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    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

427 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

"Someone called back right away and schedule to come to our home at 10am. They were 4 hours late. Two guys, one seem to be professional and knew what he is doing. They checked 3 bathrooms and drain pipe, and suggested I replace the flappers, seal one of the toilets, and put epoxy around the possible crack in one of the drain pipes. The whole job took less than an hour and cost me 620 dollars. I am new a home owner and don't have much experience, and I did not request a quote in writing, but I was told in the beginning that smoke test will cost 550, if it comes to it. They did not do it. I feel they used my inexperience to gain. Not to mention, that the problem of smell remained unfixed and I did not see any changes in how toilets work."
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

Whether professional drainage installation is covered by insurance depends on your specific policy and the circumstances. In some cases, homeowners insurance may cover the cost if drainage problems pose a risk to your home's foundation or structural integrity. However, it's essential to review your insurance policy, understand the terms and conditions, and consult with your insurance provider to determine if your particular situation qualifies for coverage. Coverage may vary, so it's crucial to clarify the details with your insurer.

Not all window wells have a formal drain, but they all require a method for water to flow away from the window. Some wells are connected to an interior or exterior drain tile, which is the most effective solution. Others rely on a deep layer of gravel or crushed stone that allows water to filter down into the soil.

However, if a window well lacks a proper drainage system, it can lead to basement seepage, costly water damage, mold growth, and potential foundation damage. This is especially true in areas with heavy rainfall or expansive soil.

If your window well doesn't have a drain or is not draining quickly enough, you have a few options. For gravel-based systems, the stone may have compacted and needs to be improved. For a more robust solution, you can hire a plumber or window installer to connect the well to a drainage system. This can also be a DIY project using a shovel or auger.

Yes, many people choose to bury their sump pump discharge pipes. When you leave the pipe visible in your yard, you might trip over it or accidentally damage it with your lawn mower. Plus, from an aesthetic perspective, hiding the discharge line underground looks nicer than leaving it out in the open. Before burying a sump pump pipe, review your local building codes to make sure your installation is compliant.

Sump pumps remove excess water from the lowest point of your home, which prevents flooding. When a sump pit fills with water, a sump pump pushes that water outside of the basin and into an exterior discharge pipe. From there, the water flows away from your home, so it doesn’t damage your foundation.

The cost to install a new sump pump, including materials and professional labor, typically ranges from $1,000 to $3,000. The average cost is often cited between $1,200 and $2,500. Several factors influence the final price, including the type of pump, the complexity of the drainage system, and the installation location. For instance, installing a sump pump in a basement may cost around $1,200, while a more complex installation in a crawl space can cost an average of $3,900. It is important to hire a licensed professional for the installation to ensure quality work, which can impact the pump's lifespan and warranty. Note that these costs are for a new installation; replacing an existing unit is less expensive, typically costing $308 to $748.

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.