Plumber Licensing in Illinois

Illinois Plumber License Verification

In Illinois, individuals performing plumbing work are required to hold a valid license to protect public health and ensure adherence to established standards. The primary governing body for plumber licensing across the state is the Illinois Department of Public Health (IDPH). The IDPH is responsible for licensing plumbers, plumbing contractors, and apprentice plumbers under the Illinois Plumbing License Law (225 ILCS 320).

To obtain an initial plumber's license, applicants must typically complete a rigorous apprenticeship program. This involves working as a licensed apprentice plumber for a minimum of four years (48 to 72 months), accumulating at least 1,400 hours annually, totaling 5,600 hours of practical experience under a licensed plumber or an approved apprenticeship program. Additionally, applicants must have completed at least two years of high school or its equivalent, coupled with an approved course of instruction from a college, university, or trade school. Candidates must be at least 18 years of age to apply for a plumber's license. After fulfilling these prerequisites, individuals must pass a state licensing examination. Plumber licenses are subject to annual renewal by April 30th and require the completion of four hours of IDPH-approved continuing education.

While the IDPH oversees statewide licensing, the City of Chicago maintains its own distinct licensing requirements for apprentice plumbers, journeyman plumbers, and plumbing contractors, issued through the Board of Plumbing Examiners within the Department of Buildings. State-issued licenses are recognized within Chicago, provided the plumber's employer holds a City of Chicago plumbing contractor license. As of 2026, new plumbing contractor licenses in Chicago necessitate that at least one owner or officer be a Chicago-licensed plumber.

Insurance and Bonding Mandates

Plumbing contractors in Illinois must adhere to specific insurance and bonding requirements to operate legally and safeguard consumers. All plumbing contractors are mandated to register with the state and pay an annual registration fee. A crucial requirement is the procurement of a $20,000 surety bond, which ensures compliance with state plumbing codes and provides financial protection to clients against incomplete work, contract violations, or substandard workmanship. This bond expires annually on September 30th.

Furthermore, plumbing contractors must maintain minimum general liability insurance coverage. The mandated minimums are $100,000 per occurrence, $300,000 for bodily injury, and $50,000 for property damage. Businesses employing staff are also required to carry Workers' Compensation insurance, with a minimum coverage of $500,000. Contractors operating without employees must submit an "Affidavit of No Employees" to the IDPH. Commercial auto insurance is also strongly recommended for businesses utilizing vehicles for work-related activities.

Permitting and Local Regulations

The Illinois Department of Public Health establishes and enforces the Illinois Plumbing Code (77 Ill. Adm. Code 890), which sets the minimum standards for plumbing practices throughout the state. All plumbing installations, alterations, repairs, and maintenance must comply with this code. It is important to note that while the IDPH governs statewide plumbing standards, local governmental units, including home rule units, may adopt their own plumbing ordinances and amendments to the Illinois Plumbing Code. However, the IDPH does not enforce these local amendments; therefore, any questions regarding compliance with local ordinances should be directed to the specific local authority. Projects typically require permits from the relevant local building or health department before work commences, and inspections are conducted to ensure compliance with both state and local codes. It is imperative for plumbers and plumbing contractors to verify and adhere to all applicable local regulations in addition to state mandates for each project.

Official Illinois Resources

For the most accurate and up-to-date information regarding plumbing licensing and regulations in Illinois, please refer to the following official resources:

Illinois Department of Public Health - Plumbing Program

Illinois Department of Public Health - Plumbing Contractor Application for Registration or Renewal

Illinois Department of Public Health - Plumbing Contractor Surety Bond Form

City of Chicago - Plumber License

City of Chicago - Plumbing Contractor License

Directory of Plumber contractors serving Illinois