Foundation Repair on Long Island NY

Long Island might as well be called the land of the wet basement. The entire island is glacial outwash — sand and gravel over a water table that sits just feet below grade in many areas. Basements here do not leak because something is wrong; they leak because the house is sitting in the water table. Add 1950s–1970s block foundations now hitting 50–70 years old, coastal storm surge on the South Shore, and sandy soils that shift under footings, and you have steady demand for every foundation service we offer.

The Water Table Problem

On Long Island, waterproofing is not optional — it is the cost of having a basement. Interior French drain systems with high-capacity sump pumps (primary plus battery backup, always) are the standard installation, and we size them for the island's worst storms, not its average rain. Sandy soils drain fast but also shift, so we see settlement cracking where downspouts have been washing soil from under footings for decades — fixed with injection for stable cracks and piers for active settlement. Bowing block walls from saturated backfill get anchors or beams, and damp crawl spaces under raised ranches get full encapsulation.

Areas We Serve on Long Island

We cover Nassau and Suffolk counties, including Hempstead, Garden City, Mineola, Rockville Centre, Lynbrook, Valley Stream, Freeport, Merrick, Bellmore, Wantagh, Seaford, Massapequa, Levittown, Hicksville, Plainview, Syosset, Huntington, Babylon, Bay Shore, Islip, Smithtown, and the surrounding towns. Pricing for every service is in our NYC-area cost guide — then book your free assessment and get a firm written quote.

Frequently Asked Questions