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TRUSTED BY DARIEN, CT HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon74
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Darien

Avatar for American Dry Basement Systems, LLC
American Dry Basement Systems, LLC
4.9(
118
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Darien, CT and surrounding areas

Approved

In business since 1997

Free estimates

Credit card accepted

"I had a great experience with American Dry Basements. From start to finish, their team was professional, knowledgeable, and easy to work with. They took the time to explain everything clearly and made sure the job was done right the first time. What really stood out to me was their fair and affordable pricing—no surprises, just honest work at a reasonable cost. It’s not always easy to find a company that combines quality service with good value, but they definitely delivered on both. If you’re looking for reliable basement waterproofing with a team you can trust, I highly recommend giving them a call."
Drainage Trench
Jackhammer
Mixing SuperCrete
Compress Wash Stones
Spreading SuperCrete

+7

Response time11 hrs
10 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for The Builders & Cleaners
The Builders & Cleaners
4.9(
120
)
Basement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Darien, CT and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"My husband and I reached out to the company to repair some rotten boards we discovered on the exterior of the house. We spoke to David who was extremely responsive and quick to set up our services. The crew came a couple days later right at the time they said, the repairs are great quality, and everyone we interacted with was polite and kind. I wouldnâ t hesitate to hire them for a bigger job in the future!"
Dust out from the ductwork
Dust out from the ductwork
Clean vent
Clean vent
Dust in the return

+1821

Response time1 day
Response rate92%
Recommended by87%of homeowners
Avatar for Groundworks
Groundworks
4.9(
13
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

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

641 neighbors recently requested a quote
Avatar for KNL CONSTRUCTOR LLC
KNL CONSTRUCTOR LLC
5.0(
11
)
Basement Drainage Channels - Install

Serving Darien, CT and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

*****Call Today for an Estimate @ 475-279-4864***** With over 10 years of experience, I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!

Pavers
Pavers
Concrete Border
Concrete Border
Bluestone

+2

11 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Cassidy Plumbing and Heating, Inc
Cassidy Plumbing and Heating, Inc
4.5(
31
)
Basement Drainage Channels - Install

Serving Darien, CT and surrounding areas

Approved

Super Service Award Winner

In business since 1992

Emergency services offered

Warranties offered

"I had lost water pressure on Saturday and made a emergency call to a unknown company from google. I talked to a person immediately from Cassidy Plumbing and was told I would get a call from an employee in one hour. An employee called and would come over in 15 minutes. I was amazed at the response time. He check out my water system thoroughly and told me that I wasn't getting water in the well tank causing me to lose pressure but also I was not getting any pressure straight from the well either. It was either the water pressure tank with the pressure switch or the water pump that was causing this problem. The pressure gauge was also broken. He explained fully what needed to be done, the price for each issue and since he was not able to do anything until Monday, I was first on the list.
Cassidy Plumbing called me in the morning and told me that they would be their in one hour. They came promptly and went to the well tank first and found out the pressure switch had corroded and the well tank was also not doing it's job. The tank was about 15 years old and the switch was more than 25 years old. I was told and saw everything that needed to be replaced and the price. When replacing the valve close to the water filter housing the piping broke off and upon looking at it this was corroded too! I was able to get a discount for the water filter housing since they were working on that section of piping and it was unexpected. Afterwards they tested the water pressure to make sure all was working and that the register near the pressure switch was functioning.
My water room is the size of a closet. Inside is the water heater, water softener system (tank for salt and two tall cylinders), electrical box, telephone box, cast iron plumbing for toilet and the well tank. It was tight to say the least and they did a neat job of putting everything together and cleaning up.
I have had to replace my well pump and another time the electrical wiring to the pump and both these companies could not compare to the professionalism and services that Cassidy Plumbing and Heating."
Heating System
Heating System
Plumbing
The Team
Navien Water Heater

+3

Response time2 days
Response rate100%
15 neighbors recently requested a quote
Avatar for TITO'S HOME IMPROVEMENT CONTRACTORS
TITO'S HOME IMPROVEMENT CONTRACTORS
4.1(
25
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Darien, CT and surrounding areas

Approved

Customers say: Super punctual

"The price was competitive, work was done ahead of time as additional workers were added to the job as rain and snow was in the forecast. Clean up was performed at the end of each day. Interior ceiling from roof leak was repaired and painted. Workers were polite, respectful and answered all questions."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+25

Response time9 hrs
1 neighbors recently requested a quote
Recommended by90%of homeowners
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Basement Waterproofing questions, answered by experts

The most flood-resistant materials you can count on in a flood scenario are concrete, closed-cell insulation, foam insulation (also known as expandable foam), pressure-treated wood, marine-grade plywood, and ceramic tile. When a material is flood-resistant, it can withstand direct contact with floodwater for at least 72 hours without being significantly damaged.

It is better to have a crawl space that is tailored to the outside temperature, your needs, and the season. For example, it is much better to have a vented space when it’s very hot outside and your AC bills are sky-high. Conversely, when the temperature drops and humidity rises, it is almost always better to have your vents shut and covered if possible.

Yes, you can technically make a crawl space liveable, but the only way to do so is by converting it into a basement. While some crawl spaces are big enough to walk through and store large items, they lack appropriate insulation and space to be liveable.

You should plan on waiting at least a year and ideally two to three years after construction before finishing your basement. This will give the foundation time to settle in response to the weight of your home and the expansion of the surrounding soil. You can then repair your foundation and seal any cracks as needed before finishing it to reduce your risk of future leaks or other issues.

Basements are commonly converted into game rooms. The potential challenges you may run into include controlling moisture, working with low ceilings, limited natural light, and the need for additional electrical or HVAC work. Addressing these issues can add to the total cost, but it ensures a comfortable and functional space.

The Darien, CT homeowners’ guide to basement waterproofing services

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