Sundahl Waterproofing provides New York & Connecticut basement waterproofing, foundation repair & concrete raising services throughout Dutchess, Fairfield, New Haven, Putnam & Westchester Counties.

*We DO NOT service Yonkers, Rockland County or the Five Boroughs*



Sundahl Waterproofing provides, NY & CT, basement waterproofing, foundation repair & concrete raising services throughout Dutchess, Fairfield, New Haven, Putnam & Westchester Counties.


As a full-service Basement waterproofing Contractor, services we offer include the following: basement waterproofing, crawlspace waterproofing, foundation repair, concrete raising and more…

Sundahl Waterproofing

Because we offer free estimates and consultations, you can learn about how your home or business may be at risk, without any strings attached. We’re sure that you’ll be pleased with our helpful and courteous customer service, competitive pricing, and prompt project completion. Since we’re locally owned and operated, you can be sure that you’ll receive the kind of friendly, reliable service you deserve. What’s more, you’ll be glad that the services we provide will help keep your home safe and secure for decades to come.

When you call us, we’ll be glad to explain the negative effects of excess moisture due to condensation or leaks, as well as the benefits we can provide for your specific building and investment.

In order to find out more about how the professionals at Sundahl Waterproofing can help protect your home or business by providing Dutchess, Fairfield, Middlesex, New Haven, Putnam & Westchester Counties basement waterproofing services, call our office to set up your free consultation, today.


Sundahl Waterproofing serves Dutchess, Fairfield, Middlesex, New Haven, Putnam & Westchester Counties in the Tri- state area. We know it’s tough to find a reputable waterproofing contractor. Heck, finding any contractor that you can trust is a challenge!

Respect is what separates Sundahl Waterproofing from other companies. It’s your house and your decision- we are simply giving you all the information you need to make that decision. It is why our customers refer us to friends and family over and over. We say “No Hassle” because we don’t use high-pressure sales tactics.

Sundahl Waterproofing has built a reputation for great customer service. Just ask to contact our references and you will hear similar stories to yours and how we were able to fix their basements.

But enough about us. Let’s talk about your basement!



No signs of water pooling yet, but basement is usually damp or humid. Excess moisture can damage your home’s structure.


Pools of water form on a floor or your wall is always wet. Rain or snow melt increases amount of water in basement, caused by leaks, cracks and poor sealing.

Smell (We DO NOT Do Mold Removal)

Any unfavorable smell is usually caused by mold, which has developed in hard-to-see places. Getting rid of mold will get rid of smells.

Mold (We DO NOT DO Mold Removal)

Visible signs of mold indicate a serious problem that will harm your home and potentially your family. Mold is serious and black mold can be deadly!


  • We had an excellent experience working with Sundahl Restorations. We have a 100-year old house and Christian stood out with his thorough and carefully thought out approach for waterproofing our basement. We could not be happier with his service over the last 7 years. We can now use our super dry basement as additional living space. Christian is always available for questions and maintenance, which gives us great peace of mind.

    Alessandra Tellmann
  • Christian and his team were fantastic, from start to finish. He was accessible by phone (actually returned my call the same day!).. and was over to diagnose and quote the problem in my basement within a few days - because it was not an emergency. He was able to schedule the work quickly and his team (Jean and two other men) were extremely professional, hard working and thorough. Christian's follow-up through-out the process and after the job was done was excellent. It's only been a few weeks, but we have had a number of storms and no water to be seen anywhere -- even with the 6 day power outage!!

    Leslie Danon
  • Fantastic customer service. We were completing a home inspection when we noticed some water intrusion concerns in the basement. Christian responded immediately and provided valuable feedback without upselling us. This company is truly a pleasure to work with.

    Brett Giarrusso
  • I called Christian in order to schedule a time for him to stop by my house to assess and provide an estimate for repairing a leak that we had in our basement. Instead of the three-minute call that I expected, Christian did a 90-min video call with me - for no charge! - guiding me step-by-step through opening my wall and assessing the source of the leak myself. Ultimately, we discovered the source of the leak, which required the services of a plumber instead of a foundation repair specialist. That call saved me hundreds of dollars in assessment fees, allowed me to connect with the right service provider from the get go while Christian insisted on receiving no compensation in return. Since Christian was not needed to repair our leak I cannot attest to the quality of his work. But I can certainly vouch for his professionalism, generosity, expertise, and kindness and have no doubt that his workmanship matches up. He will certainly be my first call if we are ever in a similar situation. In the meantime, I am so grateful to know that there are service providers like Christian out there.

    Aaron Teich
  • Professional, reliable, and knowledgeable - you will not be disappointed! Thank you to Christian and his team for SAVING our basement and being an overall pleasure to work with.

    Amanda Mercaldi

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