Serving Connecticut, Westchester and Putnam Counties

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A Free Estimate!
Products & Services
Basement Waterproofing Services & Products
WaterGuard Interior System
DryTrak Drainage Channel
TrenchDrain Drain Grate
IceGuard Discharge Line
FlexiSpan Wall Crack Repair
Polyurethane Crack Sealing
WellDuct Window Drainage
BrightWall Waterproof Panels
ThermalDry Wall Barrier
Basement To Beautiful Pre-finishing Wall Insulation Panels
Drain Tile Installation
SuperSump Pump System
TripleSafe Pumping System
UltraSump Battery Back Up
Sanidry Basement Dehumidifier
French Drain Alternatives


Crawl Space Repair Services & Products
CleanSpace Encapsulation Vapor Barriers And Liners
Turtl Access Hatch
EverLast Crawl Space Doors
Sanidry Csb Crawl Space Dehumidifier
SmartDrain Water Drainage
SilverGlo Wall Insulation
TerraBlock Floor Insulation
SmartSump Sump Pump
Crawl-o-Sphere Crawl Space Fan
WallCap Block Wall Sealer
SmartVent Flood Vents


Foundation Repair Services & Products
Push Pier Underpinning For Settlement, Foundation Leveling, Sinking Foundation Repair
Geo-lock Wall Anchors
Geo-lock Helical Anchors
PowerBrace Bowed Wall Repair
CarbonArmor Fiber Wall Repair
SmartJack Crawl Space Support
Slab Pier Repair
Foundation Underpinning
EZ Post Deck Repair
Shotcrete Wall Restoration


Basement Finishing & Remodeling
Everlast Wall Panels
Insulated Wall Panels
Premier And Linen Ceiling Tiles: No-sag Warranty
Thermal Dry Floor Tiles
Sunhouse Window Wells
Everlast Window Replacement
Rockwell Basement Egress Windows


Company Awards
2017 Angie's List Super Service Award
Connecticut Basement Systems has been awarded the 2017 Angie's List Super Service Award®! The Angie’s List Super Service Award honors... [Read more]
Larry Janesky award the Valley of Chamber of Commerce's Silver Medal Award
Larry Janesky was awarded the Valley Chamber of Commerce's Silver Medal Award for the Big Build at Ansonia Nature Center!... [Read more]
Best Places to Work
For the 3rd time, Basement Systems has won the Best Places to Work award for being one of the best... [Read more]
More Awards

Stonington, CT's Leading Structural & Crawl Space Repair Company

What made us choose your company was the compelling salesperson, proprietary water-proofing materials and professionalism with which we were treated....
Happy Customers Surrounding Stonington, CT
Work Requests

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Reviews From Stonington
Testimonials From Stonington
Bill was a very good, effecient worker - a nice person and a credit to the company.
Testimonial by David M. from Stonington, CT
Ailton is an outstanding representative of your company. A pleasure to deal with and does an outstanding job...
Testimonial by Timothy R. from Stonington, CT
The job performance was outstanding...
Testimonial by Allan from North Stonington, CT

Stonington, CT's expert in basement waterproofing, foundation repair, & more

Connecticut Basement Systems has been your trusted home improvement company providing reliable basement waterproofing, foundation repair, crawl space encapsulation, basement finishing, and more to over 85,000 Connecticut homeowners since 1987. As a three-time winner of the CT Better Business Bureau's Torch Award for Marketplace Ethics, we are committed to creating an honest and reliable experience with our customers.

Whether you need a moisture-proof basement waterproofing system complete with a sump pump or permanent foundation settlement repairs, we provide these solutions and much more!

Our services in Stonington:

  • Basement waterproofing
  • Foundation repair
  • Crawl space repair
  • Basement finishing
  • Air purifiers
  • And more!

Schedule a free estimate to learn more. Connecticut Basement Systems proudly serves Stonington and areas nearby!

Trusted basement waterproofing company serving Stonington

A wet basement can affect your home more than you think. If left to worsen, water in the basement can cause structural issues, mold growth, pest problems, and more. That is why Connecticut Basement Systems provides patented basement waterproofing solutions, designed to keep your below-grade space dry and healthy for years to come! So, if you're tired of dealing with basement flooding, high humidity, water in basement, or other waterproofing issues, contact our experts today!

