The City issues tests for plumbers and licenses master plumbers. If you have qualified on the Department of Citywide Administrative Services plumbing examination, you are eligible to apply for a master plumber license from the Department of Buildings (DOB).

You must submit any new application, renewal, or reissuance online through DOB NOW: Licensing.


Learn how to become a master plumber.

Submit license filings, register for DOB NOW: Licensing, or get additional information.

Get help with Department of Buildings Self-Service Tools.

By Phone

Call 311 or 212-NEW-YORK (212-639-9675) for help.

Starting on June 3, 2024, all existing and new DOB NOW users are required to have an NYC.ID account.

  • Users will complete a one-time process of creating an NYC.ID account
  • An NYC.ID account is required to access DOB NOW:
    • Build
    • Safety
    • BIS Options
    • Licensing
  • DOB NOW: Inspections and eFiling account registration is not changing and will not require an NYC.ID account

See NYC.ID announcement.

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