Basement Waterproofing in Long Island (Nassau County), NY
Hempstead, Garden City, Freeport, Valley Stream, Great Neck, Mineola, Port Washington, Long Beach and more.
- Local, independent contractors
- Free referral service
- No obligation
Is your address covered?
Enter your ZIP code or city.
Local know-how
Wet basements and crawl spaces in Long Island
Long Island sits on sandy glacial soil over a shallow aquifer. In the South Shore communities near the bays, the water table can sit only a few feet below the surface, and heavy rain or a high tide pushes it even closer to basement floors. North Shore homes on hillsides deal more with surface runoff and wall seepage.
Many Nassau County homes were built between the 1920s and 1960s with full basements that are now finished living space, which makes any leak expensive. Partner contractors install interior drainage, sump pumps with backups, crack repairs and dehumidification systems.
How it works
Get help in three simple steps
- Call usTell a waterproofing specialist what is happening in your basement. It takes about two minutes.
- Get matchedYou are connected with an independent, local contractor who serves your ZIP code.
- Get your basement fixedThe contractor looks at your basement, explains your options and gives you a price. You decide – no obligation.
Services
What we help with
Basement Waterproofing
Stop basement leaks for good.
Learn more →Sump Pump Installation
New sump pumps, replacements and battery backups installed by local contractors.
Learn more →Foundation Crack Repair
Leaking wall cracks, horizontal cracks and bowing basement walls: what they mean, how they are repaired and what it costs.
Learn more →Crawl Space Encapsulation
Damp, moldy or smelly crawl space? How crawl space encapsulation, drainage and dehumidifiers work and what they cost.
Learn more →French Drains & Yard Drainage
French drains, downspout extensions and grading keep water away from your foundation.
Learn more →Basement Mold & Humidity
Musty basement? Mold on walls or belongings? How moisture control, dehumidifiers and waterproofing stop basement mold from coming back.
Learn more →Service area
Communities we serve
- Albertson
- Amityville
- Atlantic Beach
- Babylon
- Baldwin
- Bay Shore
- Bayport
- Bayville
- Bellmore
- Bethpage
- Blue Point
- Bohemia
- Brentwood
- Brightwaters
- Carle Place
- Cedarhurst
- Centereach
- Centerport
- Central Islip
- Cold Spring Harbor
- Commack
- Copiague
- Coram
- Deer Park
- East Islip
- East Meadow
- East Northport
- East Norwich
- East Rockaway
- East Setauket
- Elmont
- Farmingdale
- Farmingville
- Floral Park
- Franklin Square
- Freeport
- Garden City
- Glen Cove
- Glen Head
- Glenwood Landing
- Great Neck
- Great River
- Greenlawn
- Greenvale
- Hauppauge
- Hempstead
- Hewlett
- Hicksville
- Holbrook
- Holtsville
- Huntington
- Huntington Station
- Inwood
- Island Park
- Islandia
- Islip
- Islip Terrace
- Jericho
- Kings Park
- Lake Grove
- Lawrence
- Levittown
- Lindenhurst
- Locust Valley
- Long Beach
- Lynbrook
- Malverne
- Manhasset
- Massapequa
- Massapequa Park
- Medford
- Melville
- Merrick
- Mill Neck
- Miller Place
- Mineola
- Mount Sinai
- Nesconset
- New Hyde Park
- North Babylon
- Northport
- Oakdale
- Ocean Beach
- Oceanside
- Old Bethpage
- Old Westbury
- Oyster Bay
- Patchogue
- Plainview
- Point Lookout
- Port Jefferson
- Port Jefferson Station
- Port Washington
- Rockville Centre
- Ronkonkoma
- Roosevelt
- Roslyn
- Roslyn Heights
- Saint James
- Sayville
- Sea Cliff
- Seaford
- Selden
- Smithtown
- Stony Brook
- Syosset
- Uniondale
- Valley Stream
- Wantagh
- West Babylon
- West Hempstead
- West Islip
- West Sayville
- Westbury
- Williston Park
- Woodbury
- Woodmere
- Wyandanch
Show all 126 ZIP codes served
11001, 11003, 11010, 11020, 11021, 11023, 11024, 11030, 11040, 11042, 11050, 11096, 11501, 11507, 11509, 11510, 11514, 11516, 11518, 11520, 11530, 11542, 11545, 11547, 11548, 11549, 11550, 11552, 11553, 11554, 11556, 11557, 11558, 11559, 11560, 11561, 11563, 11565, 11566, 11568, 11569, 11570, 11572, 11575, 11576, 11577, 11579, 11580, 11581, 11590, 11596, 11598, 11701, 11702, 11703, 11704, 11705, 11706, 11709, 11710, 11714, 11715, 11716, 11717, 11718, 11720, 11721, 11722, 11724, 11725, 11726, 11727, 11729, 11730, 11731, 11732, 11733, 11735, 11738, 11739, 11740, 11741, 11742, 11743, 11746, 11747, 11749, 11751, 11752, 11753, 11754, 11755, 11756, 11757, 11758, 11762, 11763, 11764, 11765, 11766, 11767, 11768, 11769, 11770, 11771, 11772, 11776, 11777, 11779, 11780, 11782, 11783, 11784, 11787, 11788, 11790, 11791, 11793, 11794, 11795, 11796, 11797, 11798, 11801, 11803, 11804
FAQ
Questions from Long Island homeowners
Other service areas:
How much does basement waterproofing cost in Long Island?
Crack repairs typically start at a few hundred dollars. A full interior drainage system with a sump pump usually costs $4,000–$12,000, and crawl space encapsulation $5,000–$15,000, depending on the home. Your contractor gives you an exact price.
Does it cost anything to call?
No. Our referral service is free for homeowners, and you are never obligated to hire anyone.
How do I know if my address is covered?
Enter your ZIP code on this page or simply call. The specialist will confirm right away.
Get your basement dry.
Call now and get connected with a local contractor in Long Island.
- Local, independent contractors
- Free referral service for homeowners
- No obligation to hire
One call connects you with a contractor who serves your area.