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TRUSTED BY THOMPSON, CT HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon14
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Thompson

Avatar for American Dry Basement Systems, LLC
American Dry Basement Systems, LLC
4.9(
118
)

Serving Thompson, CT and surrounding areas

Approved

In business since 1997

Free estimates

Credit card accepted

"I had my basement waterproofed almost 3 years ago by them and I had no issues since then with the basement flooding regardless of how much it rains. I highly recommend using American Dry Basement!"
Drainage Trench
Jackhammer
Mixing SuperCrete
Compress Wash Stones
Spreading SuperCrete

+7

Response time11 hrs
8 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Groundworks
Groundworks
5.0(
12
)

Serving Thompson, CT and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2025

Free estimates

Warranties offered

"Aaron Lenker add Corbin Gillichbauer of Groundworks leveled concrete walks around my corner lot in Montoursville Pa. They arrived around noon time and were finished about 5 1/2 hours later. They did their work very professionally. They did an excellent job. I would rate their work 5 of 5 stars."
Foundation
Foundation
Foundation
Concrete
Concrete

+16

429 neighbors recently requested a quote
Avatar for New London Home Improvements LLC
New London Home Improvements LLC
5.0(
2
)

Serving Thompson, CT and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

"We had a leak in our foundation that flooded our finished basement newlondonhomeimprovements came to our property and took a look at what we had going on. They did there inspection and found a solution for the issue. They came out dug the out side of the foundation found the issues with our foundation and then sealed our foundation with a drainage system Now our basement is completely dry thanks again newlondonhomeimprovements"
2 neighbors recently requested a quote
Avatar for Cowan Family Plumbing LLC
Cowan Family Plumbing LLC
5.0(
7
)

Serving Thompson, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"He came over and did the rough-in for finishing my basement. Took the time to think about what was the most logical things need for me as a homeowner (access to pipes, shut off valves, hook up locations, etc..) very professional and showed quality work."
Bathroom Install
Bathroom Install
Master Water Conditioning System Install
Master Water Conditioning System Install
Response time4 days
Response rate100%
10 neighbors recently requested a quote
Avatar for Stonecare Paving and Masonry
Stonecare Paving and Masonry
4.7(
64
)

Serving Thompson, CT and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"Fantastic. I can't recommend them enough. The owner is one of the most honest, conscientious and dependable workers I've ever had the pleasure of hiring, and his crew was the same. These are expert craftsmen, and the work is stunningly beautiful. They are worth every penny (good masonry doesn't come cheaply)."
New patio with design in center using granite and charcoal colors to highlight
Sealed and waterproof basement
Basement fully waterproofed
Patio done in Holland stone
Damp proof drainage

+918

Recommended by96%of homeowners
Avatar for The BullBag
The BullBag
5.0(
15
)

Serving Thompson, CT and surrounding areas

In business since 2001

Credit card accepted

"Great! This company is professional, easy to work with, and offers a great value for the service. I did the leg work and compared them and their pricing with that of several dumpster companies and will continue to use the BullBag. Their pricing always blows the dumpsters away - BullBag doesn't charge by how much it weighs like a dumpster does AND I get to keep my BullBag. I don't have to wait for a dumpster to be delivered either."
The BullBag truck in MA
The BullBag truck in NY
Toys for Tots
Recommended by100%of homeowners
Avatar for Set In Stone
Set In Stone
4.3(
23
)

Serving Thompson, CT and surrounding areas

In business since 1982

Free estimates

"Ray and his team were incredibly professional, kind and courteous throughout all of the home projects. Their work on my basement foundation, installation of French drains and the rebuilding of an exterior wall were all phenomenal and at a very fair price. I highly recommend their services 10/10"
Recommended by86%of homeowners
Showing 1-10 of 41
Basement Waterproofing questions, answered by experts

A leak under your foundation from a water supply line or sewage line is likely to lead to water pooling on certain areas of your property during rainfall, abnormally fast-growing or green grass in certain sections of your lawn, and differential settlement of your foundation, which can result in large foundation cracks, windows and doors failing to operate properly, a wavy or sloping roofline, or damages or irregularities in your interior walls, including cracks and bulging. If it’s a plumbing line embedded in your slab, you’ll also likely notice above-average water bills.

Water that pools under pavers can erode the soil foundation and weaken the paver structure. In some situations, it can also cause mold and mildew growth. If that happens, you may need to start budgeting for the cost to build and install a patio to replace the damaged one.

Crawl spaces are the more desirable option overall because they provide additional space for storage and utilities, but they are more expensive to install and maintain. Slab foundations are considered a better option in warmer climates where the depth of the frost line isn’t an issue because they’re more affordable, but crawl spaces are better in areas where the frost line is deep or where flooding can be an issue.

Since basements are prone to water and moisture issues and the resulting problems can be expensive to repair and potentially damaging to your home, basement waterproofing is almost always worthwhile. Even for homes that haven’t experienced water infiltration, waterproofing the basement is insurance against facing expensive repair bills in the future. All basements will leak at some point, so fixing drainage issues and taking steps to prevent moisture and water infiltration is wise.

The cost of basement waterproofing is $4,950 for the average homeowner. However, you could end up paying between $600 and $14,000, depending on factors like basement size, waterproofing method, and the region you live in. 

If you live in an area with heavy rainfall, you might be paying more for waterproofing than if you lived somewhere drier since waterproofing contractors would be in high demand. Likewise, a 500-foot basement costs between $2,500 and $5,000 to waterproof, but that price rises significantly for a larger basement.

The Thompson, CT homeowners’ guide to basement waterproofing services

From average costs to expert advice, get all the answers you need to get your job done.