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MP Master Plumber License (Colorado)

Colorado has 4,966 active MP Master Plumber holders in the state file as of 2026-10-271, the 2nd-largest of 4 classes with at least 200 holders.

Active holders
4,966
26.9% of active Colorado licenses

What does the Colorado Master Plumber license require?

Plumbing contractor registration: the contractor must be, or employ full-time, a master plumber in charge of all plumbing work (a master can serve only one contractor). Individual licenses: Master, Journeyworker, Residential Plumber; apprentice registration; water conditioning contractor/installer/principal registrations. Since July 1, 2025 contractors must show their registration number and the master plumber's number on vehicles, bills, bid sheets and websites.2

Exam

Plumber licenses by state examination (CRS 12-155-110).2

Bond

No surety bond stated for plumbing contractor registration (CRS 12-155-108(3)).2

All Colorado license requirements

How do you check a MP license?

Search by license number or business name on the Colorado license lookup, which reads the same state file.

Sources

  1. CO DORA via data.colorado.gov (7s5z-vewr) (dpo.colorado.gov, 2026-10-27)
  2. Division of Professions and Occupations: classes (leg.colorado.gov)
  3. Division of Professions and Occupations - Plumbing Board (dpo.colorado.gov)