How to Get a Plumbing License in Colorado (2025 Guide)

Dreaming of a stable, in-demand career with strong earning potential? Becoming a licensed plumber in Colorado could be your perfect path. But if you’re wondering how to get a plumbing license in Colorado, you’re not alone—many aspiring tradespeople feel overwhelmed by the process. Don’t worry: this guide breaks it down clearly, step by step, so you can start your plumbing career with confidence.

What Types of Plumbing Licenses Exist in Colorado?

Colorado offers three main plumbing license levels, each with distinct responsibilities and requirements:

1. Apprentice Plumber – Entry-level; works under direct supervision.
2. Journeyman Plumber – Can work independently on residential and light commercial projects.
3. Master Plumber – Authorized to design systems, pull permits, and supervise other plumbers.

Unlike some states, Colorado does not issue state-wide plumbing licenses. Instead, licensing is handled at the local (county or municipal) level. This means requirements can vary slightly depending on where you plan to work—Denver, Colorado Springs, Boulder, and others each have their own plumbing boards.

💡 Pro Tip: Always check with your local building department first. For example, the City and County of Denver requires separate registration even if you’re licensed elsewhere in the state.

Step-by-Step: How to Get a Plumbing License in Colorado

Step 1: Complete a Plumbing Apprenticeship (or Equivalent Experience)

To qualify for a Journeyman license, Colorado typically requires:

• 4 years (or 5,760 hours) of documented plumbing experience under a licensed master plumber.
• 500+ hours of classroom instruction (often included in union or trade school programs).

Many apprentices enroll through:

• UA Local 71 (Denver Plumbers Union)
• Colorado Community College System (e.g., Aims Community College, Pueblo Community College)
• Employer-sponsored programs

According to the U.S. Bureau of Labor Statistics (2024), plumbers in Colorado earn a median annual wage of $62,340, with top earners making over $90,000—especially those with master licenses.

Step 2: Gather Required Documentation

Before applying, prepare:

• Proof of work experience (signed by licensed supervisors)
• Transcripts or certificates from training programs
• Government-issued ID
• Application fee (varies by jurisdiction; typically $75–$150)

Some cities, like Fort Collins, also require background checks.

Step 3: Pass the Journeyman Plumbing Exam

The exam tests knowledge of:

• Colorado State Plumbing Code (based on the IPC – International Plumbing Code)
• Local amendments
• Safety protocols
• Math and blueprint reading

Exam Details (Denver Example):

• Format: 80 multiple-choice questions
• Time: 3.5 hours
• Passing Score: 70%
• Fee: $100 (non-refundable)

📚 Study resources:

• International Plumbing Code (IPC) 2021
• PSI Exams practice tests
• Local trade schools often offer exam prep courses

You can schedule your test through PSI Services, the official testing provider for most Colorado jurisdictions.

Step 4: Apply for Your License Locally

Submit your completed application, fees, and exam results to your city or county plumbing board. Processing usually takes 2–4 weeks.

Once approved, you’ll receive your Journeyman Plumber License, valid for 1–3 years (renewal periods vary).

🔗 For official code references, see the International Plumbing Code overview on Wikipedia .

How to Upgrade to a Master Plumber License

After working as a Journeyman for at least 2 additional years (total of 6+ years in the trade), you can pursue a Master Plumber License.

Requirements typically include:

• 8,000+ total hours of plumbing experience
• Additional 1,000+ hours in commercial or complex systems
• Passing a more advanced master-level exam (often includes design and code interpretation)

Master plumbers can:

• Pull permits independently
• Start their own plumbing businesses
• Supervise apprentices and journeymen

In Denver, the master exam has a ~65% first-time pass rate, underscoring the need for thorough preparation.

Common Mistakes to Avoid

Many applicants delay their licensing due to avoidable errors:

Benefits of Getting Licensed in Colorado

• Higher Earnings: Licensed plumbers earn 20–30% more than unlicensed helpers.
• Job Security: Plumbing is recession-resistant—homes and businesses always need repairs.
• Entrepreneurship: A master license lets you launch your own company.
• Public Trust: Licensing proves you meet safety and competency standards.

According to the Colorado Department of Labor & Employment, plumbing jobs are projected to grow 11% by 2030—faster than average.

FAQ: How to Get a Plumbing License in Colorado

Q1: Do I need a license to do plumbing work in Colorado?

A: Yes—for any work beyond minor homeowner repairs (like unclogging a drain), you must be licensed at the local level. Unlicensed plumbing can result in fines up to $1,000 per violation in cities like Denver.

Q2: Can I get a Colorado plumbing license if I’m licensed in another state?

A: Colorado has no statewide reciprocity, but some cities (e.g., Aurora) may waive parts of the exam if you hold an equivalent license from a state with comparable standards. You’ll still need to pass local code sections.

Q3: How much does it cost to get a plumbing license in Colorado?

A: Total costs range from $300 to $600, including:

• Application fees ($75–$150)
• Exam fee (~$100)
• Study materials ($100–$200)
• Training program tuition (if not employer-sponsored)

Q4: How long does the entire process take?

A: If you start from scratch, expect 4–5 years (apprenticeship + exams). If you already have experience, you could be licensed in 3–6 months after applying.

Q5: Are there continuing education requirements?

A: Most Colorado jurisdictions do not require CE credits for journeyman renewal, but Denver requires 8 hours every 2 years for master plumbers. Always verify with your local board.

Q6: Can I work as a plumber while waiting for my license?

A: Only as an apprentice under direct supervision. Performing independent plumbing without a license is illegal and risks penalties for both you and the hiring contractor.

Conclusion

Now you know exactly how to get a plumbing license in Colorado—from apprenticeship to master status. It’s a journey that demands time and effort, but the payoff is a respected, lucrative career with endless opportunities.

Whether you’re just starting out or upgrading your credentials, take that first step today: contact your local plumbing board, enroll in a training program, or schedule your exam. Your future as a Colorado plumber starts now.

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