Vanity move by the handyman service
The homeowner hired a handyman service to move her vanity to the other wall. Hank works alone, holds no plumbing license, and his business has no plumbing contractor license. The piping itself is installed correctly. What's the problem?
- Plumbing work done for others must be done by licensed plumbers working for a licensed plumbing contractor, so a handyman cannot install this drain, vent and water piping
- The work is legal as long as the homeowner pulls a homeowner plumbing permit for it
- Small jobs are exempt: a handyman may do plumbing on any contract under $15,000
- Nothing. This installation is compliant
Show the answer and the code reference
The answer
An unlicensed handyman is installing new drain, vent and water piping for a customer, which only licensed plumbers working for a licensed plumbing contractor may do.
Correct choice: 1. Plumbing work done for others must be done by licensed plumbers working for a licensed plumbing contractor, so a handyman cannot install this drain, vent and water piping
Minnesota licenses plumbing work. Under Minn. Stat. 326B.46, no individual may engage in or work at the business of a master or journeyworker plumber without a DLI license. A business that installs plumbing must have a licensed master plumber in charge of, and responsible for, its plumbing work, along with a contractor license, a bond of at least $25,000, and insurance. An unlicensed person may help with plumbing only as a registered apprentice or registered unlicensed individual, under the direct supervision of a licensed plumber employed by the same employer (Minn. Stat. 326B.47). Hank has none of these. The owner exemption doesn't help either, because it covers only plumbing the owner-occupant does personally. These rules exist because hidden drain, vent and water defects (bad slope, missing vents, cross-connections) can make people sick long after the wall is closed.
How to fix it
Stop the plumbing work. The homeowner hires a licensed plumbing contractor, which pulls the plumbing permit and has a licensed plumber check, correct as needed, and complete the rough-in before it is inspected. The handyman can still do the drywall and painting.
Code references
Minn. Stat. 326B.46, subd. 1 — Licensing, bond and insurance: license required
(a) No individual may engage in or work at the business of a master plumber, restricted master plumber, journeyworker plumber, or restricted journeyworker plumber unless licensed. An unlicensed person may do plumbing that meets the Plumbing Board's standards only on premises, or that part of premises, owned and actually occupied by the worker as a residence, unless a local ordinance forbids it. (b) A person in the business of planning, superintending, or installing plumbing must at all times have a licensed master plumber (or, in a city or town with a population of fewer than 5,000, a restricted master) in charge of its plumbing work and responsible for proper installation. (c) Except as subdivision 1a allows, no person may perform or offer to perform plumbing work, with or without compensation, without a contractor's license.
Drills citing 326B.46, subd. 1Minn. Stat. 326B.46, subd. 2 — Bond and insurance
Any person contracting to do plumbing work must give a bond to the state of at least $25,000 for the plumbing work it enters into in the state, and must carry the liability insurance this subdivision requires.
Drills citing 326B.46, subd. 2Minn. Stat. 326B.47 — Unlicensed individuals
A plumber's apprentice or registered unlicensed individual may assist in installing plumbing only under the direct supervision of a licensed master, restricted master, journeyworker, or restricted journeyworker plumber employed by the same employer, and may not supervise or assign plumbing work.
Drills citing 326B.47
Minnesota
This drill tests Minnesota plumbing licensing law (Minn. Stat. 326B.42 to 326B.49), which has no counterpart in the Uniform Plumbing Code. The installation rules themselves come from the Minnesota Plumbing Code (Minn. Rules ch. 4714, the 2018 UPC with Minnesota amendments, effective Dec. 17, 2021).
About the Minnesota Plumbing CodeCitation under review. Audited 2026-10-04 against search results quoting revisor.mn.gov (direct fetch still blocked). Subd. 1(a) holds the license requirement and owner exemption, subd. 1(b) the master-in-charge rule ('fewer than 5,000'), subd. 1(c) the contractor's license, subd. 1a the exemptions from the contractor license, and subd. 2 the $25,000 bond and insurance. The exact insurance limits were not confirmed and are deliberately not stated. The 326B.47 supervision rule was confirmed the same way.
Why the other choices are wrong
- The work is legal as long as the homeowner pulls a homeowner plumbing permit for it. The owner exemption in Minn. Stat. 326B.46 covers plumbing the owner-occupant does personally on the home she occupies. It does not extend to someone she hires, and a homeowner permit cannot cover a paid installer's work.
- Small jobs are exempt: a handyman may do plumbing on any contract under $15,000. The $15,000 certificate of exemption belongs to residential building contractor licensing (Minn. Stat. 326B.805), not plumbing. Plumbing licensing under 326B.46 has no dollar threshold.
- Nothing. This installation is compliant. Good-looking pipe does not fix who installed it. New drain, vent and water piping installed for pay is plumbing work that needs a licensed plumber and a licensed plumbing contractor.