Get matched with top sump pump or interior foundation drains installers in Cos Cob, CT

"We had a clog in our outside sewage drain and it was snaked and video recorded for $83."

"After Hurricane Sandy, we had our sump pump system with a battery backup expanded a few years ago with additional curtain drains added. The price was reasonable and they did not try to sell extras that other companies tried to sell. We have the system and battery serviced once a year. They keep to their appointments times."

"Aldo was very professional and on time. Did an excellent job with my plumbing issue. Would recommend to anyone."

"Easy process from quote to work complete. The crew worked on a few small projects -- fixed a damaged wall, repaired flooring, and installed a new toilet."

"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."

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

"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."

"Technician was on time and completed the sump pump replacement is less than 1 hour. Cost of sump pump seemed high when compared to sump pump prices at Home Depot and Lowes."

"I hired Candito Plumbing to come out and inspect my AC unit and the guys did a good job."

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.