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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon971
    Verified foundation drain installation services reviews

Top-Rated Foundation drain installation pros in Cos Cob - Updated Nov 2026

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

415 neighbors recently requested a quote
Avatar for AG Property Maintenance, LLC
AG Property Maintenance, LLC
4.6(
12
)
Foundation Drainage - Install or ReplaceSump 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
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Ron's Masonry
Ron's Masonry
5.0(
30
)
Concrete Foundation - InstallFoundation Drainage - Install or Replace

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1995

Emergency services offered

Small jobs welcome

"The communication and scheduling of the project was on point and everything was explained and done as explained. He even did extra that I didnt expect. I respect and appreciate. Thank you, DH"
Walkway
Steps
Footing
Walk
Walk

+36

Response time1 day
Response rate86%
27 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
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+41

1 neighbors recently requested a quote
Recommended by44%of homeowners
Avatar for AA Outdoor Services, LLC
AA Outdoor Services, LLC
3.9(
33
)
Concrete Foundation - InstallFoundation Drainage - Install or Replace

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1990

Free estimates

Small jobs welcome

"Vincent knows the cement business. I learned a lot from him. He replaced old cement floor and driveway. He works hard for his customers even weekends when circumstances dictate. I plan to hire him again to install patio stone when I choose the material and design."
Driveway in New Haven (West Haven)
Rear entrance and parking area (West Haven)
Rear entrance and parking area (West Haven)
Step repair (West Haven)
Step repair (West Haven)

+61

Response time9 hrs
Recommended by100%of homeowners
Avatar for Atomic Rooter Inc
Atomic Rooter Inc
4.5(
126
)
Sump Pump or Interior Foundation Drains - Install

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"Steven was the absolute best… arrived at the very start of only a two hour window, fixed the problem in about an hour. Very polite and courteous. I called three plumbers and he was the first to call me back and the only one who would give me a ballpark figure over the phone. The others wanted to come out and have a look for $70. even though I accurately described the job in detail. I’m thrilled to have a reliable plumber! A more than satisfied customer, Lora Harrigan"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+6

Response time8 hrs
Response rate100%
1 neighbors recently requested a quote
Avatar for Dirty Deeds Basement Waterproofing
Dirty Deeds Basement Waterproofing
5.0(
4
)
Foundation Drainage - Install or Replace

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Dean, the owner of Dirty Deeds, is a true professional. From a by-gone era, he is a man who cares about his customers problems
and takes pride in solving them to everyone's satisfaction.
 
  Dirty Deeds was at the low end of the estimates we received for installing a French drain in our basement. Dean was
"hands-on" during the entire process, working along with his crew to both install the system and clean-up afterwards.
He personally returned at least twice to check that everything was working properly.
 
 Without hesitation I can recommend that anyone looking to "fix" their water leakage and wet basement problems, call Dirty Deeds as the first step towards a successful resolutioin of their problems.
"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+24

Response time7 hrs
7 neighbors recently requested a quote
Recommended by100%of homeowners
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Showing 1-10 of 348
Foundation Drain Installation FAQs, answered by experts

If you hire a professional, installing a new sewage ejector pump costs $850 to $3,500, or an average of $2,300. Otherwise, if you handle the installation yourself, you can expect to pay $500 to $1,000 for the sewage ejector pump, permits, and other supplies required for this DIY project.

Almost any kind of home can have a wine cellar or cabinet installed. You’ll need an area where a concrete floor can be put in, along with the necessary insulation, climate control, and ventilation systems. If you think of yourself as an aspiring sommelier, an underground wine cellar may be ideal, but it will cost significantly more. 

What you choose to install really depends on your budget and how many bottles you’re looking to store.

French drains, sump pumps, and exterior waterproofing systems are common options. Choose one that best suits your property’s needs.

Yes, many contractors offer warranties for their work. Confirm terms before starting the project.

Yes, it is generally unhealthy and can be dangerous to live in a damp basement. The damp air can negatively affect your breathing and lungs, and the moisture promotes mold growth and pest infestations. Inhaling mold spores or waste particles from insects and rodents attracted to the moisture can be hazardous. This damp, moldy air can also circulate into your main living area. It is crucial to resolve any moisture problems and implement preventative measures before using your basement as a living space.

The Cos Cob, CT homeowners’ guide to foundation drain installation services

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