Colorado Plumber License Requirements

Colorado regulates plumbing through DORA’s State Plumbing Board. The statute recognizes plumbing apprentices and licenses residential, journeyworker, and master plumbers; a plumbing contractor is a separate registration tied to a master plumber. The Board sets the current experience and examination requirements, subject to statutory maximum practical-experience amounts: 3,400 hours for residential, 6,800 for journeyworker, and 8,500 for master applicants.

Regulatory Body

Colorado State Plumbing Board (DORA) administers and enforces this credential under the authority of Colorado Revised Statutes Title 12, Article 155. The State Plumbing Board licenses plumbers and registers plumbing contractors statewide.

Official portal: https://dpo.colorado.gov/Plumbing/LicensingServices

Eligibility Requirements

This guide does not establish a minimum applicant age; confirm any age requirement with the issuing authority. Check the current application for identification and tax-number requirements. Use DORA’s current application for residency, identity, and entity requirements.

Good moral character

The Board licenses applicants who demonstrate competence and qualification through examination and experience.

Background investigation

Use the current DORA application for disclosure and background-check requirements; do not rely on unsourced blanket fingerprint claims.

Experience and Education

No fixed number of years of experience is set out in the cited sources for this credential; instead, the controlling requirement is The Board establishes the minimum experience by rule. Statute caps the practical experience it may require at 3,400 hours for residential, 6,800 for journeyworker, and 8,500 for master licensure..

Accepted proof of experience or eligibility

Submit the current DORA experience records and any annual hours reporting required by the Board.
Provide the evidence required by the current application for the license level sought.
A Board-approved community-college or trade-school plumbing-program graduate receives one year of work-experience credit under statute.

Education substitution

A graduate of a Board-approved community-college or trade-school plumbing program receives one year of experience credit; confirm any other current Board rule credit before applying.

Exam Requirements

Testing provider or authority: State Plumbing Board examination process. The following examination requirements cover the pathways described in this guide; follow each part's classification, waiver, and local-scope conditions. Unpublished format details do not remove an examination requirement:

Residential, journeyworker, or master plumbing examination for the license level sought — question count: confirm with the authority, timing: confirm with the authority, passing score: confirm in the current candidate bulletin

Examination fee: Use the current DORA application and testing information for examination and license fees.

Retake policy: DORA publishes applications and forms through its licensing-services page; confirm current examination provider, score, scheduling, and retake terms directly with DORA.

Insurance and Bonds

The cited materials impose no contractor license bond for this credential. Bear in mind that specific contracts, permits, or public works can still require their own bonds.

General liability

The Article 155 individual-license provisions do not state a general-liability minimum. Confirm contractor-registration and local-permit requirements for the business and job jurisdiction.

Workers' compensation

Workers’ compensation obligations arise under separate Colorado law and depend on the business and workforce. Confirm them with the appropriate state authority.

Additional financial requirements

The individual licensing statute does not state a financial-statement requirement.

Fee Schedule

Fee	Amount
Application	No separate amount recorded; confirm in the fee guidance
Initial license	No separate amount recorded; confirm in the fee guidance
Renewal cycle varies by jurisdiction	No separate amount recorded; confirm in the fee guidance

To turn these board fees into a realistic year-one budget — bond premium, liability insurance, and exam prep included — open the cost calculator preloaded for Colorado plumber.

Renewal and Continuing Education

Renewal of the Colorado Master, Journeyworker, Residential, and Apprentice Plumber — State Plumbing Board is not on a single statewide clock; defer to the issuing board or local jurisdiction. The cited state source set does not list a separate statewide renewal fee. HB 24-1344 changes the license term for licenses issued or renewed on or after March 1, 2027 to three years or another period set by the DORA director. Check the live DORA renewal instructions.

Continuing education: Confirm the current DORA renewal notice and Board rules; this guide does not retain unsupported fixed CE-hour or renewal-cycle claims.

Downloadable Asset

2026 Colorado Plumber License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Reciprocity

The NASCLA Accredited Examination is not accepted by Colorado for this classification.

Reciprocal State	Accepted Exam	Conditions
No formal bilateral reciprocity agreements identified.

Do not rely on claimed bilateral plumber reciprocity without written current confirmation from the State Plumbing Board.

