914 Basement Waterproofing and Repair in Chappaqua & New Castle, NY
Chappaqua’s homes are a mix of older houses and later construction: the typical home was built around 1955, and 64% pre-date 1980. The surrounding Town of New Castle has wooded, sloping lots where yard drainage matters as much as the basement.
Basement contractors for Chappaqua & New Castle
How we pick: we list up to six companies per page. Independent firms come first, then firms based outside Westchester, then franchise or network affiliates. Companies that name the town as served come before those that serve the whole county. Listings are free, not paid, and not an endorsement. Home improvement license status was looked up in the Westchester County consumer license search on Oct 26 to 27, 2026, plumber license status in the county trade license search on Oct 27, 2026, and NYS mold license status in the state Labor Department data set; each profile shows what we found.
AMHAC (All Makes Heating & Air Conditioning)
No rating collected yetSump pump installation and repair; plumbing, heating and air conditioning
De La Paz Masonry
No rating collected yetWaterproofing, French drains, sump pumps, masonry
Hudson Landscape Contractors & Tree Care Specialists
No rating collected yetDrainage, grading and French drains alongside landscape construction
Mazzacone Contracting
No rating collected yetInterior and exterior waterproofing, drainage, sump pumps, excavation
Santucci Construction
No rating collected yetDrainage diagnostics and installation, French drains, curtain and footing drains, drywells, catch basins, stormwater management, septic, excavation
Sundahl Waterproofing
No rating collected yetInterior and exterior waterproofing, drainage, sump pumps, foundation repair
Services in Chappaqua & New Castle
Housing in Chappaqua & New Castle
| Place | Typical year built | Built before 1950 | Built before 1980 | Median home value |
|---|---|---|---|---|
| Chappaqua | 1955 | 43.9% | 63.6% | $781,100 |
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates (tables B25035, B25034, B25077), retrieved Oct 2026. Estimates carry a margin of error.
Flooding and water in Chappaqua & New Castle
- Westchester County’s Long Island Sound watershed program lists this municipality in the watershed study areas for “Byram River”, “Bronx River”. [source]
- Flood maps are address-specific. Check your own address on FEMA’s flood map service, and ask any contractor how they treat a high water table on your lot. [source]
Permit notes for Chappaqua & New Castle
From the municipality’s own pages, retrieved Oct 2026. Rules change, so call the building department before work starts.
- The town’s building permit application points to separate approvals that may apply before a permit is issued, including steep-slope, wetlands, tree-removal and stormwater review. Drainage work can trigger them. [source]
- Land-development activity, including drainage work, generally needs an approved stormwater plan under the town’s stormwater chapter. [source]
What basement work costs
| Job | Published range | Source |
|---|---|---|
| Typical interior drain system, 120 ft of wall (low / typical / high) | $3,041 / $7,095 / $12,163 | RenoVetted |
| Sump pump work, White Plains (low to high, midpoint about $1,574) | $840 to $3,673 | RenoVetted |
| Minor crack repairs and basic waterproofing, White Plains | $2,400 to $4,700 | HomeBlue |
| 8 piers or repair points, Yonkers (low / typical / high, modeled) | $4,223 / $10,136 / $16,893 | RenoVetted |
| Basement, partial (national) | $1,500 to $6,000 | HomeGuide |
| Per square foot, White Plains (low / typical / high, modeled) | $26 / $52 / $84 | RenoVetted |
| Whole-house filtration system, installed (national) | $850 to $5,400 | HomeGuide |
Most published Westchester figures are modeled estimates for White Plains or Yonkers, and national ranges where noted (water treatment figures are national). They are not bids for this town; Westchester quotes can run higher. See all costs and sources.
Homeowner guides
- Basement costs (2026)
- How to Check a Westchester Contractor's License Before You Sign
- Water in Basement After Heavy Rain
- Sump Pump Running Constantly
- Signs of a Wet Basement (and What Each One Means)
- Sump Pump vs. French Drain
- Mold in the Basement
- Fall Basement Prep Checklist for Westchester Homes
- Finishing a Basement in Westchester
- Private Well Water in Westchester
Nearby towns
Sources
- Westchester County Planning: Long Island Sound Watershed Program (watershed study areas by municipality)
- FEMA Flood Map Service Center (look up your own address)
- Town of New Castle: Building Permit Application
- Town of New Castle Code, Chapter 108A: Stormwater Management and Erosion and Sediment Control
- U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, tables B25034, B25035, B25077 (via Census Reporter)
Get up to 3 quotes in Chappaqua & New Castle
Tell us about your project and we'll connect you with local pros. Free, no obligation.
Start my free quote request