How to Become a Plumber in Colorado?
From high-altitude mountain resorts facing freezing winter pipes to booming residential developments across the Denver metro area, Colorado has a tremendous, sustained demand for skilled plumbing professionals. In the Centennial State, plumbing is a licensed trade regulated by the Colorado State Plumbing Board under the Department of Regulatory Agencies (DORA) Division of Professions and Occupations. Becoming a licensed plumber in Colorado requires completing registered apprenticeship training, logging documented on-the-job hours, and passing the state Journeyman Plumber exam.
Colorado DORA Licensing Tiers and Apprenticeship Registration
In Colorado, the path toward becoming a licensed plumbing professional follows a structured, three-tier licensing progression: Apprentice, Journeyman Plumber, and Master Plumber. Anyone performing plumbing work who is not already a licensed journeyman or master must be formally registered with DORA as a Plumbing Apprentice before touching a wrench on a jobsite.
Apprenticeship registration requires being at least sixteen years old, working under the direct, on-site supervision of a licensed Journeyman or Master Plumber, and submitting an annual registration through DORA's online licensing portal. Colorado enforces strict supervisor-to-apprentice ratios on commercial and residential jobsites, ensuring apprentices receive comprehensive, hands-on safety mentorship while learning pipefitting, venting, and drainage fundamentals.
Examine Colorado DORA plumbing licensing tiers, experience requirements, and supervisory scopes:
| Licensing Tier | Supervised Experience Required | Classroom Instruction | Authorized Scope of Work |
|---|---|---|---|
| Registered Apprentice | Zero prior experience required | Enrolled in trade school / union classes | Performs plumbing under direct on-site supervision |
| Residential Plumber | 2 Years (3,400 documented hours) | Focuses on 1- and 2-family dwellings | Installs plumbing in single-family residential homes |
| Journeyman Plumber | 4 Years (6,800 documented hours) | Core IPC code and blueprint training | Commercial, industrial, and residential installations |
| Master Plumber | 5 Years (8,500 total hours, 1 yr Journeyman) | Advanced design, hydraulics, business law | Plans plumbing systems, pulls municipal permits |
| Plumbing Contractor | Requires active Master Plumber on staff | Workers' comp & liability insurance | Operates independent plumbing contracting business |
Review the state statutory licensing classifications and experience thresholds in Colorado:
Union vs. Non-Union Apprenticeships and Classroom Education
Aspiring plumbers in Colorado generally choose between two primary apprenticeship pathways: union apprenticeships or non-union (merit shop) programs. Union apprenticeships are administered through the United Association (such as UA Local 3 in Aurora/Denver or UA Local 58 in Colorado Springs). Union programs offer paid four- to five-year apprenticeships featuring debt-free classroom instruction, guaranteed wage step-increases, health benefits, and retirement pension plans.
The non-union route is commonly organized through organizations like the Associated Builders and Contractors (ABC) Rocky Mountain Chapter or the Plumbing-Heating-Cooling Contractors Association (PHCC). Alternatively, individuals can secure direct employment with a licensed local plumbing contractor who registers them with DORA. Regardless of the route, apprentices must complete related technical classroom instruction covering plumbing mathematics, isometric blueprint drafting, water supply sizing, and the International Plumbing Code (IPC).
Compare union and open-shop plumbing apprenticeship pathways across the state of Colorado:
| Apprenticeship Pathway | Administering Organization | Program Duration | Key Features & Benefits |
|---|---|---|---|
| Union Apprenticeship | UA Local 3 / UA Local 58 | 5 Years (10,000 total hours) | Free tuition, negotiated wage steps, excellent pension |
| Non-Union (Merit Shop) | ABC Rocky Mountain / PHCC | 4 Years (8,000 total hours) | Flexible contractor matching, merit-based promotions |
| Direct Contractor Hire | Independent Licensed Master Plumber | 4 Years (6,800 documented hours) | Immediate job placement; apprentice pays school tuition |
| Community College Degree | Red Rocks CC / Emily Griffith Tech | 2-Year Associate / Certificate | Classroom credits apply toward theoretical knowledge |
Review the comparison between union and non-union apprenticeship models in Colorado:
Passing the Journeyman Exam and Launching Your Career
To qualify for the Colorado Journeyman Plumber examination, applicants must submit an Affidavit of Experience proving at least four years (a minimum of 6,800 clock hours) of practical plumbing installation experience, signed and verified by a licensed Master Plumber. The state examination is developed and administered by PSI Testing Centers on behalf of DORA.
