Knowing and Meeting Plumbing Licensing and Certification Requirements in Illinois
Knowing and meeting the plumbing licensing and certification requirements in Illinois is not just a legal necessity—it’s a foundational part of operating a professional, trustworthy, and sustainable plumbing business. Whether you’re an aspiring apprentice, an experienced journeyman, or looking to launch your own plumbing contracting company, understanding the steps required to obtain and maintain your Illinois plumbing license is crucial.
In this comprehensive guide, we’ll break down the types of licenses, application and renewal processes, required exams and training, and ongoing education expectations. We’ll also explain how the Illinois Department of Public Health (IDPH) rules support both contractors and customers, and what can happen if you work without proper licensing.
Let’s dive in.
Types of Plumbing Licenses in Illinois
Illinois regulates plumbers at the state level through the Illinois Department of Public Health (IDPH), which administers licensing and enforcement. The state of Illinois offers three primary categories of plumbing licenses:
1. Apprentice Plumbing License
If you’re just starting out in the trade, this is your first step. An apprentice plumber works under the supervision of a licensed plumber to learn the practical and technical aspects of plumbing. You must be registered with the IDPH before beginning work as an apprentice.
2. Licensed Plumber (Journeyman)
Sometimes called a journeyman or tradesman license, this credential is provided to plumbers who’ve completed their apprenticeship and passed the required state licensing exam. Licensed plumbers can work independently on residential or commercial projects, but they are not permitted to hire or subcontract other plumbers.
3. Plumbing Contractor License
For those looking to start their own business or hire other licensed plumbers, a plumbing contractor license is required. You must have an Illinois plumber’s license and provide proof of insurance and bonding to qualify. These contractors also need to register their business with the state.
How to Get a Plumber’s License in Illinois: Requirements and Application Process
Whether you’re starting as an apprentice or moving up to become a contractor, here are the key steps and qualifications you’ll need to meet.
General Requirements for All License Levels:
- Must be at least 16 years old to register as an apprentice
- High school diploma or GED (recommended but not required by the state)
- Legal right to work in the United States
- No record of pending criminal or ethical violations with the IDPH
- Application fee payment (varies by license type)
Apprentice License Requirements:
- Must be employed under a licensed plumber or plumbing contractor
- Submit an Apprentice Plumbing License Application to the IDPH: Apprentice Plumbing License Application
- Pay a non-refundable registration fee
- License must be renewed annually
Journeyman (Licensed Plumber) Requirements:
- Complete at least 4 years of apprenticeship under a licensed plumber
- Pass the Illinois plumber licensing exam administered by IDPH
- Apply by submitting the Illinois Plumber License Application form: Illinois Plumber License Application
- Pay license fee ($150 as of 2024)
- Renew license every 2 years
Plumbing Contractor License Requirements:
- Must hold a valid Illinois plumber license
- Proof of general liability insurance (usually $500,000 policy minimum)
- Surety bond ($20,000 required minimum)
- Business registration with the Illinois Secretary of State
- Application involves submitting proof documents and license details
Required Exams and Training
No matter your role in the plumbing trade, testing and formal preparation is expected as you advance.
Apprentice Training:
- Typically involves classroom learning via a union or trade school in addition to fieldwork
- Includes blueprint reading, local code familiarity, math, OSHA safety training, and tool use
Journeyman Exam:
- Hands-on and written components
- Covers Illinois plumbing codes, backflow prevention, water distribution, drainage, venting, material identification, and sanitation
- Administered by the State through authorized testing agencies or technical colleges
- Re-application necessary if a passing score is not achieved
Contractor Licensing:
- No new exam, but proof of passing the journeyman exam and insurance is required
- Good standing with IDPH and the Secretary of State’s Office is mandatory
Continuing Education for Plumbers in IL
Plumbing is a dynamic industry that changes with new codes, materials, and technologies. That’s why the IDPH requires continuing education (CE) for all licensed plumbers.
CE Requirements Include:
- 4 hours of IDPH-approved training every year
- Topics may include sustainability, updated codes, safety, green building practices, and technology
- Can be completed in-person or online through an IDPH-approved provider
You can find a list of approved CE providers here: Approved CE Providers
Proof of continuing education must be submitted alongside your license renewal application to avoid delays or rejection.
Penalties for Operating Without a License in Illinois
Don’t take the risk. Working as a plumber in Illinois without the proper license is illegal and can lead to serious consequences. The IDPH actively investigates and penalizes unlicensed plumbing activities and contractors.
Penalties May Include:
- Cease and desist orders
- Fines of up to $5,000 per offense
- Criminal charges for repeated or willful violations
- Loss of eligibility to obtain a license in the future
- Civil lawsuits from unhappy clients or municipalities
If you’re a homeowner hiring a contractor, always verify they are licensed through the IDPH Plumbing License Lookup Tool: IDPH Plumbing License Lookup Tool
Why Licensing Protects Both Contractor and Customer
Plumbing involves critical health-related systems, including drinking water, waste disposal, and gas lines. That’s why licensing is not just about red tape—it’s about safety and quality.
For Contractors:
- A valid license boosts trust and professional image
- Opens doors to bigger commercial contracts
- Helps ensure you are covered by insurance in case of liability
- Allows you to market legally and competitively
For Homeowners:
- Guarantees work is done to state standards
- Minimizes the risk of unsafe or sub-code installations
- Offers recourse if work goes wrong
Call to Action: Stay Compliant, Stay Professional
If you’re unsure about your licensing status or want to take the next step professionally, don’t wait until renewal season or a job loss. Reach out today to an experienced mentor, union hall, or professional association such as:
- Illinois Association of Plumbing-Heating-Cooling Contractors (IL PHCC) – Website: IL PHCC
- UA Local 130 (for Chicago-area apprenticeships) – Apprenticeship Site: UA Local 130
- Illinois Department of Public Health (IDPH) Plumbing Division – Resources and forms: IDPH Plumbing Division
Summing It Up: Your Path to Licensing in Illinois
Holding an Illinois plumbing license is more than a requirement—it’s a tool that lets you build a successful, compliant, and respected plumbing career or business. By understanding the types of licenses, required education and exams, and by staying on top of renewals and CE requirements, you ensure legal compliance while raising your professional appeal to clients and peers alike.
Remember These Key Points:
- Register as an apprentice before performing any plumbing work
- Complete an apprenticeship and pass the IDPH exam to become licensed
- Carry insurance and bonding to operate as a contractor
- Renew licenses and meet continuing education (4 hours/year)
- Avoid steep penalties by never working without a license
You’ve invested time and skill into mastering plumbing—make sure your license reflects it.
👉 Ready to take your plumbing career to the next level? Start your application or renewal at the IDPH site: IDPH Plumbing Site
Need guidance? Call us today at (555) 123-4567.
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