Yonkers, NY · Westchester County · Hudson River Corridor · Since 1994
Basement Waterproofing in Yonkers, NY.
Interior drainage, sump systems, vapor barriers. Built for the oldest housing stock in Westchester County – the pre-1900 stone foundations of Park Hill and Hudson Hill, the Tudor brick walls of Bryn Mawr, and the Saw Mill River and Hudson watershed pressure that pushes groundwater against every slab joint downtown. Lifetime warranty in writing, transferable when you sell.
Free inspection. Written estimate within 24 hours. Stone-wall friendly – interior drainage that preserves century-old fieldstone foundations.
- Lifetime waterproofing warranty
- Stone-foundation safe (pre-1900 ready)
- Hudson-watershed engineered
Three signs Yonkers basements show first
Pre-1900 stone walls and Saw Mill River pressure show their hand early.
Yonkers has the oldest dominant housing stock in our service footprint. The signs below are the way pre-1900 fieldstone and 1920s cinder-block foundations tell you the Hudson watershed has finally found a way in.
Stains tracing the foundation joint
Wet streaks where the stone or block wall meets the slab, especially after a nor’easter or tropical remnant. On Park Hill and Hudson Hill stone-wall homes the parge coating shows the path first. Downtown around Getty Square and along the Saw Mill River corridor it shows up as a hydrostatic-pressure line that traces the entire perimeter.
SCHEDULE A FREE ESTIMATEDamp salt-air smell that lingers
Pre-WWII Yonkers basements with original wood floor framing absorb humidity year-round. The smell is mold spores feeding on moisture the stone wall is wicking from the surrounding soil. Long-term it damages stored belongings, drywall, and the air quality of the floors above – particularly in dense Nodine Hill and Ludlow rowhouse stock.
SCHEDULE A FREE ESTIMATEEfflorescence on stone or block
White, chalky, crystalline residue on fieldstone, brick, or cinder-block walls. That is salt left behind as water evaporates through century-old masonry. It is not the problem – it is the symptom that the Hudson-watershed water table is actively moving through your foundation.
SCHEDULE A FREE ESTIMATEBuilt for Yonkers, NY
What makes Yonkers basements different.
Waterproofing in Yonkers is shaped by the Saw Mill River parkway corridor and the steep 416-foot elevation gradient that sheds water downhill into lower basements. In Park Hill and Hudson Hill, the combination of Manhattan schist bedrock close to the surface on the bluffs, with glacial till on the hillsides and valley alluvium below keeps the water table high enough to push hydrostatic pressure through any unprotected slab joint. That is why interior drainage outperforms exterior excavation on the housing stock here: pre-1900 Victorians and Tudors on Park Hill and Hudson Hill, 1920s to 1940s colonials in Crestwood, and dense pre-WWII multifamily downtown. The drain tile sits above the footing, daylights into a sealed sump, and discharges below frost. The wall and slab stay structurally intact.
- ZIP coverage. Service covers Yonkers ZIPs 10701, 10703, 10704, 10705, 10708, and 10710.
- Adjacent towns. We also serve nearby Bronxville, Hastings-on-Hudson, and Mount Vernon.
- Frost depth. Footings on every job we run extend below the 42-inch frost line required by the New York State Residential Code (Table R301.2).
Why CT and NY homeowners pick Big Easy for waterproofing.
How we actually do it
Interior drainage. Not exterior excavation.
The waterproofing industry has a dirty secret: the most profitable job is also the most invasive one. Excavating your yard, exposing the foundation from outside, applying a membrane, backfilling. $25,000 to $40,000 typical. Disrupts your landscaping for weeks.
The cleaner truth: for the vast majority of CT and NY basements, an interior drainage system solves the same problem – permanently – for a fraction of the cost, with zero impact on your yard. Here is exactly how we do it.
Free inspection
A specialist examines every foundation wall, every existing drain, every moisture sign. We document with photos and measurements. You get a written estimate within 24 hours – no high-pressure follow-up.
Cut perimeter trench
We carefully saw-cut a 4-to-6-inch-wide trench around the interior perimeter where the foundation wall meets the slab – right above the existing footing. Dust controlled at the source. No demolition outside this strip.
