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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon790
    Verified sump pump installation services reviews

Verified Reviews for Sump Pump Installation pros in Darien, CT

*The Angi rating for Sump Pump Installation companies in Darien, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Sump Pump Installation needs.

*The HomeAdvisor rating for Sump Pump Installation companies in Darien, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Sump Pump Installation needs.

Last update on July 16, 2025

Find Sump pump installation pros in Darien

Avatar for Budget Dry Waterproofing, Inc.
Budget Dry Waterproofing, Inc.
4.4(
240
)
Sump Pump or Interior Foundation Drains - InstallSump Pump - Repair or Replace

Serving Darien, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"Inspection of a previously installed sump pump system (primarily the sump pump). Inspection found that it seized up and wouldn't have functioned. Replacement made - and very fortunately - since when the pump is needed, it IS needed. It wouldn't have been good to have a flooded basement or have an upcoming flooded basement."
Drain at base of bilco
going up on the wall
finished wall area
completed
finished sump pump area

+37

Response time1 day
151 neighbors recently requested a quote
Recommended by86%of homeowners
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Avatar for Brian Nisbet Plumbing and Heating
Brian Nisbet Plumbing and Heating
4.9(
378
)
Sump Pump - Repair or Replace

Serving Darien, CT and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Credit card accepted

Customers say: True professional

"Prompt service, arrived on time, installed kitchen faucet/garbage disposal and fixed the leak in the shower. Very impressed with the work."
Response time4 hrs
Response rate88%
Recommended by97%of homeowners
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Avatar for Groundworks
Groundworks
5.0(
12
)
Sump Pump or Interior Foundation Drains - InstallSump Pump - Repair or Replace

Serving Darien, 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

593 neighbors recently requested a quote
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Avatar for Sila Heating, Cooling and Plumbing
Sila Heating, Cooling and Plumbing
4.5(
896
)
Sump Pump or Interior Foundation Drains - Install

Serving Darien, CT and surrounding areas

Approved (Corporate)

In business since 1989

Free estimates

Emergency services offered

"Hello, I just signed the contract with Sila Heating, Cooling and Plumbing on March 27, 2026. I hope everything goes well; I'll let you know at the end, once everything is installed. See you then!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response time10 hrs
Response rate100%
4 neighbors recently requested a quote
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Avatar for Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
4.3(
223
)
Sump Pump or Interior Foundation Drains - InstallSump Pump - Repair or Replace

Serving Darien, CT and surrounding areas

Approved

In business since 1987

Free estimates

Warranties offered

"I really liked CT Basement systems. The sales rep walked me through the process of the basement SaniDry I had installed. When the installer came it turned out that I didn’t need all of the duct work and I was able to save a few hundred bucks. The installer was very professional, neat and helpful . I definitely will hire this company again. Customer service even followed up with me a few days later and had to remind me to register the system (good thing because I had forgotten)."
Finished basement in CT
Basement Finishing in CT
Basement Finishing in CT
Basement Finishing in CT
Basement Finishing in CT

+13

Response time10 hrs
180 neighbors recently requested a quote
Recommended by90%of homeowners
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Avatar for The Builders & Cleaners
The Builders & Cleaners
4.9(
120
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Darien, CT and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Very good service and affordable than you!!!"
Dust out from the ductwork
Dust out from the ductwork
Clean vent
Clean vent
Dust in the return

+1816

Response time1 day
Response rate92%
Recommended by87%of homeowners
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Avatar for E and R Mechanical
E and R Mechanical
4.6(
258
)
Sump Pump - Repair or Replace

Serving Darien, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"Good installation job. Prompt and professional. Charged an extra $50 over estimate for additional proposed install effort."
Water Heater
Water Heater
Water Heater
Water Heater
Water Heater

+6

Response time2 hrs
Response rate93%
130 neighbors recently requested a quote
Request Quote
Avatar for Mike's Plumbing Services
Mike's Plumbing Services
4.3(
206
)
Sump Pump - Repair or Replace

Serving Darien, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Emergency services offered

"Mike was great. He gave a very competitive qoute and took the time to explain the work that he would be doing. He was very professional and helpful from beginning to end. He installed a new Combi Boiler for us in 2 days now we have hot water and heat working perfectly once again. I would recommend Mike for any job."
Boderus high efficiency gas boiler
Boiler
Gas boiler
Shower installation
A/C Install

+5

Response time2 days
1 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for Atomic Rooter Inc
Atomic Rooter Inc
4.5(
126
)
Sump Pump or Interior Foundation Drains - Install

Serving Darien, CT and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+6

Response time8 hrs
Response rate100%
Recommended by85%of homeowners
Request Quote
Avatar for Cassidy Plumbing and Heating, Inc
Cassidy Plumbing and Heating, Inc
4.5(
30
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Darien, CT and surrounding areas

Approved

Super Service Award Winner

In business since 1992

Emergency services offered

Warranties offered

"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."
Heating System
Heating System
Plumbing
The Team
Navien Water Heater

+3

Response time2 days
Response rate100%
12 neighbors recently requested a quote
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Showing 1-10 of 194
Sump Pump Installation questions, answered by experts

A sump pump can be plugged into a regular, 110-volt outlet with three-prong openings, but it must have GFCI protections per the NEC, meaning you’ll need a GFCI outlet and circuit. Sump pumps require two outlet openings, one for the plug to the motor and one for the float switch.

A sewage ejector pump is necessary if you have any plumbing fixtures, such as a bathroom, laundry room, or sink, located below the level of your home's main sewer line. Standard plumbing relies on gravity to move wastewater and solid waste to the municipal sewer or septic tank. However, for fixtures located below grade (e.g., in a basement), gravity is not sufficient.

The purpose of a sewage ejector pump is to actively pump this wastewater and solid waste upward into the main sewer line. Without an ejector pump in this situation, wastewater would have no way to exit and would eventually back up, causing a sewage overflow or flooding in your basement. If all of your home's plumbing is on the main floor or higher, gravity can handle the drainage, and an ejector pump is not needed.

A sewage ejector pump is necessary if you have any plumbing fixtures, such as a bathroom, laundry room, or sink, located below the level of your home's main sewer line. Standard plumbing relies on gravity to drain wastewater and solid waste into the municipal sewer system or a septic tank. For fixtures below this level, like those in a basement, gravity cannot move the waste upward. The ejector pump provides the force needed to pump the sewage up to the main line. Without one, wastewater from below-ground fixtures would back up, potentially causing a sewage overflow and flooding. If all of your plumbing is on the main floor or higher, gravity is sufficient and an ejector pump is not needed.

A small sump pump running infrequently uses an average of 10 kilowatt-hours (kWh) of electricity per month. The average cost for electricity is $0.171 per kWh. The size and use frequency affect how much electricity it uses. Sump pumps average one-third to one horsepower (hp) motors. One hp is equal to 745.7 watts. Watts multiplied by the time your pump is running divided by 1,000 equals your average kWh. Multiply kWh by your average cost of electricity. In areas with high rain or a marsh basin, the average cost can be as high as $15-$25 a month.

Yes, many modern water pumps are designed with energy efficiency in mind. Look for pumps with high efficiency ratings or those with an Energy Star certification. These pumps consume less power and can reduce your utility bills. Additionally, variable-speed pumps are more efficient since they can adjust the flow based on demand, providing significant savings over time.

The Darien, CT homeowners’ guide to sump pump installation services

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

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