Find a pro
Find a licensed water heater installer on Long Island
What water heater installers do
A water heater installer replaces tank and tankless water heaters, gas, electric or heat pump, with the venting, gas or electrical connection and safety valves each one needs.
- No hot water, or a tank that leaks.
- A water heater more than a decade old.
- A switch from oil or gas to electric or heat pump.
Who licenses water heater installers on Long Island
- On plumbing licenses, including those held by water heater installers, New York's Business Express site directs people to the local plumbing board for each area's requirements.
Suffolk County
- For the plumbing on a water heater replacement, the Suffolk licenses are Master Plumber and Restricted Plumber, both issued by Consumer Affairs.
- Suffolk's application for a restricted license offers LP Gas and Natural Gas categories within Restricted Plumbing.
- A home improvement license does not cover the plumbing on a Suffolk water heater replacement, because the county's home improvement law excludes the plumbing field.
Nassau County
- Nassau's cities, towns and villages, not the county, license the plumbers who install water heaters there, according to county Consumer Affairs.
Step by step: how to check a water heater installer's license in Suffolk or Nassau.
Town by town
Each town page quotes that town's own rules for water heater replacement, with the date we read them.
| Town or city | County | What the town says |
|---|---|---|
| Town of Oyster Bay | Nassau County | Oyster Bay requires a Town-licensed plumber on any new water heater permit. |
| City of Glen Cove | Nassau County | In Glen Cove, only a City-licensed plumber may complete the plumbing permit application. |
| City of Long Beach | Nassau County | Only a City-licensed plumber may do plumbing in Long Beach; homeowners cannot do it themselves. |
| Town of Southampton | Suffolk County | Tankless oil or gas water heaters appear as items on Southampton's plumbing application. |
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.)
Water heater prices turn on the type and size, the fuel, venting and electrical or gas changes, and removal of the old tank. See the water heaters 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?
- Does the replacement need a permit and an inspection, and who files it?
- What size and type fits the house, and how is it vented?
- Is the expansion tank, the relief valve and the drain pan included?
- What do the warranties cover, from the manufacturer and from you?
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 water heater installers as they join our network. You choose who to hire, and you never pay Revival.
Water Heater Installers by town
- Water heaters in Oyster Bay (Nassau County)
- Water heaters in Glen Cove (Nassau County)
- Water heaters in Long Beach (Nassau County)
- Water heaters in Southampton (Suffolk County)
Guides
Questions homeowners ask
Do I need a permit to replace a water heater on Long Island?
Many towns require one. The town pages below quote each town's rules.
Who can install a water heater on Long Island?
Usually the licensed plumber your town requires, plus the gas or electrical trade for the connection.
How does Revival help with a water heater?
A free call to pin down the job, then introductions to licensed installers as they join our network.
Sources
Every fact on this page comes from these official pages. Rules and fees change, so confirm with the office before you file anything.
- New York State Business Express, plumbing licensing (read 2026-11-03)
- Suffolk County Consumer Affairs, Licensing and Enforcement (read 2026-11-03)
- Suffolk County Consumer Affairs, Restricted License Application (CA-L11) (read 2026-11-03; page dated 3/26)
- Suffolk County Consumer Affairs, Home Improvement License Law (PDF) (read 2026-11-03; page dated 5/25)
- Nassau County Consumer Affairs, Plumber and Electrician Complaints (read 2026-11-03)
- Town of Oyster Bay, Heating Units permit checklist (PDF) (read 2026-11-03; page dated revision of 06/20/2024)
- City of Glen Cove, Building Department, and the documents it links: Building Permit Application, Building Permit Application Checklist (rev 11/2020) and Fee Schedule (As Amended 12/23/2024; linked as Effective 03/18/25) (read 2026-11-03)
- City of Long Beach, Building Department (read 2026-11-03)
- Town of Southampton, Plumbing Application (read 2026-11-03; page dated 06-2025)
- New York State Department of Labor, Occupational Wages (Long Island region, wages updated to the first quarter of 2026) (read 2026-11-03)
Checked 2026-11-03. Facts come only from the official pages listed, read on that date.
Talk the job through before you call anyone
Tell us about the house and the job in about four minutes. Revival calls you, free, to go over the scope, the budget, the timing and your town's permit office. Contractor matches open as our first licensed partners sign.