Plumber License Requirements in New Hampshire
License RequiredLast verified March 9, 2026
Agency And Exam
Issuing agency: New Hampshire Office of Professional Licensure and Certification, Fuel Gas Fitting and Plumbers Board
Official licensing agency website
Exam provider: PROV
Reciprocity And License Levels
License levels
Apprentice PlumberJourneyman PlumberMaster Plumber
Reciprocity states
None listed
Notes
New Hampshire licenses plumbing through the OPLC Fuel Gas Fitting and Plumbers Board. The state's official plumbing exam candidate bulletin says candidates seeking a New Hampshire plumbing license must complete the licensing examination for either master or journeyman plumber, and board enforcement materials also reference apprentice registration and business-entity licensing. Verified against New Hampshire OPLC plumbing materials on 2026-03-09.