Find a licensed basement waterproofing company in Babylon, NY

Who licenses basement waterproofing companies in Babylon

• Waterproofing is named in Suffolk County's home improvement law, and the law makes a county license mandatory for the businesses it regulates, unless exempt.
• Basements and waterproofing both appear on Suffolk Consumer Affairs' list of home improvement work.
• Work in the electrical and plumbing fields is excluded from Suffolk's home improvement definition.
• A waterproofing contractor working without a license in Suffolk is subject to arrest and prosecution, Consumer Affairs warns.

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

What the Town of Babylon requires

• Finishing a basement with sheetrock on the walls and flooring other than concrete requires a building permit.
• Town Code does not allow basement apartments, and a basement becomes an illegal apartment once a kitchen is added.
• A basement bedroom without a kitchen is allowed when the ceiling is at least 7 feet 6 inches high and the room has an egress window.
• Among its specific types of building permits, the Town lists an Emergency Repair Permit Application.
• The Town's building permit application can call for an elevation certificate.

The Town of Babylon Building Department (Division of Planning and Development) handles permits ((631) 957-3058). Our Town of Babylon permit guide covers how to apply, inspections and certificates.

Homes in Babylon: what the Census shows

Across the Town of Babylon, villages included, the median home was built in 1963, and 44% of homes were built before 1960. 78% of homes here are owner-occupied, and 74% 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 Babylon

• 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 Town of Babylon Building Department (Division of Planning and Development), 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?