Find a licensed plumber on Long Island

What plumbers do

A plumber installs and repairs the water supply, the drains and vents, fixtures and water heaters, and finds and fixes leaks.

• A leak, a burst pipe or a water heater that failed.
• A drain or sewer line that keeps backing up.
• New fixtures, a moved bathroom, or a kitchen with a new layout.
• Low water pressure or old supply pipes.

Who licenses plumbers on Long Island

• Local governments regulate the plumbing trade in New York under Article 4 of the General City Law. The state's Business Express site tells readers to contact their local plumbing board for licensing requirements.
• An exam is required to obtain a certificate of competency for the plumbing trade or business, the state says.
• Paid plumbing work that disturbs painted surfaces in a home built before 1978 is covered by the EPA lead rule, which requires the person doing it to be certified.

Suffolk County

• Suffolk Consumer Affairs issues plumbing licenses, and its license types include Master Plumbers and Restricted Plumbers.
• Only a member, officer, owner or partner of the business may apply for a Suffolk master plumbing license, the county's application says.
• Suffolk master plumbing applicants must document 7 of the last 10 years working for a licensed employer in the field, on forms signed and notarized by current or former employers.
• After the applicant passes the exams and the licensing board approves, Suffolk requires business insurance to be in place when the master license is issued.
• The Suffolk master plumbing application carries a non-refundable application fee of $200.00.

Nassau County

• Nassau County Consumer Affairs says plumbers who operate in the county are licensed by its cities, towns and villages.
• Nassau's home improvement license law does not apply to a plumber who must meet state or local competency standards, while acting only within the scope of that plumbing license.

Step by step: how to check a plumber's license in Suffolk or Nassau.

Town by town

Each town page quotes that town's own rules for plumbing work, with the date we read them.

What it costs

Labor is a large part of any price. Long Island plumbers, pipefitters and steamfitters earn a median $80,988 a year, from about $55,904 at entry level to $110,956 with experience. (New York State Department of Labor, wages updated to the first quarter of 2026.)

Plumbing prices turn on access (open walls, finished ceilings, a crawl space), the age of the pipes, whether fixtures move, and the permit and inspections the job needs. See the plumbing cost guide.

What to ask before you hire

• Your county license number, so I can check it before I sign?
• A certificate of insurance sent to me by your insurer, not a photo?
• Who files the plumbing permit, and who books the inspection?
• Does the price include opening and closing walls or floors, and who patches them?
• For a water heater: what size and fuel, and how is it vented?
• What warranty covers your labor, and what does the manufacturer cover?

How Revival helps

Request a free call. Revival goes over the job and the permit with you, checks licenses and insurance, and introduces up to two vetted, licensed plumbers as they join our network. You choose who to hire, and you never pay Revival.