Find a licensed basement waterproofing company in Long Beach, NY

Who licenses basement waterproofing companies in Long Beach

• Nassau's Administrative Code names waterproofing as home improvement work, and no one may run a home improvement business in the county without a license.
• Waterproofing is on Nassau County Consumer Affairs' list of who must be licensed.

State rules and the lookup steps: how to check a basement waterproofing company's license.

What the City of Long Beach requires

• The City requires a floodplain development permit application to show the proposed elevation, relative to mean sea level, of the lowest floor, basement or cellar included, of any new or substantially improved structure.
• The City Code makes it unlawful to undertake any development in an area of special flood hazard without a valid floodplain development permit. The Building Commissioner, or an appointed representative, grants or denies those permits as local administrator.
• The City Code defines substantial damage as damage of any origin where restoring the structure to its before-damaged condition would cost 50% or more of its pre-damage market value.
• The City states that FEMA maps have designated the entire City of Long Beach a flood zone since September 11, 2009. It says the higher-risk AE zone covers virtually all of Long Beach, and lenders will require flood insurance there.
• Through the City's participation in the Community Rating System, eligible Long Beach policyholders receive a 15% discount on flood insurance premiums.

The City of Long Beach Building Department handles permits ((516) 431-1005). Our City of Long Beach permit guide covers how to apply, inspections and certificates.

Homes in Long Beach: what the Census shows

Across the City of Long Beach, the median home was built in 1961, and 48% of homes were built before 1960, 23% before 1940. 66% of homes here are owner-occupied, and 38% are single-family detached houses.

What basement waterproofing costs here

Labor is a large part of any price. Long Island construction laborers earn a median $58,875 a year, from about $39,468 at entry level to $79,154 with experience. Cement masons and concrete finishers earn a median $65,026 a year, from about $53,234 at entry level to $82,344 with experience. (New York State Department of Labor, wages updated to the first quarter of 2026.) Prices come from written estimates; more in the basement waterproofing cost guide.

Before you hire in Long Beach

• Ask for the license number the work needs here (see who licenses basement waterproofing companies above), and check it before you sign.
• Ask who files with the City of Long Beach Building Department, and who books the inspections.
• Where is the water coming from, in writing, before you sell me a system?
• Would grading, gutters or downspout extensions fix it for less?