
Get matched with top basement waterproofing pros in Cornwall, CT
There are 4 highly-rated local basement waterproofing pros.
Need a pro for your basement waterproofing project in Cornwall, CT?
Verified Reviews for Basement Waterproofing pros in Cornwall, CT
*The Angi rating for Basement Waterproofing companies in Cornwall, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.
*The HomeAdvisor rating for Basement Waterproofing companies in Cornwall, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.
Last update on December 11, 2025
Find Basement waterproofing pros in Cornwall

American Dry Basement Systems, LLC
American Dry Basement Systems, LLC
We serve our customers with pride and work hard to ensure complete satisfaction with every job. Having waterproofed close to 25,000 basements since 1997, you can be sure you'll get the experience, quality, and waterproofing performance you need. Why choose us? We want to help protect your most significant investment from any foundation damage or water control problems. We uniquely use ICC code compliant practices, dust suppression, our proprietary foundation repair technology, and leave your home without any post-repair mess. Whether your basement floods during rainstorms or it just has that musty, "basement odor," we have the solution! We are locally owned and operated. Give us a call today!
"Excellent service. Life time guarantee"
Michelle J on October 2025
We serve our customers with pride and work hard to ensure complete satisfaction with every job. Having waterproofed close to 25,000 basements since 1997, you can be sure you'll get the experience, quality, and waterproofing performance you need. Why choose us? We want to help protect your most significant investment from any foundation damage or water control problems. We uniquely use ICC code compliant practices, dust suppression, our proprietary foundation repair technology, and leave your home without any post-repair mess. Whether your basement floods during rainstorms or it just has that musty, "basement odor," we have the solution! We are locally owned and operated. Give us a call today!
"Excellent service. Life time guarantee"
Michelle J on October 2025

Budget Dry Waterproofing, Inc.
Budget Dry Waterproofing, Inc.
Budget Dry Waterproofing is a waterproofing company founded on the belief that quality home improvement work does not need to break the bank. We are dedicated to providing excellent service.
"Chris was efficient and friendly. Got the job done quickly. "
M S on November 2025
Budget Dry Waterproofing is a waterproofing company founded on the belief that quality home improvement work does not need to break the bank. We are dedicated to providing excellent service.
"Chris was efficient and friendly. Got the job done quickly. "
M S on November 2025

Empire Construction Waterproofing llc
Empire Construction Waterproofing llc
We specialize in basement waterproofing, foundation sealing and crack repair, yard drainage, yard grading, gravel road maintenance, small excavation. We pride ourselves on the quality work we provide, while delivering great customer service. Check out all the services we offer below and call -or- click to schedule a free estimate today!
"Great work start to finish! They waterproofed our basement and fixed a foundation crack that was leaking for years. Super professional, quick, and neat work. No more water issues! Highly recommend!"
Tatsiana M on October 2025
We specialize in basement waterproofing, foundation sealing and crack repair, yard drainage, yard grading, gravel road maintenance, small excavation. We pride ourselves on the quality work we provide, while delivering great customer service. Check out all the services we offer below and call -or- click to schedule a free estimate today!
"Great work start to finish! They waterproofed our basement and fixed a foundation crack that was leaking for years. Super professional, quick, and neat work. No more water issues! Highly recommend!"
Tatsiana M on October 2025

Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
Connecticut Basement Systems is your trusted expert for basement waterproofing, crawl space repair, basement finishing, and foundation repair. Using patented, warrantied products, we provide permanent solutions for your home. Have a wet, flooded basement or crawl space? Tilted or bowing foundation walls? A basement you want to finish? We have a solution. We proudly serve homeowners and businesses all throughout Connecticut & Westchester County, NY. Call us today for a free inspection and no-obligation, estimate. Financing available. Additional phones - (203) 881-5090. Award winning.
"Chuck Stofko was very informative. Was patient in answering all my questions. Spent along time with me reviewing the process and the steps needed to waterproof my basment. I highly recommend him."
Justin F on August 2023
Connecticut Basement Systems is your trusted expert for basement waterproofing, crawl space repair, basement finishing, and foundation repair. Using patented, warrantied products, we provide permanent solutions for your home. Have a wet, flooded basement or crawl space? Tilted or bowing foundation walls? A basement you want to finish? We have a solution. We proudly serve homeowners and businesses all throughout Connecticut & Westchester County, NY. Call us today for a free inspection and no-obligation, estimate. Financing available. Additional phones - (203) 881-5090. Award winning.
"Chuck Stofko was very informative. Was patient in answering all my questions. Spent along time with me reviewing the process and the steps needed to waterproof my basment. I highly recommend him."
Justin F on August 2023

