Serving Connecticut, Westchester and Putnam Counties

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Reviews From Harwinton
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

Harwinton, CT Foundation Repair & Basement Waterproofing Experts

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Happy Customers Surrounding Harwinton, CT
Work Requests

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Harwinton, 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 Harwinton:

  • 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 Harwinton and areas nearby!

Trusted basement waterproofing company serving Harwinton

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 Harwinton:

  • 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 Harwinton 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 Harwinton

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 Harwinton:

  • 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 Harwinton and areas nearby.

Reliable crawl repair & encapsulation services in Harwinton

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 Harwinton:

  • 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 Harwinton and areas nearby.

Transform your home with basement finishing in Harwinton

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 Harwinton:

  • 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 Harwinton 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 Harwinton - 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 Harwinton and nearby areas.

News & Events from Harwinton
Is Your Home Santa Ready?
Christmas is steadily approaching, which means Saint Nick is getting ready to pay a visit to your house. Follow our tips to make sure the big guy feels comfy when he arrives!... [Read more]
Work Requests From Harwinton, CT
Project Location: Harwinton, CT
My Basement has taken on ground water the last two storms. It has never has a drop of water previously. I need to make sure my basement stays dry and want to ensure no further damage happens.
Project Location: Harwinton, CT
Moldy wet basement
Project Location: Harwinton, CT
We have a problem with moisture in the basement. Currently, we have a Santa Fe dehumidifier that was installed 10+ years ago but has since stopped working. We are looking for a replacement or a better solution.
Project Location: Harwinton, CT
I would like to finish my basement. It does have a sump pump and re run a dehumidifier often.
Project Location: Harwinton, CT
A dining room corner is sinking in my 1874 house. There are gaps in my support beams in the basement. I recently purchased the house, and I get the sense that it might need additional supports or a review of the current supports/beams.
Project Location: Harwinton, CT
Basement built on ledge. Get water in during heavy storms. Want to waterproof and make basement a more useful area than a catch all damp area.
Project Location: Harwinton, CT
Hi, We had pretty significant (8-9 inches) flooding in our basement following the recent storm. Our basement currently does not have a sump system. I'm curious about what systems would be recommended to address this issue, and how much we could expect to spend.
Project Location: Harwinton, CT
We're interested in finishing our basement.
Project Location: Harwinton, CT
Mold, moisture and dirt basement
Project Location: Harwinton, CT
Basement appears dry but it is a concrete block foundation and there is a drain around the edge of floor that seems damp. Room was finished at one time but walls were moved to do re-wiring. My client wants an estimate on finishing the correct way so that it won't be damp.
Project Location: Harwinton, CT
1000sq basement needs finishing
Project Location: Harwinton, CT
Constant water in basement after rain. Also want to refinish basement.
Project Location: Harwinton, CT
Comment: Service Basement Waterproofing Source Facebook/Instagram Homeowner? Yes
Project Location: Harwinton, CT
We need to workout space in our house. The spare bedroom we're using is too small. Our basement has a concrete floor and walls and no drop ceiling. The stairs leading to the basement need to be replaced. We need moisture control, adequate lighting, a floor that's appropriate for exercising and mirrors on the walls.
Project Location: Harwinton, CT
Water coming in thru concrete cellar wall where well pipe enters.
Project Location: Harwinton, CT
Looking to get a quote on a basement refinishing
Project Location: Harwinton, CT
We would like to finish our basement.
Project Location: Harwinton, CT
I would like to schedule a free on-site cost estimate for finishing our walk-out basement. Thanks.
Project Location: Harwinton, CT
Basement waterproofing and refinishing
Project Location: Harwinton, CT
Some mold and water after heavy rains or melted snow. previous owner had flood damage