples of how they go the extra mile for a satisfied customer: They installed their basement drainage system around my existing heating oil tank, but as I'm planning to convert away from oil this summer, they offered to come back AT NO EXTRA CHARGE once the tank is removed, to reroute the drainage system. Also, I was scheduled for a 3-day project, which included the replacement of some flooring in my basement. On the day the project began, we reconsidered the need for the flooring, and asked if we could cancel that portion of the job. They could not have been more accommodating to that adjustment, and made the change with no questions asked or negative attitude, even though it significantly lowered the price of the project and eliminated a whole day of scheduled work on 2-days' notice. That sort of total customer dedication is rare. I recommend them highly."

"Great guys to work with. Gave us a fair price and had the new water heater installed within a couple hours."

"It went very well. New system installed. They disposed of my old system."

"I texted him and he came out after 30 minutes. It was super quick and amazing. He showed me that it was just a silt underneath the pump and also showed me what to do for future problems. It was a quick job and he's our go to guy for a plumbing work."

"It went very well. Spoke to them one evening and by the next morning, they were here to install the water heater. I appreciated the quick service."

"Oct. 6 2025 it went quick. I received an estimate of The job first. The work was done correctly. It didn't take long. If I need plumbing service again. I would contact Cassidy plumbing & Heating."

"This was a great company needed to grade and prepare a shed site with a foundation. Shawn came out right away for an estimate and cleared the schedule so that the job could be done quickly. All the work was done in one day and the workers were polite and hard working. When they were done they cleaned up the site and Shawn took a minute to explain everything that they did. This was the easiest project I have ever seen a company tackle so flawlessly. I canâ t wait for my next project so that I can hire them again."

Groundworks is the North America’s leading and fastest-growing foundation repair and water management solutions provider. Groundworks is a vertically integrated company with its own manufacturing operations and a world-class software solution, allowing us to serve our customers more effectively. From the first phone call to the annual maintenance offered, our customers have peace of mind knowing we’re there with one mission – to repair, protect and improve their home.

"Very quick response and great communication throughout process. **Unclogged the drain and no upselling**. Very straightforward, honest and fair! Thank you, Lou and your guys!!"