If you’re a plumbing apprentice, journeyman, or contractor working in Illinois, understanding the state’s plumbing license requirements is not just a good idea—it’s essential.
Plumbing is one of the most regulated trades in the country, and Illinois is no exception. The Illinois Department of Public Health (IDPH) oversees plumbing licensure to ensure that all professionals working in the field meet high standards of skill, safety, and integrity.
Why Plumbing Licensure Matters
Before diving into the technicalities, let’s make one thing clear: Licensing protects everyone.
- For homeowners, a licensed plumber ensures that plumbing work is done safely and up to code, helping to avoid costly repairs and dangerous conditions.
- For plumbing contractors, holding a valid plumbing license in Illinois means you’re recognized as a legitimate professional. It protects your reputation, reduces legal risks, and can even boost your business.
Operating without a valid license in Illinois is not only illegal but also loaded with steep penalties that could include fines, legal trouble, and damage to your career.
Types of Plumbing Licenses in Illinois
In Illinois, plumbing professionals typically fall into one of the following license categories:
1. Plumbing Apprentice License
If you’re new to the trade, this is your starting point. An apprentice works under the supervision of a licensed plumber to gain hands-on experience.
Requirements:
- Must be at least 16 years old
- Must be employed by a licensed plumber or contractor
- Must register with the Illinois Department of Public Health (IDPH)
- Renewal required annually
Application Process:
You or your employer must submit a plumbing apprentice application to the IDPH’s Plumbing Program:
👉 IDPH Plumbing Program
2. Licensed Plumber or Journeyman License
Once your training is complete, you can take the exam to become a licensed plumber (commonly referred to as a journeyman elsewhere). Illinois only issues the “Plumbing License” after successful completion of the exam and apprenticeship.
Requirements:
- Must complete a minimum 4-year apprenticeship
- Must pass the Illinois Plumber Licensing Exam
- Must provide proof of experience and employment under a licensed contractor
Exam Overview:
The Illinois Plumbing License Exam tests on:
- Illinois Plumbing Code knowledge
- Practical plumbing skills
- Pipefitting, gas lines, drainage systems, and health/safety procedures
You must register for the exam through the IDPH portal and pay the corresponding fee.
3. Plumbing Contractor License
If you’re operating or planning to operate a plumbing business, this license is required.
Requirements:
- Must first hold a valid plumber’s license
- Submit proof of business registration in Illinois (if running your own business)
- Obtain a Certificate of Insurance
- Provide a bond (currently $20,000 minimum)
- Pay licensing fees
- Renewal required annually
The contractor’s license allows you to hire other plumbers and bid on projects.
How to Get a Plumber’s License in Illinois: Step-by-Step
So, how do you become a licensed plumber in Illinois? Here’s a simplified path:
1. Begin as an Apprentice:
- Register through the IDPH
- Find employment with a licensed contractor
- Add on-the-job training hours and classroom instruction
2. Complete Your Apprenticeship:
- A minimum of four years under a certified plumbing program or licensed mentor
3. Apply for the Licensing Exam:
- Submit experience verification
- Pay exam fees and submit ID
- Take and pass the exam through IDPH
4. Receive Licensure:
- Upon passing, obtain and display your license number
5. Contractor? Apply for Contractor License:
- Submit proofs like insurance, bond, and business details
👉 Full information and up-to-date forms available at the IDPH Official Plumbing Licensing Page
Continuing Education Requirements for Plumbers in Illinois
Keeping your license active isn’t a one-and-done deal. The State of Illinois mandates continuing education to ensure plumbers stay up-to-date with code changes, environmental regulations, and new technologies.
For Licensed Plumbers:
- Must complete 4 hours of approved continuing education annually
- Courses must be IDPH-approved
- Topics include plumbing code, safety updates, energy efficiency, and more
For Contractors:
If you’re a plumbing contractor, your educational requirements may be higher, especially if you’re supervising other plumbers or training apprentices.
👉 Approved education providers can also be found through local union chapters or directly via IDPH.
Tip: Don’t let the renewal date sneak up on you. Keep track of your CE hours ahead of time to avoid lapses in your license status.
Application and Renewal Process
You can apply or renew your license through mail or online, depending on the license type.
Renewal Deadlines:
- Apprenticeships: Annually by May 1
- Plumbers’ licenses: Annually by May 1
- Contractors: Annually by May 1
Required for Renewal:
- Renewal fee (varies by license type)
- Proof of continuing education
- Updated insurance and business documentation (for contractors)
👉 Be sure to use the official IDPH license renewal portal or appropriate mailing address listed on IDPH’s plumbing license page.
Penalties for Operating Without a License
Working as a plumber or operating a plumbing business without the proper license in Illinois is a serious offense. IDPH actively checks for license violations and can impose strict penalties:
- Fines up to $10,000
- Cease and Desist Orders
- Revocation of Registration or License
- Permanent bans for repeat offenders
- Legal action for code violations or negligence
For homeowners, hiring an unlicensed plumber could also void homeowner’s insurance in case of damage or improperly installed systems.
Needless to say, don’t take shortcuts. Compliance not only ensures legality but also peace of mind in your career.
Benefits of Staying Licensed and Certified
Beyond legal compliance, staying properly licensed as a plumber in Illinois provides numerous benefits:
- Professional Credibility: You’ll be listed publicly in the IDPH license verification system, increasing customer trust.
- Higher Earning Potential: Licensed plumbers and contractors earn significantly more than unlicensed handymen.
- Business Growth: With a valid contractor license, you can scale your services, hire staff, and take on commercial or municipal jobs.
- Better Referrals: Homeowners, developers, and even government entities often require verification before hiring.
Licensing is more than a formality— it’s a business tool.
Summary Checklist: Licensure Requirements in IL
Here’s a quick reference for what you’ll need depending on your license level:
Apprentice Plumber:
- [ ] Must be age 16+
- [ ] Work under a licensed plumber
- [ ] Register with IDPH
- [ ] Renew annually
Licensed Plumber:
- [ ] Complete 4+ year apprenticeship
- [ ] Pass IDPH Plumbing Exam
- [ ] Submit work history and references
- [ ] Complete 4 CE hours annually
- [ ] Renew license by May 1 annually
Plumbing Contractor:
- [ ] Hold valid plumber’s license
- [ ] Form a registered business in Illinois
- [ ] Provide insurance and bond
- [ ] Apply for contractor license with IDPH
- [ ] Schedule annual renewals with all documents
Stay Compliant & Never Go It Alone
Understanding and managing your licensure status is fundamental as a plumbing professional. If you’re ever in doubt about your standing or the steps required, reach out for guidance from:
- A senior licensed mentor
- Trade associations like the Illinois Association of Plumbing-Heating-Cooling Contractors (ILPHCC)
- Your local union
- IDPH directly via their contact page
📣 Call to Action: Don’t risk penalties, business credibility, or your investment of time and training. Stay compliant, renew on schedule, and don’t be afraid to ask for help!
Final Thoughts: Build Your Career — Safely and Legally
Whether you’re at the start of your plumbing career or building your own company, your license is your most important asset. Don’t let a paperwork mistake or missed renewal cost you customers—or your entire livelihood.
✅ Bookmark the IDPH Plumbing Website
✅ Track your CE hours early
✅ Set calendar reminders for license renewals
✅ Consult with mentors to stay on top of code changes
Stay licensed. Stay trusted. Grow your reputation the right way.
Need help? Contact us at (555) 123-4567
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Let’s raise the bar for plumbing professionals in Illinois—together.