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TRUSTED BY CORNWALL, CT HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon118
    Verified sump pump installation services reviews

Top-Rated Sump pump installation pros in Cornwall - Updated Nov 2026

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

Serving Cornwall, CT and surrounding areas

Approved

In business since 1987

Free estimates

Warranties offered

"I posted an initial review on 2/21/19 on a job done on 1/11/19 to fix groundwater from coming into our basement. The drainage system and sump they installed was not collecting all the water that was coming in, as we had leaking from several areas along an uneven rock ledge. I had reached out to our salesperson by phone and email and never heard back, so I was very frustrated. About 3 weeks after I posted the review, I did get a call from Jeff Allen, one of the supervisors. To make a long story short, he sent out one of their waterproofing specialists to look at the problem. We had already hired an independent mason to try to remedy the problem but he had not yet had a chance to do the job. Jeff convinced me that CT Basement systems would do absolutely whatever it took to fix my water problem. I cancelled the independent mason. Danny, a mason from CT Basement Systems came out and used a very ingenious method to divert all the water to the originally installed water guard trough and then to the sump. It is working beautifully!! I think Danny is a genius and I am so impressed and thankful for Jeff's perseverance and kindness in making this happen. I am now a very happy customer."
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+12

176 neighbors recently requested a quote
Recommended by90%of homeowners
Premium Northeast Plumbing LLC
4.9(
4
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Cornwall, CT and surrounding areas

Approved

In business since 2023

Credit card accepted

Customers say: Quality work

"I gutted the master bathroom and redid it, hired Premium Northeast Plumbing to do all the plumbing work. Andrew the owner is awesome, professional, knowledgeable, personable and punctual. I would strongly recommend this company for any plumbing work."
Response time1 day
8 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for M & M Construction LLC
M & M Construction LLC
4.6(
76
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Cornwall, CT and surrounding areas

In business since 1965

Free estimates

Credit card accepted

"Excellent work.  Was refreshing to work with a contractor who did the simple things such as showing up when they said they would, completing work as specified, completing in a timely fashion and communicating all along.  AJ was great to work with and originally came out for drainage work and tying our sump pump discharge into buried PVC pipe to drain in the backyard away from the house.  We were also in process of running a gas line to the house and when asked if they'd be interested in excavating the trench, which was no small task at ~450 ft along driveway and several trees/stumps/rocks, AJ was more than willing to take on the job.  AJ coordinated with the gas company and dug the trench per their specifications and backfilled with sand all within a couple of days.
Once the gas line was installed, AJ and his team completed the drainage work which consisted of tying in sump pump discharge, three gutter downspouts and a yard drainage box to pick up excess surface water at a low spot near driveway.  The discharge was run approximately 100 ft to the rear of our yard and a pop up emitter was installed to keep all water away from the house.  All excavation was backfilled and top soil added and graded with seed and straw laid.  Grass seed began coming up within a week and has filled in nicely.  
Throughout the process AJ kept in contact with what was going on and what they would be doing next.  The work was completed faster than we anticipated and the crew kept the site clean each day when they were done.  AJ went out of his way to make sure we were happy with the work and made sure the job was completed to satisfaction including following up with me to make sure we were happy after the job was complete and he had already been paid.  The crew was great, worked hard and put in a full work day and then some everyday.  The were several challenges with this job including a tight work space with many trees, roots and rocks.  The crew took great care to make minimal disturbance to surrounding trees, shrubs, etc.  We were very happy with AJ and crew and would happily use them in the future especially considering the reasonable price.  We even had the neighbors comment on the quality of the work done and how fast the work was completed.
"
Blue stone 1
Blue stone 2
Retaining Wall (Before)
Retaining Wall (After)
Channel Drain

+26

Recommended by93%of homeowners
Avatar for The BullBag
The BullBag
5.0(
15
)
Sump Pump or Interior Foundation Drains - Install

Serving Cornwall, CT and surrounding areas

In business since 2001

Credit card accepted

"It went WELL! These guys are huge helps! They arrive faster than promised, they charge what they promise. There are no surprise charges like with a dumpster! I am now using a BullBag in CT and one in RI. I, alone, can keep this company busy!!!! They are awesome to work with! I HIGHLY RECOMMEND THEM! One of their managers, Vicki, was so nice, pleasant and patient with me. I was frazzled with all of the damage my property received from the hurricane. She was great!"
The BullBag truck in MA
The BullBag truck in NY
Toys for Tots
Recommended by100%of homeowners
Avatar for EASTERN WATER SOLUTIONS
EASTERN WATER SOLUTIONS
4.6(
12
)
Sump Pump - Repair or ReplaceSump Pump or Interior Foundation Drains - Install

Serving Cornwall, CT and surrounding areas

In business since 1966

Emergency services offered

Credit card accepted

"Tony and his crew saved us! Tony returned my call for consultation and repair need and came with his crew in a timely manner. They diagnosed the problem carefully and ordered the pump we needed and replaced the damaged one before the Christmas holiday. We were very grateful and really appreciated their professional manner at all times and their much needed experience. I highly recommend this company to anyone!"
Recommended by91%of homeowners
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Sump Pump Installation FAQs, answered by experts

Sump pumps prevent basement flooding, reduce humidity, and protect against water damage.

Grinder pumps alone cost $300 on average. The average cost to install a new grinder pump is between $2,000 and $4,000, including the pump and labor. This price can also change based on the exact type of grinder pump you choose, labor costs in your area, and the power system your home currently has.

Every three to four months, you should clean any dirt and debris off of your sump pump. You should also check the inlet screen (at the bottom of the pump) to make sure that it isn’t blocked. On top of that, you should deep clean your sump pump once per year—or hire a sump pump pro to do it for you.

DIY is possible for simple repairs. Professional services ensure proper diagnostics and long-term reliability.

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 Cornwall, 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.