New Hampshire bathroom remodel: plumbing work must be performed by a journeyman plumber 'under the direction of a master plumber' (or by a master, who is the business) with the statutory scope ending at the first fitting beyond the foundation wall or 5 feet of pipe; electrical work at 30 volts or higher needs an active NH electrician license; no state contractor license exists. Every claim sourced and dated.
No statewide general-contractor license exists (verified absence) — The OPLC boards list (read 2026-10-05) contains no contractor, construction, general-contractor, home-improvement, roofing or remodeling board; the construction-relevant boards are the Electricians' Board, the Mechanical Licensing Board and the Home Inspectors board. No state-level general-contractor licence, registration or bond exists; building permits are issued by municipalities. S-NH-BOARDS-LIST
Plumber licences: journeyman under a master's direction; master is the business — RSA 153:27 verbatim: 'journeyman plumber' means any person who customarily performs the work of installing, maintaining, and repairing plumbing and drainage under the direction of a master plumber; 'master plumber' means any person, firm, corporation, or limited liability company that, as a business, hires or employs a person or persons to do plumbing work, or, without hiring any person, does that work as a principal business or as auxiliary to a principal business for its own account. Scope boundary (XIV): plumbing 'shall not apply beyond the first fitting beyond the foundation wall of the building or 5 feet of pipe from the building.' S-NH-RSA-153-27
Electrician license required to work with 30 volts or higher — Electricians' Board verbatim: 'An active and valid New Hampshire Electrician license is required to work with 30 volts or higher. Apprentices MUST register with the OPLC.' Classes: Apprentice (registered, learning under the direct supervision of a master or journeyman), Journeyman (employed by a NH licensed master electrician or an entity licensed pursuant to RSA 319-C:10), Master (the business class), plus the High/Medium Voltage trainee and licence and the Electrical Corporation. S-NH-ELEC-BOARD