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We're a Bronx basement waterproofing company that fixes wet basements for homeowners across the borough. We specialize in waterproofing. We don't sell it alongside roofing, siding, and deck work the way most of our competition does, and every person on your crew has worked in Bronx clay soil and Bronx flood zones specifically.
In New York City, a basement that shows ongoing water intrusion, unpermitted alterations, or an illegal living-space conversion can trigger a Department of Buildings or Environmental Control Board violation, and those violations commonly start with the same moisture issues covered on this page.
Most homeowners aren’t thinking about code compliance until an inspector’s already standing in their basement. DOB doesn’t really distinguish between a basement that floods once during a bad storm and one where hydrostatic pressure has been building against the foundation for years, both can end up flagged the same way. Catching the water problem early is usually what separates a straightforward repair from a violation on record.
Standing water, visible mold, or an unpermitted basement conversion are the most common reasons homeowners end up with a citation.
If you're dealing with a citation already, our Bronx basement violation clearance brief covers what happens next.
Basement conditions can differ sharply between lower-lying parts of Throggs Neck and higher-ground areas of Riverdale, even though both are in the same borough. A national franchise selling waterproofing in five states won't know that difference. We do, because the Bronx is the only place we work. Most of the competition in this borough sells waterproofing as one line item on a longer list, roofing, siding, general repairs, waterproofing tacked on wherever it fits. That's a different business than ours. Every job we take is a basement, every crew member has spent years learning what Bronx clay and Bronx water tables do to a foundation specifically.
Every basement problem we see in the Bronx comes down to water finding a way in, through a foundation wall, a cracked joint, or ground that was never graded to drain properly. Which fix makes sense depends on where that water’s actually coming from, and that’s usually clearer once we’ve seen the space.
Sealing a below-grade space against water intrusion for good, whether the fix belongs on the inside, the outside, or both.
Closing the specific points in a foundation wall, often the cove joint, where water is already getting through.
Fixing structural damage caused by sustained hydrostatic pressure against the foundation, not just patching the leak on top of it.
Sealing and drying out a crawl space, a source of moisture and mold that can sit untouched for years without ever reaching the basement above it.
Installing or replacing the pump responsible for moving water out of the house before it collects.
Rerouting groundwater around the foundation before it builds pressure against the wall, common on properties where the yard slopes toward the house.
Twenty-two years and 600+ Bronx basements later, here’s what separates us from a contractor passing through the borough for the day.
Licensed and insured with $2M in general liability coverage, and registered with the NYC Department of Buildings, Bronx Borough Office. Every technician on the crew works exclusively in the Bronx, not across five states.
From a flooded cove joint in Throggs Neck to a full exterior seal in Riverdale, the work speaks for itself.
Bronx basements flood more than most because of three overlapping factors: a high water table near the Bronx, Harlem, and Hutchinson Rivers, heavy clay soil that holds groundwater close to the surface, and housing stock built before modern drainage codes existed. A 2024 Federal Reserve Bank of New York study named the East Bronx among the city's highest flood-risk areas for basement housing. Together, these conditions mean water finds its way to a foundation wall long before a storm makes it obvious. That's part of why Pelham Bay, Throggs Neck, City Island, and Schuylerville show up often in our service calls, low ground near water, in an area where soil and groundwater conditions can put more pressure on a foundation. Riverdale's water table pressure has a different source, from the Hudson, but the effect on a basement wall can look similar either way.
Years of experience
Here's what homeowners across the Bronx have said after working with our team.
They explained exactly where the water was coming from instead of trying to sell us the biggest system. The estimate was clear, and the crew kept the basement clean while they worked.
Throggs Neck
We had water coming through the basement wall after heavy rain. They came out quickly, found the problem, and walked us through what needed to be fixed.
Riverdale
The crew knew exactly what they were looking for. They checked the foundation, cove joint, and sump pump before recommending anything. The whole process was good.
Pelham Bay
A wet basement doesn't fix itself, and depending on your soil and drainage conditions, it can get worse before it gets better. Tell us what you're seeing and we'll walk the foundation before we tell you what it needs. As a basement waterproofing contractor in the Bronx, NY, who's walked hundreds of foundations just like yours, we won't guess before we've actually looked.
A free inspection means someone's actually in your basement, checking the cove joint, the walls, and whether your sump pump is doing its job before it fails during the next storm.
You get a written estimate out of it either way, itemized by what we find, not a flat number pulled from the size of your foundation alone. No pressure to sign anything on the spot, the estimate is yours to think over, compare, or call us back on once you're ready.
Honestly, it depends on what we find when we get in there. A small crack repair might run a few hundred dollars, while a full exterior dig and seal is a bigger job with a bigger number attached. We won’t quote you off the phone, we’d rather walk your foundation first and give you a number based on what’s actually happening.
If water’s actively coming in, call us and we’ll get someone out the same day. We’re not going to make you wait through a normal scheduling queue while your basement fills up, that’s not the kind of emergency that fits a calendar slot.
Most likely, yes. We cover every neighborhood in the borough. Whether you are up north in Woodlawn or Riverdale, down by the water in Throggs Neck or City Island, or over in Kingsbridge and Morris Park, give our office a ring to check our exact dispatch window for your street.
Most homeowner policies exclude flooding, that’s a separate policy. Sudden damage, like a burst pipe, is sometimes covered depending on your carrier. Your insurance agent can give you a straight answer faster than we can, we can only tell you what we find in your basement, not what your policy covers.
Yes. Every job we complete comes with a written warranty specific to what we did, since a French drain and a full foundation seal don’t carry the same coverage. We’ll walk through exactly what’s covered before we start.
