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Find Sump pump or interior foundation drains installers in Cos Cob

Avatar for Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
4.3(
589
)
Sump Pump or Interior Foundation Drains - Install

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1987

Free estimates

Warranties offered

"We moved into a lovely house with many unsuspected problems including a very wet basement back in Nov of 2017. I did much research to find the best outfit to fix the problem. Ct Basement was not the cheapest. In fact, they were the most expensive by far. But, they were also the yardstick every other company compared themselves to. The job cost us 19,300. And we had to wait weeks for the work to start. BUT, everything went perfectly. As soon as the old debris was removed, I was shocked to find that the garbage of the old walls and flooring they removed had black mold under it. And, with its removal, my wife’s athsma cleared up and left town! They did a beautiful job, were very polite and the new installed basement, new sump pump with back up battery, perimeter trench, flooring, etc., all is great. They put a lot of work and material in to do this job with very skilled workmen who worked very hard. Sometimes you get what you pay for."
Additional Photos
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+12

160 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Groundworks
Groundworks
4.9(
13
)
Sump Pump or Interior Foundation Drains - Install

Serving Cos Cob, CT and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2025

Free estimates

Warranties offered

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. For state licenses visit Groundworks.com/licensing

Foundation
Foundation
Foundation
Concrete
Concrete

+16

573 neighbors recently requested a quote
Avatar for Aldos plumbing
Aldos plumbing
5.0(
35
)
Sump Pump or Interior Foundation Drains - Install

Serving Cos Cob, CT and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

"Aldo responded quickly. He stopped by and gave me an estimate to install a new faucet in a bathroom, and fix a minor leak with a toilet. He offered to do both jobs immediately. Nice clean job."
Additional Photos
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Additional Photos

+41

1 neighbors recently requested a quote
Recommended by44%of homeowners
Avatar for AG Property Maintenance, LLC
AG Property Maintenance, LLC
4.6(
12
)
Sump Pump or Interior Foundation Drains - Install

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2012

Free estimates

Offers commercial services

"Pedro and team solved an ongoing pond drainage issue that was able to be resolved. Many companies came and charged us money for half a job and this was not the case with AG. They were professional, proficient and quickly got to the source of the problem in one day. Prices were fair and they did not have to come back as they had all the supplies they needed to start and finish the job which is very rare for a major culvert issue like this one."
Brookfield ct
Brookfield ct
Brookfield ct
Brookfield ct
Brookfield ct

+4

Response time2 days
2 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for L.C. Schede & Sons, Inc.
L.C. Schede & Sons, Inc.
4.0(
294
)
Sump Pump or Interior Foundation Drains - Install

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1922

Free estimates

Emergency services offered

"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."
 $100,000 Kitchen
Master Bath/Spa
Children's Bath
Guest Bath
Response time6 hrs
16 neighbors recently requested a quote
Recommended by88%of homeowners
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FAQs for sump pump or interior foundation drains installation projects in Cos Cob, CT

Most residential pumps draw approximately 1,300 to 2,900 watts when they first start, then settle at roughly 800 to 1,050 watts during normal operation. The exact number depends on the motor’s horsepower and how often the float switch tells the pump to run. Even at the high end, the electricity cost is minor compared with the expense of cleaning up a flooded basement.

Grab a ruler and an empty 18‑inch‑wide pit. During a steady rain, time how much the water rises in one minute. Multiply that depth (in inches) by 60 to calculate gallons per hour, then add 50% for safety. If the result tops 2,100 gallons per hour—about 35 gallons a minute—you’ll need a 3/4‑horsepower unit. Anything lower, and a 1/3- or 1/2-horsepower pump should do the trick.

Loud rattling, constant cycling, or shuddering vibrations are the pump’s way of telling you it’s on its last legs. Musty smells, higher electric bills, and visible rust are other red flags. If the unit is 10 years old or older and exhibits any of these symptoms, replace it before the next heavy rain turns your basement into a wading pool.

You don’t have to hire a licensed plumber, but you should still bring in someone who installs sump pumps for a living—whether that’s a plumber, basement‑waterproofing specialist, or experienced handyman. They know the local codes, can wire the pump safely, and will test the system before they leave. Skipping professional help might void the warranty and could leave you with a pump that fails when you need it most.

Not every basement needs a pump, but if your home sits in a floodplain, has a high water table, or has ever taken on water during a storm, a sump pump is inexpensive insurance. For basements that only struggle with condensation or the occasional damp spot, sealing cracks and improving drainage may be all that is needed.

The Cos Cob, CT homeowners’ guide to sump pump or interior foundation drains installations

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