How to Get a Plumbing License in Illinois (2024 Guide)

Dreaming of a stable, in-demand career with strong earning potential? Plumbing might be your perfect fit—and in Illinois, you’ll need a state-issued license to work legally. Whether you’re just starting out or upgrading from an apprentice, knowing how to get a plumbing license in Illinois is your first critical step. This guide breaks down everything clearly, accurately, and without the confusing jargon.

What Types of Plumbing Licenses Exist in Illinois?

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

1. Apprentice Plumber License
   • For beginners enrolled in an approved training program.
   • Must work under direct supervision of a licensed plumber.
2. Journeyman Plumber License
   • Allows independent work on residential and commercial plumbing (excluding design or supervision).
   • Requires 4+ years of experience and passing a state exam.
3. Master Plumber License
   • Highest level; permits system design, business ownership, and supervising apprentices/journeymen.
   • Requires 2+ years as a journeyman and a separate exam.

💡 Pro Tip: You must hold an apprentice license before progressing—there’s no shortcut.

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

Step 1: Meet Basic Eligibility Requirements

Before applying, ensure you:

• Are at least 16 years old (for apprentice); 18+ for journeyman/master.
• Have a high school diploma or GED.
• Are legally authorized to work in the U.S.

Step 2: Register as an Apprentice

• Apply through the Illinois Department of Public Health (IDPH)—the state agency overseeing plumbing licensing.
• Submit proof of enrollment in an IDPH-approved apprenticeship program (e.g., through a union like UA Local 130 or a vocational school).
• Pay the $50 apprentice registration fee (as of 2024).
• Renew annually ($50/year) until you qualify for the journeyman exam.

📌 Note: Illinois mandates 4 years (8,000 hours) of hands-on training under a licensed plumber to sit for the journeyman exam.

Step 3: Complete Required Education

While working as an apprentice, you must also complete at least 400 hours of classroom instruction in:

• Plumbing codes (IPC & UPC)
• Blueprint reading
• Safety protocols
• Math for pipefitting

Many programs integrate this into their curriculum—confirm yours is IDPH-approved.

Step 4: Apply for the Journeyman Plumber Exam

Once you’ve logged 8,000 hours:

1. Submit Form PLB-APP-J to IDPH.
2. Include:
   • Proof of hours (signed by your supervising plumber)
   • Transcripts from classroom training
   • $100 exam fee
3. Wait for approval (typically 2–4 weeks).

Step 5: Pass the Illinois Journeyman Plumbing Exam

• The exam has 100 multiple-choice questions.
• Covers:
  • Illinois Plumbing Code (based on the International Plumbing Code)
  • Drainage, venting, water supply, fixtures, and gas piping
• Passing score: 70%
• You get 3 attempts within 12 months.

📚 Study Resource: The Illinois Administrative Code Title 77, Part 890 is your bible. Pair it with practice tests from PSI (the exam vendor).

Step 6: Receive Your License & Maintain It

• Once you pass, IDPH mails your Journeyman Plumber License within 10 business days.
• Renew every 3 years ($120 fee).
• Complete 6 hours of continuing education per renewal cycle.

How to Upgrade to a Master Plumber License

After holding a journeyman license for at least 2 years:

• Accumulate 2,000 additional supervised hours in complex installations (e.g., multi-story buildings, commercial systems).
• Pass the Master Plumber Exam (120 questions, 75% to pass).
• Pay a $150 application fee.

Master plumbers can pull permits, design systems, and run their own businesses—making this a smart long-term move.

Common Mistakes to Avoid

Illinois Plumbing License Fees & Timeline (2024)

💡 Stat Insight: According to the U.S. Bureau of Labor Statistics, plumbers in Illinois earn a median salary of $63,520/year—with masters often exceeding $85,000.

For deeper context on plumbing regulations, see the International Plumbing Code overview on Wikipedia .

FAQ: How to Get a Plumbing License in Illinois

Q: Can I get a plumbing license in Illinois with out-of-state experience?

A: Yes—but you must still meet Illinois’ 8,000-hour requirement. IDPH may accept equivalent hours if documented properly. You’ll still need to pass the Illinois-specific exam.

Q: How long does it take to get a plumbing license in Illinois?

A: Typically 4 to 5 years from apprentice to journeyman. Master licensure adds another 2+ years.

Q: Do I need a license for minor plumbing repairs?

A: Yes. Illinois law requires a license for any plumbing work beyond basic homeowner DIY (e.g., replacing a faucet washer). Unlicensed work risks fines and voided insurance.

Q: Is the Illinois plumbing exam open-book?

A: No. It’s a closed-book, proctored test. You’ll receive reference materials during the exam (like code excerpts), but no personal notes.

Q: Can felons get a plumbing license in Illinois?

A: Possibly. IDPH reviews criminal history case-by-case. Minor offenses may not disqualify you, but honesty on your application is critical.

Q: Where can I find approved apprenticeship programs?

A: Check IDPH’s official list or contact:

• UA Local 130 (Chicago)
• Illinois Valley Plumbing School (Peru, IL)
• City Colleges of Chicago (Richard J. Daley College)

Conclusion

Earning your plumbing license in Illinois isn’t just a legal requirement—it’s your ticket to job security, higher pay, and professional respect. By following this roadmap, you’ll avoid costly delays and position yourself for long-term success in a field that’s always in demand.

✅ Ready to start? Bookmark this guide, share it with a friend considering the trade, or tag someone on social media who’s “handy with a wrench”!

Got questions we didn’t cover? Drop them in the comments below—we’ll help you navigate Illinois’ plumbing licensing process with confidence.