The Journeyman exam consists of an open-book multiple-choice section covering the International Plumbing Code (IPC), International Fuel Gas Code (IFGC), and Colorado plumbing amendments, alongside a practical isometric drawing section where candidates must design compliant drain-waste-vent (DWV) piping schemes. Once licensed, journeymen enjoy exceptional earning power across Colorado's thriving construction sector, with the ability to advance to Master Plumber after one additional year.
Mastering trade skills and state code requirements ensures a rewarding, lifelong plumbing career.
How to Become a Licensed Plumber in Colorado in 5 Steps
Follow these practical apprenticeship, licensing, and examination steps to become a plumber in Colorado.
Register as an Apprentice with Colorado DORA
Submit your online registration form through the Colorado State Plumbing Board portal before starting work.
Join an Apprenticeship Program or Find an Employer
Enroll in a union (UA Local 3/58) or non-union (ABC/PHCC) program, or work under a licensed master contractor.
Log 6,800 Hours of Supervised On-the-Job Experience
Work for four full years under licensed journeymen and masters, maintaining accurate payroll logs of your hours.
Complete Related Technical Classroom Instruction
Attend evening trade school classes covering the International Plumbing Code, gas pipe sizing, and isometric drafting.
Pass the Colorado Journeyman Plumbing Exam
Submit your experience affidavit to DORA, schedule your PSI testing exam, and pass the code and isometric drawing tests.
Frequently Asked Questions (8 Questions Answered)
Q1: How long does it take to become a plumber in Colorado?
It takes four years (a minimum of 6,800 documented hours) of supervised apprenticeship experience to qualify for the Journeyman Plumber exam.
Q2: What plumbing code does Colorado enforce?
Colorado currently enforces the International Plumbing Code (IPC) and International Fuel Gas Code (IFGC), alongside specific Colorado state amendments.
Q3: Do apprentices have to register with the state in Colorado?
Yes, Colorado law mandates that all plumbing apprentices register with DORA before performing any plumbing work on job sites.
Q4: How much does a journeyman plumber make in Colorado?
Journeyman plumbers in Colorado earn an average of $65,000 to $95,000 annually, with top commercial and mountain resort plumbers earning over $100,000.
Q5: Is the Colorado plumbing exam open book?
Yes, the Colorado Journeyman and Master exams administered by PSI are open-book, utilizing the approved International Plumbing Code book.
Q6: Can a residential plumber work on commercial buildings in Colorado?
No, a Residential Plumber license is legally restricted to one- and two-family residential dwellings; commercial work requires a Journeyman license.
Q7: What is required to become a Master Plumber in Colorado?
You must hold an active Journeyman license for at least one full year and document a total of five years (8,500 hours) of plumbing experience.
Q8: Does Colorado offer plumbing license reciprocity with other states?
No, Colorado does not maintain direct automatic reciprocity agreements, though experienced out-of-state plumbers can apply via license endorsement.
Final Thoughts & Key Takeaways
In conclusion, understanding how to become a plumber in colorado? provides essential clarity, practical strategies, and actionable advice. By incorporating these foundational insights, adhering to verified safety guidelines, and following structured best practices, you ensure reliable, long-term outcomes while preventing common mistakes. Stay informed, consult certified professionals when needed, and maintain consistent quality care.