Plumbing License Requirements by State
Across the 50 states and DC, 37 license plumbers statewide, 8 license only plumbing contractors and 6 leave plumbing licensing to cities and counties.
State plumber license (37)
- Alabama
- Alaska
- Arkansas
- Colorado
- Connecticut
- Delaware
- District of Columbia
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Montana
- New Hampshire
- New Jersey
- New Mexico
- North Dakota
- Oklahoma
- Oregon
- Rhode Island
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin