914 Foundation Repair in Harrison, NY
Harrison is a mid-century town: the typical home was built around 1962 and 68% pre-date 1980, with a median value just over $1 million. Several brooks and rivers run through it. The repair method depends heavily on the type of foundation and soil. An independent structural engineer can help you compare proposals, which is worth considering for any job involving bowing walls, piers or underpinning.
Foundation repair companies for Harrison
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.
De La Paz Masonry
No rating collected yetWaterproofing, French drains, sump pumps, masonry
F. La Rocca & Sons
No rating collected yetMasonry, drainage and waterproofing
Sundahl Waterproofing
No rating collected yetInterior and exterior waterproofing, drainage, sump pumps, foundation repair
Gregg Segnit Waterproofing
No rating collected yetBasement and foundation waterproofing, drainage, sump pumps
Kellets Anchored Home Improvement
No rating collected yetExterior and interior waterproofing, drainage, crack repair, sump systems, foundation repair coordination
Vulcan Basement Waterproofing
No rating collected yetBasement waterproofing, drainage, sump pumps, foundation repair
Housing in Harrison
| Place | Typical year built | Built before 1950 | Built before 1980 | Median home value |
|---|---|---|---|---|
| Harrison | 1962 | 26.1% | 67.7% | $1,010,700 |
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 Harrison
- Westchester County’s Long Island Sound watershed program lists this municipality in the watershed study areas for “Blind, Beaver Swamp and Brentwood Brooks; Milton and Port Chester Harbors”, “Mamaroneck and Sheldrake Rivers; Mamaroneck Harbor”, “Bronx River”. [source]
- The town code includes a flood damage prevention chapter. [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 Harrison
From the municipality’s own pages, retrieved Oct 2026. Rules change, so call the building department before work starts.
- The Building Department lists plumbing and excavation/regrading permits; land disturbance needs Engineering approval. Call 914-670-3050 to confirm your discharge location and permit before work starts. We did not find a sump-pump-specific ordinance. [source]
What it costs
Foundation repair spans a very wide range. HomeBlue's White Plains guide gives $2,800 to $29,500 for major repairs involving underpinning or piles and $2,400 to $4,700 for minor crack repair with basic waterproofing, but notes the range is broad because every job differs. A modeled Yonkers estimate (RenoVetted) puts pier or repair-point work around $528 to $2,112 per point, or about $4,200 to $16,900 for an 8-point job. National HomeGuide figures put crack injection at $250 to $800 and bowed wall repair at $5,000 to $15,000. Only a structural evaluation can tell you which applies to your home. Full cost guide with sources.
Frequently asked questions
How many foundation repair companies serve Harrison?
We show 6 of 10 companies we found for Harrison: 7 name Harrison as an area they serve, and the rest serve all of Westchester County. Always confirm a company covers your address.
Does Harrison require a permit for this work?
Often yes. See the permit notes on this page, then call the Harrison building department before you sign a contract.
Is a hairline crack in my foundation serious?
Thin vertical cracks in poured concrete are common from shrinkage. Horizontal cracks, bowing, cracks wider than a coin edge, or cracks that leak or grow should be looked at by a foundation specialist or structural engineer.
Do I need a structural engineer?
For bowing walls or significant settlement, an independent engineer's report can help you compare contractor proposals objectively.
Nearby
Sources
- Westchester County Planning: Long Island Sound Watershed Program (watershed study areas by municipality)
- Town/Village of Harrison Code, Chapter 146: Flood Damage Prevention
- FEMA Flood Map Service Center (look up your own address)
- Town/Village of Harrison: Building Department
- U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, tables B25034, B25035, B25077 (via Census Reporter)
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