Colorado Plumbing License Requirements
Yes. Colorado licenses plumbers through the Colorado State Plumbing Board (DORA DPO). It issues apprentice, journeyman, master and contractor credentials. A journeyman license takes 6,800 hours of work experience.
State plumber license · By BrazeJobs Team · Updated
License tiers
| Apprentice | Registration |
| Journeyman | Journeyworker (plus Residential) |
| Master | State license (5 years / 8,500 hours) |
| Contractor | Plumbing contractor registration |
Requirements
| Journeyman experience | 6,800 (4 years); Residential 3,400 |
| Exam | PSI exam |
| Renewal | 2 years |
| Continuing education | 8 hours each year (16 per cycle) |
| Local license | No (state license covers) |
| Board | Colorado State Plumbing Board (DORA DPO) |
Exam
| Exam provider | Private testing agency (not named) |
| Passing score | 70% |
Plumbing Board: exams in English only through a private testing agency; 70% overall to pass.
- Source: dpo.colorado.gov · checked November 6, 2026
Licensed in another state or the military
| Military spouses | Temporary no-fee license (valid 6 years) for spouses and dependents of military stationed in Colorado with a good-standing out-of-state credential (HB 24-1097) |
- Source: dpo.colorado.gov · checked November 6, 2026
Apprenticeship
| Registering agency | State Apprenticeship Agency |
- Source: apprenticeship.gov · checked November 6, 2026
Plumbing code
| Code in force | IPC (edition not stated by board) |
Plumbing Board exams based on currently adopted IPC and board rules; edition not on board pages
- Source: dpo.colorado.gov · checked November 5, 2026