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


Before and After Pictures from Groton
CleanSpace Liner in Noank, CT

CleanSpace Liner in Noank, CT

Before After
CleanSpace Liner in Noank, CT CleanSpace Liner in Noank, CT

Before, this crawl space was dirty and filled with moisture which impacted the rest of the home. The dirt was unpleasant and the moisture was starting to grow mold. The homeowner was concerned for the filthy and unhealthy crawl space. He decided to contact the experts at CT Basement Systems.

Now, the crawl space is a more clean and healthy environment! CleanSpace liner was installed on the floors of the crawl space to prevent moisture to the area. Rim joist insulation was also installed to prevent unwanted air flow from coming through. This is exactly what the homeowner had wanted and is pleased with his transformed crawl space.  

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

Stress-Free Crawl Space & Basement Repair in Groton, CT

The office staff was excellent. The specialist was very professional and the crew worked very hard; they did a great...
Happy Customers Surrounding Groton, CT
Work Requests

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Reviews From Groton
Testimonials From Groton
These folks are friendly to work with, timely, do an excellent job and their clean up after the work is done...
Testimonial by Priscilla N. from Groton, CT
After twelve years and three floods later, you have no idea how much inner peace my wife and I both have...
Testimonial by Rev. J. from Groton, CT
We write to commend your workers. The stabilization of our home required 15 piers, only 4 of which were...
Testimonial by Peter M. from Noank, CT

Groton, 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 Groton:

  • 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 Groton and areas nearby!

Trusted basement waterproofing company serving Groton

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 Groton:

  • 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 Groton 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 Groton

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 Groton:

  • 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 Groton and areas nearby.

Reliable crawl repair & encapsulation services in Groton

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 Groton:

  • 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 Groton and areas nearby.

Transform your home with basement finishing in Groton

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 Groton:

  • 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 Groton 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 Groton - 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 Groton and nearby areas.

Work Requests From Groton, CT
Project Location: Groton, CT
Need to find a way to get humidity out of my basement/ first floor walk out
Project Location: Groton, CT
Would like to water proof basement.
Project Location: Groton, CT
Our home is built on a crawl space, which is damp and very humid. Would like to discuss encapsulation/vapor barrier/ dehumidification. Thank you.
Project Location: Groton, CT
Holes in foudation looks like a pipe once went through. Sloping floors. Falling insulation, Two casement windows dont open and may need replacement.
Project Location: Groton, CT
Need a quote to have crawl space under sun room insulated
Project Location: Groton, CT
We just bought a 115 year old house and the housing inspection suggested we have some things looked at. I can send a copy of that if needed. The floor in the living room sags quite a bit though this has been reinforced, we were considering jacking it up more to level the floor in the living room... we would like an estimate on a few things (like leveling the living room and adding reinforcement to other areas) so that we can determine by cost and imperative-ness if you will, what fixes we will make.
Project Location: Groton, CT
General mustiness
Project Location: Groton, CT
Bathroom floor foundation.
Project Location: Groton, CT
Home inspection results, our sump pump discharge is an issue.
Project Location: Groton, CT
Partially finished basement with potential. Trying to maximize space we have before considering adding additional space on
Project Location: Groton, CT
I need help with properly supporting a mobile home/foundation.
Project Location: Groton, CT
1200 sf basement needs french drains
Project Location: Groton, CT
I would like to have my basement waterproof and finished.
Project Location: Groton, CT
Crawl space / 1/2 cellar is damp and uninsured. Stone foundation and hatchery entry needs repairs. No insulation currently in the cellar.
Project Location: Groton, CT
I am buying a house that has a crawl space which has some improper mitigations so suspected to have problems. Looking for an evaluation for an encapsulation, entry bulkhead, and recomendations for drainage, insulation, or other recommended services.
Project Location: Groton, CT
Walls/floor settling. Need new piers installed to level floor. 650sq ft house with dirt crawl space.
Project Location: Groton, CT
Recently came to our attention that underneath basement floor has been washing away.
Project Location: Groton, CT
Old house, Beneath basement floor soil washing away.
Project Location: Groton, CT
Looking for solution to potential water in basement.
Project Location: Groton, CT
I would like an estimate on fixing some leaks in my foundation. What do you use to fix them. Thanks