Serving Connecticut, Westchester and Putnam Counties

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Reviews From Columbia
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
ThermalDry® Elite Plank Flooring
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

Your Respected Columbia, CT Basement Waterproofing & Crawl Space Repair Contractor

George did a very nice job!...
Happy Customers Surrounding Columbia, CT
Work Requests

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Columbia, 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 Columbia:

  • 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 Columbia and areas nearby!

Trusted basement waterproofing company serving Columbia

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 Columbia:

  • 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 Columbia homeowners - this includes sump pumps, basement dehumidifiers, french drains, and more. Schedule a free basement waterproofing estimate to learn more!

Transform your home with basement finishing in Columbia

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 Columbia:

  • 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 Columbia and areas nearby.

Permanent foundation repair solutions in Columbia

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 Columbia:

  • 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 Columbia and areas nearby.

Reliable crawl repair & encapsulation services in Columbia

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 Columbia:

  • 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 Columbia 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 Columbia - 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 Columbia and nearby areas.

Job Stories From Columbia, CT
Everlast Wall Restoration in Columbia, CT

In a Columbia, CT house, a family was having trouble with water ruining some of their basement walls. Some walls had been so badly damaged from the water that they turned black with mold covering it. Once the family decided to take action to replace these walls, they called us in order to rid their family space or harmful and pungent mold growths.

Once it was time for the appointment, our salesman suggested that Everlast walls would be the perfect replacement for having a beautiful new look in the basement, as well as keeping mold from growing through the walls. The salesman described to the homeowners that the inorganic fibers that make up our Everlast walls makes it so mold cannot grow or live on the walls, and that the walls are also moisture and water resistant.

For this family's problem, we had the perfect solution, and they thought the same thing. Once a price was agreed upon, our installation crew got to work removing the old and moldy walls from the Columbia basement, and installed the new and beautiful Everlast wall pannels. This completely changed this basement from a water damage AND an aesthetic perspective. The family was thrilled with their new basement walls and were grateful for our solutions and strive to help families such as them.

Everlast Wall Restoration in Columbia, CT - Photo 1
Waterproofing Transformation in Columbia, CT

These homeowners in Columbia, CT had an ongoing water problem in their basement. They had water coming in through the walls, and from the space where it met the floor. They gave us a call at Connecticut Basement Systems to come check out the problem, and we were happy to offer them a solution! Our expert foreman Kryz Wilk came in, and got the job done! He installed our patented WaterGuard drainage system, to make sure all the water coming in was collected. To collect the water from the drain system, our premier sump pump, The SuperSump, was installed. The pump is capable of pumping out 2,200 gallons of water per HOUR, so the family never has to worry about water flooding their home. This family can feel comfort in knowing their basement will be dry from now on!


Work Requests From Columbia, CT
Project Location: Columbia, CT
Water in the basement
Project Location: Columbia, CT
Looking to renovate a space in our basement into a finished space. Concerns would be little leaking, and well pump in same room.
Project Location: Columbia, CT
Hello, My basement constantly floods. I'm always setting up pumps, dragging hoses out the window, and then having to monitor those pumps so they don't burn out. It is basically unusable space due to the constant water and associated mold. I recently pulled out walls so most of it is down to the concrete and open rafters. I'm nervous about what is above and below a small section that has a subfloor and ceiling, so I left those in place. I would like a completely waterproof solution and have it finished so I can use it for laundry/storage/work area/living space (tv/couch/etc.). Regards, Drew
Project Location: Columbia, CT
In the summertime, my basement gets damp. I would like to maintain the space between 45 and 55% RH, but my off-the shelf dehumidifier will not keep up with the demand.
Project Location: Columbia, CT
Water leak in basement and poor sump pump system currently in use.
Project Location: Columbia, CT
W\e have lived in this home for 16 years and this past week was the 2nd time we had some flooding in our basement. We have never caught it coming in just found it after the fact. Not sure where it is coming in. Would appreciate your advise. Thank you.
Project Location: Columbia, CT
Damp basement with mold concerns.
Project Location: Columbia, CT
Extremely dusty semi-finished basement with some mold and wetness / need extensive cleaning / removal of some fixtures / recommendations for possible sump pump / need basement sink and hook up / looking for cleaner air in house / plugging up all holes that mice could enter / removal of some walls
Project Location: Columbia, CT
I have an old house (1860) with pebble stone basement floor and granite foundation. It is constantly wet due to water leak and rise and is creating mold.
Project Location: Columbia, CT
Small leaks in foundation and water leak in clean out hole behind oil furnace.
Project Location: Columbia, CT
Finish a basement
Project Location: Columbia, CT
Water in basement
Project Location: Columbia, CT
Have water leaking into basement at the moment. Have made some preventative measures because this has happened in past, but we want some estimates for permanent solutions to this issue.
Project Location: Columbia, CT
Interested in finishing basement.
Project Location: Columbia, CT
Have a crack in basement floor that seeps in a little water.
Project Location: Columbia, CT
1000+ sf of basement space Wants: 1) Bedroom w/ Large Closet, Bath w/ stand-up shower, & Media room. Also, Tiny Kitchen space (Single countertop & Sink) Issues: Contemporary design, multi-level ceiling, a lot of posts in odd locations. Currently available for Visit - Quote on Monday 10/13