Our basement waterproofing services in Stonington:

  • Sump pump installation & maintenance
  • Basement drainage systems
  • Basement Dehumidifiers
  • Basement windows
  • Egress windows & window wells
  • And more!

Since 1987, we have provided warrantied basement waterproofing solutions to Stonington homeowners - this includes sump pumps, basement dehumidifiers, french drains, and more. Schedule a free basement waterproofing estimate to learn more!

Permanent foundation repair solutions in Stonington

No matter how minor your home's foundation problem seems, it is always better to schedule a foundation inspection and get repairs sooner than later. That is because issues like foundation settlement, leaning chimneys, bowing walls, and more can affect your house's value and curb appeal. Even worse, they can create unsafe living conditions for you and your family.

But there is no reason to worry - Connecticut Basement Systems is backed by Supportworks, a nationally renowned network of expert foundation repair contractors. This partnership also gives us exclusive access to professional training, warrantied solutions, and best practices proven by hundreds of dealers across the globe.

Our foundation repair services in Stonington:

  • Slab piers
  • Push piers
  • Helical piers
  • Foundation wall repairs
  • Crawl space support jacks
  • Wall anchors
  • Wall reinforcing systems
  • And more!

Schedule a free foundation repair estimate to learn more. We proudly serve Stonington and areas nearby.

Reliable crawl repair & encapsulation services in Stonington

A nasty crawl space can cause a lot of issues for the home. If left unrepaired and unsealed, the crawl space can start to rot and grow mold, leading to structural issues, unhealthy indoor air, and discomfort throughout the house. That is why Connecticut Basement Systems provides moisture-proof crawl space encapsulations and durable structural repairs.

When we seal the crawl space using a moisture-proof vapor barrier, add a high-performance crawl space dehumidifier, install crawl space jacks for failing support posts, and provide other crawl space repair solutions, we can create a dry, secure below-grade space for years to come!

Our crawl space encapsulation & repair services in Stonington:

  • Crawl space vapor barrier
  • Crawl space drainage system
  • Crawl space dehumidifier
  • Crawl space insulation
  • Crawl space support jacks
  • And more!

Schedule a free crawl space repair and encapsulation estimate to learn more. We proudly serve Stonington and areas nearby.

Transform your home with basement finishing in Stonington

Want to transform your dreary basement into the space of your dreams? From a lavish apartment to a new play area for the kids, Connecticut Basement Systems can help you with these remodeling projects and more - the only limit is your imagination! Unlike other basement finishing contractors, we actually use remodeling products designed to withstand common environmental conditions in the below-grade space, including moisture and mold. Plus, the basement finishing system is warrantied, has insulating qualities, dampens noise, and is eco-friendly.

Our basement finishing system in Stonington:

  • Finished basement flooring
  • Waterproof wall products
  • Ceiling tiles
  • Basement dehumidifiers
  • Replacement windows
  • Egress windows & window wells
  • And more!

Schedule a free basement finishing estimate to learn more. We proudly serve Stonington and areas nearby.

Quality basement waterproofing, crawl space repairs, & more since 1987

Connecticut Basement Systems is the largest basement waterproofing, foundation repair, crawl space encapsulation, and basement finishing company in Stonington - and for good reason. We are committed to improving the lives of our employees, customers, and the world through education and development. For over 30 years, we have built a solid reputation backed by honesty and expertise. So you can have absolute confidence in our services!

Contact us to schedule a free estimate today. We proudly serve Stonington and nearby areas.

Case Studies From Stonington
The windows in this Stonington, CT house were in extremely poor condition. The paint was chipping away from the window frame and the screen was torn...
Job Stories From Stonington, CT
WaterGuard in Stonington, CT

Before we arrived at this Stonington basement, it had water everywhere, making it unappealing and unusable to the homeowner. The homeowner wanted a solution to ensure a waterproofed basement so he could utilize the space. The homeowner did his research and decided to give Connecticut Basement Systems a call for a free estimate! 

Once the homeowner set an appointment, our System Design Specialist, Taz Peterson, arrived the day of the appointment. He concluded that in order to keep the basement dry at all times, a WaterGuard System paired with a SuperSump Pump would fulfill his needs. The homeowner agreed and understood everything that Taz had to say and wanted the systems installed in his basement. With no time to waste, Josh Gomes and his production team quickly went to work.