Install drain + sump system
Perforated PVC drainpipe laid in clean stone, pitched toward a sump basin we install in the corner. Battery backup pump included as standard. Discharge line routed outside, below the 48 inches NY frost depth so it never freezes shut.
Vapor barrier + restore slab
Wall vapor barrier installed and sealed to the new drain. Concrete poured back over the trench, finished smooth. The basement looks essentially the same as when we arrived – only now it stays dry, with a lifetime warranty in writing.
When exterior excavation IS the right call
We tell you straight: about 10–15% of jobs genuinely need exterior excavation. Severe foundation cracks under hydrostatic load. Failed exterior membrane on a relatively new home. Certain century-old fieldstone foundations. If that’s your situation, we’ll say so on the free inspection. We won’t sell you interior drainage that won’t solve the actual problem – and we won’t sell you exterior excavation that isn’t needed. That’s the difference.
Real waterproofing projects in CT and NY.
Illustrative example · representative of typical basement waterproofing work · not a specific Big Easy customer project[Problem solved in one sentence – e.g. “Recurring storm-driven seepage stopped, basement bone-dry through Hurricane season”]
Illustrative example · representative of typical basement waterproofing work · not a specific Big Easy customer project
Illustrative example · representative of typical basement waterproofing work · not a specific Big Easy customer project[Problem solved in one sentence – e.g. “Pre-listing moisture mitigation completed, inspector signed off in time for closing”]
Illustrative example · representative of typical basement waterproofing work · not a specific Big Easy customer project
Yonkers, NY · Basement Waterproofing FAQs
Questions Yonkers homeowners ask us about basement waterproofing.
My Yonkers home was built before 1900 with a fieldstone foundation. Is interior drainage safe for that wall?
Yes – in fact, interior drainage is generally safer for pre-1900 fieldstone walls than exterior excavation. Excavating outside a 100-plus-year-old fieldstone wall risks destabilizing the soil that has been holding it in place for a century. The interior approach installs the drain tile just above the original footing without disturbing the structural integrity of the stone coursing. We have done it on Park Hill Victorians, Hudson Hill Tudors, and Nodine Hill rowhouses.
Does Yonkers require a permit for interior basement waterproofing?
Permit requirements vary by project scope. The Yonkers Building Department generally requires permits for sump installations with discharge lines and any concrete-cutting work over a certain threshold. We coordinate the permit + inspection paperwork end-to-end so the homeowner does not have to navigate the New York State Residential Code and the city’s municipal addenda separately.
How does the Saw Mill River and Hudson River watershed affect my basement?
The Saw Mill River runs north-south through Yonkers and historically flooded the downtown corridor; the Hudson River forms the western boundary. Basements in the lower elevations around Getty Square, Ludlow, and Glenwood absorb watershed runoff from the entire upland part of the city during nor’easters and tropical events. That hydrostatic pressure is the single biggest waterproofing variable in Yonkers, and it is why we engineer for higher flow than a typical inland install.
What is the price range for a Yonkers basement waterproofing job?
Costs vary by basement size, foundation type, and the specific moisture pattern we find on inspection. Interior drainage systems on Yonkers homes typically fall in a broad range driven by linear footage of perimeter, pump count, and any wall-restoration scope. We provide a written estimate within 24 hours of the free inspection so the number you see is project-specific, not a generic figure.
Get your Yonkers waterproofing estimate. Free inspection, 24-hour written quote.
About an hour on site walking the foundation. No verbal guesses. No high-pressure follow-up. An honest answer for your specific Yonkers basement – whether you need interior drainage or one of the rare cases where exterior work genuinely makes sense.
- Full foundation walk-through
- Photo documentation of every moisture sign
- Written estimate emailed within 24 hours
- Lifetime warranty in writing, transferable on home sale
- Honest answer if exterior excavation is necessary – or isn’t
Book your free inspection
No obligation. Written estimate within 24 hours.
Tell us what is happening with your basement and we will email a written estimate within 24 hours. No cost, no obligation, no high-pressure follow-up.
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