Find a licensed plumber in Smithtown, NY

Who licenses plumbers in Smithtown

• 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.

State rules and the lookup steps: how to check a plumber's license.

What the Town of Smithtown requires

• Plumbing work with no construction is filed on two signed, notarized applications describing it, along with copies of each contractor's Suffolk County license photo ID.
• Gas work can be filed as its own plumbing permit when no construction is involved, or added to an existing application or permit.
• Homeowners doing their own plumbing or electric work must provide the CE-200 Certificate of Attestation of Exemption.

The Town of Smithtown Building Department handles permits ((631) 360-7520). Our Town of Smithtown permit guide covers how to apply, inspections and certificates.

Homes in Smithtown: what the Census shows

Across the Town of Smithtown, villages included, the median home was built in 1968, and 24% of homes were built before 1960. A home built before 1960 is now more than 65 years old, so ask what the supply and drain pipes are made of before work is priced. 86% of homes here are single-family detached houses, and 89% are owner-occupied.

What plumbing work costs here

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.) Prices come from written estimates; more in the plumbing cost guide.

Before you hire in Smithtown

• Ask for the license number the work needs here (see who licenses plumbers above), and check it before you sign.
• Ask who files with the Town of Smithtown Building Department, and who books the inspections.
• 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?