They installed the WaterGuard system by excavating the perimeter of the basement floors and placing the system underground. Then, they backfilled it with gravel and paved it back up. With the WaterGuard in placed, the SuperSump Pump was placed and installed in order to drain the water caught by the WaterGuard away from the home. The water is pushed through a discharge line and the water is released through a LawnScape.  

With the combination of the 2 products, the basement is staying dry and beautiful all year long and the homeowner is extremely happy!  

Wet Basement? Crawlspace? Give us a call for your free estimate! 1-855-200-7133  

Work Requests From Stonington, CT
Project Location: Stonington, CT
Evaluate crawl space which home inspector found potential mold, mildew and fungus growth. Remediate and perhaps closing off vents and installing commercial dehumidifier.
Project Location: Stonington, CT
Need to survey 2 crawl spaces and advise as to repairs as req'd.
Project Location: Stonington, CT
Crawl spaces in older foundation need floor, wall and ceiling re-insulaton
Project Location: Stonington, CT
Our home was built in 1901, so we have a very old basement. It always smells musty and anything we put down there gets mildewed.
Project Location: Stonington, CT
1000 square foot home in Stonington. Built on ledge with crawl space needing vapor shield.
Project Location: Stonington, CT
Basement leaking water.
Project Location: Stonington, CT
We have a 100 year old basement and a smaller crawl space... seal it, secure it, level the floor?
Project Location: Stonington, CT
Basement has musty smell. Portions are earth.
Project Location: Stonington, CT
Our finished basement has water coming in, we think we need to have a sump pump installed ASAP.
Project Location: Stonington, CT
250 year old house near the water. A small portion remains dirt. Furnace and oil tank located in basenent. Damp and musty. Has French drains and old sump pump. Rising water levels seem to require protective measures
Project Location: Stonington, CT
Water in basement. Also possible need for French drains. Need quote asap.
Project Location: Stonington, CT
I am in need for a small bathroom to include a toilet, shower and small sink to be installed in my basement which is finished.
Project Location: Stonington, CT
I'd like to find out if we are able to finish off our basement and how much it would cost us. Thank you..
Project Location: Stonington, CT
We want to convert our basement into an in-law apt. With two bedrooms, a bathroom , and a Kitchenette. We are new homeowners and it has been a dry summer so we don't know if there are water problems - but it does not appear that there are major issues with leaks.
Project Location: Stonington, CT
We live in a home built in 1840. The basement is very damp. Some of the floor appears to be dirt. There is a hole about 2-3feet in diameter that always has standing water. Looks like it once had a sump pump. It is frankly disgusting and we are unable to really use it for storage. The smell comes up through the door in the kitchen that leads to the basusable. I'm concerned about mold. What are our options for making the space SAFE and/ ousable.I?
Project Location: Stonington, CT
We have a 35 year old ranch home that about 6 years ago had a basement flood as result of a very heavy rain event. When the home was built there were concerns about the water table so curtain drains were put in but no sump hole. We never had a problem in that time but about a year before the flooding a home was built next to us in which tons of fill was hauled in to build a driveway over wetlands and many trees removed from that property. Since that time we have periodically had basement flooding with spring rains and have had to pump it out. We have had landscaping work done with downspouts rerouted away from the house in an attempt to resolve the issue but it seems to be getting worse. There now are noticeable cracks in the walls and floor of the basement with water most noticeably coming thru those but also seems to seep in everywhere. With the unusual winter driving rain storm a few weeks ago we had flooding again and pumping was very difficult due to the cold weather that followed freezing hoses. We had someone come and pump it out but some puddles remain. We realize that we need to do something about it and would like to have you take a look at it and give us an estimate of what it would entail.
Project Location: Stonington, CT
Need estimate for sealer around basement floor - between the stone foundation and the floor.
Project Location: Stonington, CT
Hi, would like to remodel the basement but I have leak perhaps in two places. Would like you to visit, evaluate and offer an estimate. Thank you!
Project Location: Stonington, CT
Need quote for french drain; old home with stone foundation. At least half of basement needs slab poured as well.
Project Location: Stonington, CT
Back up sump pump system purchase and installation