Sundahl Waterproofing

Larchmont, NY

Sundahl Waterproofing provides basement waterproofing, foundation repair, concrete leveling, crawl space waterproofing and moisture control, sump pump installation, and drainage and water management services.

About

About Sundahl Waterproofing

Based in Larchmont, NY, Sundahl Waterproofing handles basement and crawl space waterproofing, moisture control, foundation repair, and water management projects. Its services include foundation crack repair, concrete leveling, sump pump installation and replacement, and drainage solutions for properties affected by water intrusion or structural concerns. Sundahl Waterproofing serves Dutchess, Putnam, and Westchester counties in New York, along with Fairfield, Hartford, and New Haven counties in Connecticut.

Google reviews

Featured Google Reviews

A selection of recent reviews currently displayed from this contractor's Google Business Profile.

5.0average on Google Maps · 60 ratings via Google Maps
  • Christopher Serra★★★★★October 8, 2026

    Christian and the entire crew were amazing. They were extremely professional, clean and thorough. I would absolutely recommend them for any project.

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  • Joe★★★★★October 5, 2026

    Sundahl Waterproofing came through when we needed them most. They responded on very short notice, showed up ready to work, and got our new sump pump system and dehumidifier installed quickly and professionally. The crew was hardworking, attentive, and clearly took pride in doing the job right. Excellent work from start to finish. JG Yorktown

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  • Andre Szyszkowski Jr★★★★★July 31, 2026

    Christian of Sundahl Waterproofing was a pleasure to work we. Our system was installed by another vendor who had since retired. We really wanted to stay with the same smart pump system that was installed, it's been amazing. Looking around I was given a reference to Sundahl by 2 sources, and man, were they right. He was pleasant, helpful, RESPONSIVE and informative and quick! He assessed and fixed our issue (pump replacement), and thoroughly checked the rest of our system to ensure the problem was fully addressed. Well here is another recommendation. Go Sundahl Waterproofing!

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  • Peter Iglesia★★★★★June 15, 2026

    Great pre-sales process. Live in a home built in 1930. Answered all my questions Great work. Basement is waterproofed as promised Great follow-up after the installation. Basement still had a high bit of humidity as we thought we might. Waterproofing does not mean no humidity. Connected a dehumidifier and my basement feels like it never has before. Thanks!

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  • Jason Cea★★★★★June 15, 2026

    Project was completed quickly and the area was restored perfectly. We are ready for the next time we get heavy rains and floods.

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Sundahl Waterproofing(914) 834-9212