Does New York License Plumbing Contractors? What the Business Needs Instead

Only locally.

New York has no statewide plumber license, so there is no statewide plumbing contractor license for a business to hold: plumbing licensing comes from the city or county where the business works.

State law still frames the trade.

General City Law Article 4, Plumbing and Drainage, provides for examining boards of plumbers in cities, and it defines an employing or master plumber as a person with a regular place of business who performs plumbing work personally or through journeymen plumbers in their employ — a definition of the employing or master plumber, not a state license.

In New York City, the license a plumbing business contracts under is the Department of Buildings' Licensed Master Plumber license; in Westchester County, plumbers must hold the county's own trade license.

No state agency is involved; the issuer is local.

In New York City, the Department of Buildings issues the Licensed Master Plumber license, and that license is the business credential: the licensee must be an officer, partner or sole proprietor of the business, and the business must have a place of business in New York City in a zoning-compliant (commercial) location.

Applications go through DOB NOW: Licensing — mandatory since February 23, 2026 — and include a background investigation; applicants have 1 year from the practical-exam notification to submit.

Our research records no classes on the Master Plumber license itself.

The neighboring Master Fire Suppression Piping Contractor license does carry classes (A, B or C), and its work excludes plumbing, domestic water and gas piping.

DOB also issues a Gas Work Qualification (Full and Limited routes) for gas piping work.

In Westchester County, the Department of Consumer Protection licenses plumbers county-wide.

In New York City the qualifier is the licensee — a named person, not the company.

The applicant must be an officer, partner or sole proprietor of the business, and at a corporation the licensee must hold at least 51% combined controlling interest.

That person must first qualify for the Master Plumber license: age 18 or older and, on the standard route, 7 years of total experience within the 10 years before applying, under a licensed master plumber in the U.S., including at least 2 years as a registered journeyman plumber.

Alternative routes: a mechanical engineering bachelor's degree plus 5 years within the last 7 (2 in NYC), or a New York licensed Registered Architect or Professional Engineer plus 3 years within 5 (1 in NYC).

The journeyman years come from a Journeyman Plumber registration — 5 years of full-time work under a licensed master plumber (at least 1 in NYC), or a NYS registered training program plus 1 year of NYC experience — and the Journeyman Plumber rules do not let plumbing experience count for the Journeyman Fire Suppression registration, or the reverse.

Our research did not capture Westchester's ownership or qualifier rules; ask the county.

The qualifier passes the Department of Buildings' own exams — with no state plumbing contractor license, our research found no separate state trade exam.

The written exam is multiple-choice on the NYC Construction Codes, rules and regulations, is closed-book, and takes a 70% score to pass; it costs $585.

The practical exam costs $530 and must be passed within 24 months of the written-exam notification.

Our research found no separate business-and-law exam for the Master Plumber license and no acceptance of an out-of-state exam — an unconfirmed absence in our sources, so have your qualifier candidate check DOB's current exam requirements before applying.

In Westchester County, plumbers qualify by county examination; our research did not capture the exam's content or vendor, so ask the county's licensing office.

For a New York City Master Plumber business, the floor is set by DOB's licensing guidelines: the business must carry General Liability, Workers' Compensation and Disability insurance, and general liability must be at least $1,000,000 per occurrence.

A master plumber business with no employees may file a CE-200 affidavit of exemption from the workers' compensation and disability requirements instead.

Our research did not capture a bond requirement for any credential on this page; bonds and insurance minimums change, so ask the office issuing your license what it currently requires before you bid work.

The NYC Master Plumber license costs $200 plus a $50 seal fee, and it runs on a 3-year term.

Renewal is $150 plus a $75 seal — $225 total — and requires an original 7-hour continuing education course certificate and a physical examination form (LIC62) completed within 90 days; late fees are $50 for 1–30 days late and $100 for 31 days to 1 year late.

Budget the exam fees too: $585 written and $530 practical.

Your journeyman-level staff pay $50 for a Journeyman Plumber registration.

For Westchester County, our research verified the examination requirement but did not capture a fee schedule, so ask the county's licensing office for current costs.

Not established in our research.

There is no statewide license for a reciprocity agreement to attach to, and for the NYC Master Plumber license our research found no reciprocity with other jurisdictions — an unconfirmed absence, so treat recognition of an out-of-state credential as an open question for the issuing office.

If you are moving a plumbing business into New York, ask the Department of Buildings — or the county office where you will work — what it accepts of your experience, exams and license.

Because the license sits on a person, a departing licensee is an ownership event, not just a staffing one: the replacement must be an officer, partner or sole proprietor of the business and, at a corporation, hold at least 51% combined controlling interest, on top of the master plumber experience and exam requirements.

Our research could not verify two rules that matter in that moment — whether one Master Plumber licensee may qualify more than one business, and the deadline to replace a departing licensee; the research points to NYC Administrative Code Title 28 Chapter 4 and 1 RCNY 104-26 as the likely home of those rules.

Ask DOB's licensing unit directly, and start recruiting a replacement licensee before your current one leaves so the business never contracts without one.

Two local systems are verified in our research.

New York City: the Department of Buildings issues the Licensed Master Plumber license, the Journeyman Plumber registration and a Gas Work Qualification for gas piping work, and its licenses are searchable through the Check License Status service at nyc.gov/buildings.

Westchester County: the Department of Consumer Protection licenses plumbers county-wide by examination, with a Plumbing Board and a list of continuing education providers; it also requires home improvement contractors to hold a county license; our research did not establish whether plumbing work falls under that license.

Beyond New York City and Westchester, our research did not verify other local plumbing licenses (for example in Nassau County, Suffolk County, Buffalo or Rochester), so ask the building or licensing department where your business will work.

For Westchester, the county's Trade Licenses Search is the public lookup.