ProSeal Waterproofing
ProSeal Waterproofing
I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!
"Alex was amazing!! We had a crack in our foundation that another company attempted to repair numerous times. We were fortunate enough to hear about ProSeal and I am happy to report not only did Alex repair the crack to near perfection but the work was done timely, neatly and his customer service skills are top notch. I would HIGHLY recommend ProSeal for all of your foundation needs."
Angela M on October 2025
I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!
"Alex was amazing!! We had a crack in our foundation that another company attempted to repair numerous times. We were fortunate enough to hear about ProSeal and I am happy to report not only did Alex repair the crack to near perfection but the work was done timely, neatly and his customer service skills are top notch. I would HIGHLY recommend ProSeal for all of your foundation needs."
Angela M on October 2025

All Build Masonry And Roofing LLC
All Build Masonry And Roofing LLC
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!
"My front stairs was in bad condition, all build soon fixed it and brought it back to life would recommend "
daniel c on October 2025
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!
"My front stairs was in bad condition, all build soon fixed it and brought it back to life would recommend "
daniel c on October 2025

Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
Work completed by Connecticut Basement Systems, Inc., is warranted for lifetime of your home. Satisfaction is guaranteed and we assure prompt reply to all inquiries. Free estimates and financing are available. We've wowed over 30,000 customers since 1987. We have an A plus Better Business Bureau rating. Check us out for unbiased reviews and customer testimonials.
"Overall, working with the company was a good experience."
Marcy W on October 2024
Work completed by Connecticut Basement Systems, Inc., is warranted for lifetime of your home. Satisfaction is guaranteed and we assure prompt reply to all inquiries. Free estimates and financing are available. We've wowed over 30,000 customers since 1987. We have an A plus Better Business Bureau rating. Check us out for unbiased reviews and customer testimonials.
"Overall, working with the company was a good experience."
Marcy W on October 2024

Groundworks
Groundworks
Groundworks provides dependable foundation repair, basement waterproofing, concrete lifting, and crawl space solutions for Connecticut homes. Our commitment enhances the value and safety of homes within our community.
"Chuck, Alex and Naki did a great job. Lots of attention to detail. Walked me me the whole process so I would feel comfortable"
Sandy G on June 2025
Groundworks provides dependable foundation repair, basement waterproofing, concrete lifting, and crawl space solutions for Connecticut homes. Our commitment enhances the value and safety of homes within our community.
"Chuck, Alex and Naki did a great job. Lots of attention to detail. Walked me me the whole process so I would feel comfortable"
Sandy G on June 2025

Groundworks
Groundworks
Groundworks is North America’s leading foundation repair and water management solutions company. Groundworks has been serving homeowners across the U.S. and Canada for decades, providing quality home repair solutions. Groundworks is a BBB-accredited business and a multi-time recipient of the Angi Super Service Award. Our 50-plus years of combined expertise brings Connecticut homeowners innovative solutions and industry-leading warranties to protect their biggest investment, their homes. HIC.0699918
"Professional and efficient tech."
Mark R on April 2025
Groundworks is North America’s leading foundation repair and water management solutions company. Groundworks has been serving homeowners across the U.S. and Canada for decades, providing quality home repair solutions. Groundworks is a BBB-accredited business and a multi-time recipient of the Angi Super Service Award. Our 50-plus years of combined expertise brings Connecticut homeowners innovative solutions and industry-leading warranties to protect their biggest investment, their homes. HIC.0699918
"Professional and efficient tech."
Mark R on April 2025

Valley Roofing and Construction, LLC
Valley Roofing and Construction, LLC
Valley Roofing and Construction, LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.
"excellent experience working with valley roofing and construction to replace our old roof! and their customer service was responsive and personal. on-site crew was efficient and thorough with clean up! after the roof was installed we didn't find a speck of construction debris leftover.definitely recommend using valley roofing and construction"
patrick r on October 2025
Valley Roofing and Construction, LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.
"excellent experience working with valley roofing and construction to replace our old roof! and their customer service was responsive and personal. on-site crew was efficient and thorough with clean up! after the roof was installed we didn't find a speck of construction debris leftover.definitely recommend using valley roofing and construction"
patrick r on October 2025
The Cornwall, CT homeowners’ guide to basement waterproofing services
From average costs to expert advice, get all the answers you need to get your job done.

Crawl space repair costs can seem intimidating, but putting them off can lead to bigger issues. Learn about repair costs in this guide to set your budget.
•Discover how much sump pump installation costs, including average prices, key cost factors, and tips to save on your basement waterproofing project.

Need to fix basement water problems or safeguard your home from damage in the future? Use this basement waterproofing cost guide to budget appropriately.

Can’t seem to get rid of the moisture and mold in your basement? Learn why basements tend to hold moisture and how to get rid of moisture in the basement.

Dealing with a damp crawl space? Use these eight simple tips to get rid of the moisture and water-related problems once and for all.

Crawl space encapsulation can make a big difference if you’re experiencing issues with mold, mildew, and pests. Here’s what you need to know.
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- 🌱 "Mow a small front yard"
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