Serving Connecticut, Westchester and Putnam Counties

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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

Reputable Bowing Wall & Wet Basement Repair Company in Portland, CT

Your system works great! your crew, office staff, and salesman were all very helpful and very professional. Your Back up...
Happy Customers Surrounding Portland, CT
Work Requests

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Reviews From Portland
Testimonials From Portland

Portland, 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 Portland:

  • 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 Portland and areas nearby!

Trusted basement waterproofing company serving Portland

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 Portland:

  • 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 Portland 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 Portland

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 Portland:

  • 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 Portland and areas nearby.

Reliable crawl repair & encapsulation services in Portland

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 Portland:

  • 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 Portland and areas nearby.

Transform your home with basement finishing in Portland

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 Portland:

  • 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 Portland 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 Portland - 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 Portland and nearby areas.

News & Events from Portland
Did you feel the earth move under your feet? Were you feeling a little “off -balance?” No, you were not imagining the shake… its been confirmed. It was a real earthquake!... [Read more]
Work Requests From Portland, CT
Project Location: Portland, CT
Hi, So I'm looking to assess a basement flooding issue we had on a home we just purchased. I'm looking to determine where that flood came from and get a price to fix it. No sure if that is something you can help with, but hoping it might be. Thank you.
Project Location: Portland, CT
Looking to partial finish our basement
Project Location: Portland, CT
Address water in basement.
Project Location: Portland, CT
Hello, We have a portion of our fully unfinished basement that we are looking to have remodeled to create more living space. We have an idea of what we would like to do but are not sure on design ideas and feasibility of some of the things we would like to do. Are you available to stop by in the near future to go over our intentions and to possibly provide a quote? Thanks. - Ken
Project Location: Portland, CT
Having wood eating bug issues due to damp basement.
Project Location: Portland, CT
I'm looking for my options and price to refinish my basement-
Project Location: Portland, CT
Basement water proofing.
Project Location: Portland, CT
Constant water in crawl space due to high water table - amount depends on rain and high tides
Project Location: Portland, CT
Need estimate on sani-dry dehumidifier or something like it. House is one level with basement length of house- extreme moisture in living areas and very humid/damp in summer. No AC in house but house stays cool as surrounded by trees - just very damp and humid.
Project Location: Portland, CT
Need sump pump system check up.
Project Location: Portland, CT
Have a full unfinished basement and would like to have it finished. No special design, just walls, ceiling and floor.
Project Location: Portland, CT
In the process of buying the property. Inspector noted the retaining wall is unsafe in the backyard and might not pass the appraisal with the bank. Part of the retaining wall is leaning in the backyard and one part crumbled over. Looking for an estimate and possibly a repair
Project Location: Portland, CT
Our house was built in 1853 with a brownstone foundation. I am looking for help with waterproofing and mold remediation. I also have concerns about foundation settlement.
Project Location: Portland, CT
Looking to finish our basement. We may do this ourselves or hire an outside company. In process of getting quotes.
Project Location: Portland, CT
Inspection discovered two cracks in crawlspace walls and there is not a de-humidiflier..also, musty smell in crawlspace which is also in the above master bedroom
Project Location: Portland, CT
We have a unfinished basement, we are not sure if we want to get it done this fall or next spring? We would like to know what can be done and the cost so we can figure out if I take out a home equity loan or other options. If you're interested in coming out and giving us a free estimate and answer our questions knowing that if we went ahead with any work that it could be as late as March or April of 2019.
Project Location: Portland, CT
I have a foundation crack in my basement that I need fixed, it does not and never has leaked water. I would like a quote to repair, I can send photos if need be.
Project Location: Portland, CT
Need a basement water proofed and refinished
Project Location: Portland, CT
We are looking to finish part of our basement as an alternate area for our children to go with their friends
Project Location: Portland, CT
I have an 1886 home and the kitchen is over a very small crawlspace. I am wondering how I can insulate it without tearing up the kitchen floor.