If you’re a plumber or plumbing contractor working in Illinois—or planning to become one—it’s essential to understand the licensing and certification requirements set by the state. Operating without the proper credentials isn’t just risky; it’s illegal and can carry substantial penalties. This comprehensive guide explains everything you need to know about obtaining and maintaining your Illinois plumbing license.

Whether you’re an apprentice just starting out, a journeyman ready to level up, or a contractor running your own business, staying compliant with Illinois Department of Public Health (IDPH) guidelines is crucial for long-term professional success.

Understanding the Types of Plumbing Licenses in Illinois

In Illinois, plumbers must be licensed through the Illinois Department of Public Health (IDPH). The state recognizes three primary types of plumbing licenses:

1. Apprentice Plumber License

An Apprentice Plumber License is the entry-level license for individuals who are learning the trade under the supervision of a licensed plumber.

Key Points:

• Must work under the supervision of a licensed plumbing contractor.
• License is valid for a limited number of years (usually six years in total).
• Apprentices must be enrolled in a state-approved training or apprenticeship program.
• Cannot install plumbing systems independently.

2. Licensed Plumber (Journeyman-Level)

Once an individual has completed their apprenticeship and passed the state’s licensing exam, they can become a licensed plumber.

Key Points:

• Must pass the state plumbing exam.
• Permitted to work independently under a plumbing contractor or their own licensed business.
• Eligible to supervise apprentices.
• Can perform installation and repair services on all plumbing systems.

3. Plumbing Contractor License

The Plumbing Contractor License allows individuals or businesses to operate independently and offer services to the public.

Key Points:

• Must already be a licensed plumber.
• Required to show proof of liability insurance and a surety bond.
• Includes additional business and legal responsibilities.
• Must register annually with the IDPH.

For more information about types of licenses and requirements, visit the IDPH Plumbing Program page.

Application and Renewal Process for Plumbing Licenses

Understanding how to apply for and renew your Illinois plumbing license is vital for continuous legal operation.

How to Get a Plumber’s License in Illinois

Apprentice License Application:

• Must submit a completed application form to IDPH.
• Proof of employment under a licensed plumbing contractor.
• Enrollment verification in an approved training or union program.

Exam for Plumber License:

• Held multiple times throughout the year (typically in Springfield).
• Application must include:
• Proof of apprenticeship completion.
• Employment verification.
• Education records.

Plumbing Contractor License:

• Must submit:
• Proof of existing plumbing license.
• Certificate of insurance.
• Surety bond.
• Business information.

License Renewal

• All plumber licenses in Illinois expire on April 30 of each year.
• Renewal involves:
• A fee (varies by license type).
• Proof of continued education completion.
• Updated professional and business information for contractors.

Failing to renew a license on time may incur fines or require reapplication, depending on the duration of the lapse.

Required Exams and Training

Obtaining a plumbing license in Illinois requires passing a rigorous exam that tests your knowledge of plumbing systems, local codes, and safety regulations.

Exam Overview

The state plumbing exam covers:

• Illinois Plumbing Code
• Blueprint and site plan reading
• Water supply and drainage systems
• Vents and backflow prevention
• Health and safety requirements

Exam Requirements:

• Fee payment (typically $175 to $225)
• Valid photo ID
• Completed application with apprenticeship details
• Taken in person at a designated IDPH location

You must complete an approved apprenticeship (typically four to five years of training) including classroom instruction and on-the-job training before becoming eligible.

Continuing Education Requirements for Illinois Plumbers

Keeping your skills current isn’t just about being efficient—it’s a legal requirement. The state mandates a certain number of continuing education hours every year.

Current CE Requirements

• All licensed plumbers (excluding apprentices) must complete at least 4 hours of continuing education annually.
• Courses must be approved by the IDPH.
• Topics include health and safety regulations, updates to the Illinois Plumbing Code, and new technologies in plumbing.

For approved providers and to update your CE records, contractors can visit the Continuing Education for Licensed Plumbers page on the IDPH site.

Penalties for Operating Without a License

Performing plumbing work in Illinois without the proper license isn’t just unprofessional—it’s a legal violation. Here’s what you’re risking:

Legal and Financial Repercussions

• Fines of up to $5,000 or more per violation.
• Legal action by the IDPH or local municipalities.
• Revocation of any pending applications.
• Loss of business reputation or inability to bid on commercial jobs.
• Permanent ban from licensure in extreme cases.

Even small infractions—such as failing to renew your license—can lead to big problems. Don’t take the risk—stay licensed.

Why Licensing Matters: Protecting Contractors and Homeowners Alike

Having a valid plumbing license isn’t just about compliance—it’s about trust, safety, and professionalism.

Benefits of Licensing

For Contractors:

• Enhances your credibility in a competitive market.
• Allows you to legally pull permits and complete larger-scale jobs.
• Makes you eligible for commercial and government projects.
• Opens doors to winning more bids through compliance.

For Homeowners:

• Offers protection through insurance and bonding.
• Ensures work is being performed to code, protecting property value.
• Provides legal recourse if something goes wrong.
• Increases customer trust and confidence.

Licensing builds your reputation in the industry—don’t underestimate the power of being “official” in the public’s eye.

Checklist: How to Get a Plumber’s License in Illinois

Here’s a quick reference for all plumbers pursuing a license in Illinois:

• ✅ Be at least 18 years old.
• ✅ Have a high school diploma or GED.
• ✅ Enroll in a state-approved apprenticeship program.
• ✅ Apply for an apprentice license through IDPH.
• ✅ Complete 4–5 years of on-the-job apprentice training.
• ✅ Submit licensing exam application.
• ✅ Pass the Illinois plumbing licensing exam.
• ✅ Obtain a Plumbing Contractor License if you plan to operate independently.
• ✅ Complete at least 4 hours of IDPH-approved continuing education annually.
• ✅ Renew all licenses prior to April 30 each year.
• ✅ Avoid working without a valid license—penalties are steep.

Stay Compliant—Your Career Depends On It

Whether you’re just starting your plumbing career or you’re a seasoned pro, understanding Illinois’ licensing rules is crucial. With opportunities for growth and demand for skilled plumbers on the rise, staying licensed and current isn’t just a legal obligation—it’s a competitive advantage.

If you ever feel uncertain about your licensure status, CE hours, or how to handle renewing your certification—reach out. Contact a trusted mentor, join a plumbing association, or explore IDPH’s online resources.

Useful Resources:

• IDPH Plumbing Licensure Information
• Illinois Plumbing Code Online
• Illinois Continuing Education FAQs

Call to Action: Are You Compliant?

Staying up to date with Illinois plumbing license rules is the best move you can make for your business and your clients.

📌 Don’t wait for a fine or failed inspection to find out you’re out of compliance.

📞 If you need guidance, mentorship, or want to double-check your application, call us today at (555) 123-4567.

🔧 Follow us on social media for updates, reminders, and helpful content:

• Facebook: @IllinoisPlumberPros
• Twitter: @ILPlumbingGuild
• LinkedIn: Illinois Plumbing Association

Stay licensed. Stay trusted. Grow your reputation the right way.