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Licensed master plumbers in Duluth, MN

71 individuals with a Minnesota DLI master or restricted master plumber license list Duluth as their city (DLI file downloaded November 4, 2026).

Read this before you call. These are individuals, not businesses. Minnesota law says no one may perform or offer to perform plumbing work, with or without pay, without a plumbing contractor license (Minn. Stat. 326B.46), and a contractor license is a separate license from a master plumber license. Many master plumbers work for the contractors listed in this directory. Ask whether the person holds a plumbing contractor license or which licensed contractor they work for, then check it with DLI. See who may do plumbing work.

Individuals with an issued license and a phone number in the DLI file. Most master plumber licenses in the file expire December 31, 2026, so a license may show as renewed or lapsed after that date; check DLI's lookup. Street addresses are not published. To be removed, use the removal form.