If you’re a plumbing apprentice, journeyman, or contractor working in Illinois: An Overview of Licensing and Certification
If you’re a plumbing apprentice, journeyman, or contractor working in the state of Illinois — or looking to become one — understanding the licensing and certification requirements is crucial. The Illinois Department of Public Health (IDPH) regulates the plumbing industry, and staying compliant not only protects your livelihood but also ensures the safety and health of homeowners across the state.
In this guide, we’ll break down the types of Illinois plumbing licenses, how to apply and renew, what’s required for training and exams, and why licensing helps both contractors and the communities they serve.
Understanding the Types of Plumbing Licenses in Illinois
In Illinois, plumbing professionals must carry a valid license issued by the Illinois Department of Public Health (IDPH). There are three main types of state-recognized plumbing licenses:
1. Apprentice Plumbing License
For those just getting started in the plumbing industry, the apprentice plumber license is the entry point.
Key Requirements:
- You must work under the supervision of a licensed plumber.
- Enroll in a registered plumber apprenticeship program.
- Obtain your apprentice license through IDPH before starting work.
Note: An apprentice license is not a full license — it’s a prerequisite to becoming a licensed plumber through formal training and on-the-job experience. After four to five years of apprenticeship, candidates become eligible to take the journeyman plumber exam.
2. Licensed Plumber (Journeyman Equivalent)
In Illinois, there is technically no separate journeyman plumber license classification. Instead, applicants who complete their apprenticeship and pass the state licensing exam become Licensed Plumbers.
Key Benefits:
- Authorized to perform plumbing work independently or under a plumbing contractor.
- Can supervise apprentices and install, repair, and maintain plumbing systems.
Eligibility Criteria:
- Completion of an approved apprenticeship program.
- Minimum age of 18.
- Successful passage of the IDPH Plumbing License Exam.
3. Plumbing Contractor License
To own or operate a plumbing business in Illinois, you must obtain a Plumbing Contractor License. This official registration with the state allows you to hire licensed plumbers and apprentices, take on commercial and residential contracts, and advertise services legally.
Requirements Include:
- Holding a current Illinois Plumbing License.
- Providing proof of a $20,000 surety bond.
- Furnishing proof of general liability insurance.
- Registering your business name with the Illinois Secretary of State (if operating under a company name).
- Paying the contractor registration fee to IDPH.
For more licensing information and applications, visit the IDPH Plumber Licensing Page: IDPH Plumber Licensing Page
Applying for and Renewing Your Illinois Plumbing License
Having a valid Illinois plumbing license is not a one-and-done task — maintenance and renewal are required to remain compliant with state regulations.
How to Apply for a Plumber Apprenticeship License
Follow these steps to begin your journey:
- Download and complete the application from the IDPH Plumbing Licensing page.
- Submit required documentation, including:
- Proof of enrollment in a registered program
- Proof of supervision by a licensed plumber
- Application fee (currently $100)
Applying for the State Plumbing Exam
To become a licensed plumber in Illinois:
- Complete a state-approved apprenticeship program (typically 4–5 years).
- Submit the Application for Examination to IDPH.
- Pay the examination fee.
- Receive authorization to test.
- Pass the state-administered written and practical plumbing exams.
How to Register as a Plumbing Contractor in Illinois
If you’re looking to become a fully licensed plumbing contractor, you’ll first need to:
- Hold a valid and current plumber’s license.
- Secure the required $20,000 surety bond.
- Provide proof of a minimum of $500,000 general liability insurance.
- Pay the current contractor registration fee (approx. $150–$250 annually).
License Renewals
- Plumber’s licenses in Illinois expire annually on May 1st.
- Renewals may be submitted online or by mail.
- Continuing education proof is required.
- Failure to renew on time may result in late fees and suspension.
Continuing Education Requirements for Plumbers in IL
Licensed plumbers in Illinois are required to complete four (4) hours of continuing education each year to maintain licensure. Topics typically cover updates to the Illinois Plumbing Code, building safety, sustainable practices, and new technologies.
Training must be completed through an IDPH-approved provider. Failure to comply can result in license suspension or revocation. You can find approved CE classes via the IDPH Continuing Education page.
Penalties for Operating Without a Plumbing License in Illinois
Plumbing without a license in Illinois is strictly prohibited and considered a violation of state law. IDPH and local authorities enforce compliance through inspections and administrative action.
Possible Penalties Include:
- Cease and desist orders
- Fines and monetary penalties
- Civil and criminal charges (for repeated or serious offenses)
- Permanent disqualification from licensure
- Loss of trust and negative impact on your professional reputation
Unlicensed work can also void insurance claims, create liability risks, and leave property owners without legal recourse if something goes wrong. For long-term success and legal compliance, always ensure your license is up to date and valid.
Bulleted List: Illinois Plumbing License Requirements
Whether you’re just beginning or expanding your business, here’s a quick summary of what you’ll need:
- Be at least 18 years old
- High school diploma or GED
- Enroll in a registered apprenticeship program
- Obtain an Apprentice License from IDPH
- Complete 4–5 years of on-the-job training
- Pass the written and practical Illinois Plumber Licensing Exam
- Provide proof of liability insurance and surety bond (for contractors)
- Complete four hours of approved continuing education each year
- Renew license annually on or before May 1st via IDPH
- Never operate plumbing services without a valid license
Why Licensing Matters: Protection for Contractors and Homeowners
State regulations may feel like a burden at times, but every licensing requirement is designed to ensure high standards across the trade. Licensing isn’t just about compliance — it’s about protection and professionalism on every level.
For Plumbing Contractors:
- Validates your work quality and safety training.
- Offers legal protection in case of disputes or inspections.
- Enhances your company’s credibility with clients, inspectors, and insurers.
For Homeowners:
- Ensures work is performed by qualified professionals.
- Guarantees compliance with building and safety codes.
- Provides assurance that their investment is protected from substandard or illegal work.
Unlicensed or uncertified work can lead to water contamination, structural damage, and even legal liabilities. That’s why the IDPH holds such strict requirements — to keep Illinois families safe and the water infrastructure properly maintained.
Final Call: Stay Compliant and Stay Certified
Navigating plumbing certifications and renewals in Illinois can seem overwhelming if you’re doing it alone. But help is available. Whether you’re an apprentice just starting out, or a seasoned contractor working to maintain your license, remember:
→ Know your license type
→ Stay current on continuing education
→ Renew on time
→ Follow IDPH plumber rules to the letter
If you ever have questions about your standing or need help navigating the process, reach out to a qualified industry mentor, local plumber’s union, or professional trade association like:
- The Illinois Plumbing Inspectors Association (IPIA)
- Illinois Association of Plumbing-Heating-Cooling Contractors (IL PHCC)
- United Association of Plumbers and Pipefitters Local Unions across the state
Helpful Links and Resources
- IDPH Plumbing Program Main Page
- IDPH Plumber’s License Applications and Renewals
- Continuing Education Resources for IL Plumbers
- Illinois Administrative Code for Plumbers (225 ILCS 320)
Conclusion
Whether you’re determining how to get a plumber’s license in Illinois, preparing for your test, or renewing your contractor certification, following IDPH plumber rules is non-negotiable. Compliance brings credibility, legal protection, and peace of mind for you and your clients.
Stay licensed. Stay trusted. Grow your reputation the right way.
Need support or have licensing questions? Contact us today at 555-PLUMB-IL or follow us on Facebook and Instagram:
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We’re here to help Illinois plumbers and plumbing contractors succeed.