Weighing more than one jurisdiction? The national hub compares published Plumber license requirements by state — exam, bond, fee, and experience thresholds side by side.

Plumber Licensing in Neighboring States

Contractors working near a state line, or weighing where to qualify first, should compare Colorado's requirements against the bordering jurisdictions before committing to an application:

Arizona Plumber License Requirements — Arizona Plumbing Contractor — C-37 Commercial / CR-37 Dual / Residential Plumbing Classifications
Kansas Plumber License Requirements — Kansas Plumber — City and County Licensure
Nebraska Plumber License Requirements — Nebraska Plumber — City or Village License
New Mexico Plumber License Requirements — New Mexico MM-1 Plumbing Contractor and JP Journeyman Plumber
Oklahoma Plumber License Requirements — Oklahoma Plumbing Journeyman and Contractor License
Utah Plumber License Requirements — Utah Master Plumber License and P200 Contractor License
Wyoming Plumber License Requirements — Wyoming Plumbing Requirements (Local Credentials and Permits)

Step-by-Step Application Roadmap

Choose the correct credential level. Colorado distinguishes apprentice registration from residential, journeyworker, and master plumber licenses.
Document the Board-required experience. Use current DORA forms. The statutory maximum experience the Board may require is 3,400/6,800/8,500 hours by license level.
Apply and complete the examination. Meet the State Plumbing Board’s current application and testing requirements for the selected credential.
Register the contracting business when needed. A plumbing contractor is separately registered and must comply with the master-plumber relationship and current DORA requirements.
Check the local permit authority. State licensure does not eliminate local permitting or inspection requirements.

Application Checklist

The items below are the ones worth confirming before the application is filed with DORA:

Correct DORA credential level selected
Current DORA experience reporting and application records
Board-approved education evidence if claiming the one-year statutory credit
Required State Plumbing Board examination
Separate plumbing-contractor registration when operating as a contractor
Local permit and inspection requirements checked

Common Filing Mistakes

Drawn from the board instructions and sources cited on this page, the pitfalls below are the ones most likely to slow down or sink a Colorado Plumber application.

Using outdated 10,500-hour or classroom-hour claims

The current statute caps practical experience at 3,400, 6,800, or 8,500 hours by credential and does not impose the old 288-classroom-hour rule stated in this guide before audit.

Confusing individual licensure with contractor registration

A plumbing contractor is separately registered and relies on the master-plumber relationship required by Article 155.

Assuming state licensure replaces local permits

Local authorities retain permitting and inspection roles.

Study and Reference Materials

What follows are the regulator-cited and commonly used preparation references for this trade. They appear here for convenience only; CLR takes no compensation for them.

State Plumbing Board licensing services and forms — Colorado DORA. Official starting point for applications, annual experience reporting, renewal, and current fee materials.
Colorado Revised Statutes Title 12, Article 155 — Colorado General Assembly. Controlling statute for credentials, contractor registration, experience limits, and renewals.

Other Colorado Trade Licenses

CLR covers other Colorado trades as well — the published guides below may be more relevant:

Frequently Asked Questions

What plumber credentials does Colorado recognize?

Colorado regulates apprentices and licenses residential, journeyworker, and master plumbers. A plumbing contractor is separately registered.

How much practical experience can Colorado require?

The statutory maximum is 3,400 hours for residential, 6,800 for journeyworker, and 8,500 for master applicants; the Board sets the current minimum by rule.

Does a plumbing-school program help?

A graduate of a Board-approved community-college or trade-school plumbing program receives one year of work-experience credit.

Are contractor registration and master licensure the same?

No. The statute treats a plumbing contractor as a separate registration tied to the master-plumber requirements.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-09-04 · Next scheduled review 2026-12-03

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Corrections and presentation updates

2026-09-30: Corrected examination detection when format details are unpublished and updated the summary layout and requirements score. Source-check dates are unchanged.
2026-09-08: Shared template updated to distinguish unspecified eligibility requirements, retain cost qualifications, and use consistent headings. Source-check dates are unchanged by presentation updates.
2026-09-21: Local-only guides now use a compliance-focused structure and terminology instead of implying a statewide license application. Source-check dates are unchanged by this presentation update.