The essentials
- Licensing authorityIllinois Department of Public Health (IDPH) — Division of Environmental Health, Plumbing Program — official site
- Statewide?Yes — Illinois licenses at the state level
- Experience requiredAt least 4 years employed as a licensed Illinois apprentice plumber. The apprenticeship period is capped at 6 years — an apprentice who does not sit for (or does not pass) the plumber exam within that window loses eligibility to renew the apprentice license. Applicants must also have completed at least 2 years of high school or the equivalent plus an approved course of instruction through a college, university or trade school.
- ExamState-administered by IDPH. Examination applications must be submitted at least 30 days before the exam date with the required fee; IDPH sets the test dates and sites rather than using an open-scheduling national vendor.
- Renewal & CEAnnual — every plumber license expires April 30 (initial licenses issued after February 15 run to the following April 30). Four hours of IDPH-approved continuing education are required each year as a condition of renewal.
- Bond / insuranceThe individual plumber license carries no bond. Plumbing Contractor registration with IDPH requires a $20,000 surety bond under the Illinois Plumbing License Law (225 ILCS 320) plus a certificate of general liability, property damage and workers' compensation insurance; registration cannot be issued or stay valid without the certificate in force. Verify current minimum limits with IDPH.
- ReciprocityNone we could confirm
License classes in Illinois
Illinois issues the following classes. Getting the class right matters — several states have residential-only or limited-scope licenses that will not cover commercial or multifamily work:
- Apprentice Plumber — must be at least 16 and sponsored by an Illinois licensed plumber or an approved apprenticeship program
- Licensed Plumber — Illinois' single individual plumbing license; there is no separate journeyman or master tier
- Plumbing Contractor — business registration with IDPH, required to contract plumbing work
- Irrigation Contractor and Retired Plumber — additional statuses regulated by the same program
Experience and training
At least 4 years employed as a licensed Illinois apprentice plumber. The apprenticeship period is capped at 6 years — an apprentice who does not sit for (or does not pass) the plumber exam within that window loses eligibility to renew the apprentice license. Applicants must also have completed at least 2 years of high school or the equivalent plus an approved course of instruction through a college, university or trade school.
One thing worth knowing regardless of state: the hours only count if they were logged properly at the time. Several boards require you to register as an apprentice before the clock starts, and hours worked while unregistered are simply gone. If you are early in the trade, get the registration paperwork right now rather than reconstructing it four years later.
The exam
State-administered by IDPH. Examination applications must be submitted at least 30 days before the exam date with the required fee; IDPH sets the test dates and sites rather than using an open-scheduling national vendor.
Renewal and continuing education
Annual — every plumber license expires April 30 (initial licenses issued after February 15 run to the following April 30). Four hours of IDPH-approved continuing education are required each year as a condition of renewal.
Letting a license lapse is more expensive than it looks. Some states allow a short grace period with a penalty fee; others treat a lapsed license as forfeited and make you retest from scratch. Put the renewal date in your calendar with a 90-day warning, not a 7-day one.
Insurance and bonding
The individual plumber license carries no bond. Plumbing Contractor registration with IDPH requires a $20,000 surety bond under the Illinois Plumbing License Law (225 ILCS 320) plus a certificate of general liability, property damage and workers' compensation insurance; registration cannot be issued or stay valid without the certificate in force. Verify current minimum limits with IDPH.
Separately from whatever the state requires: Pipe Well requires every plumber on the network to carry current general liability insurance and to upload the certificate before the first appointment is sent.
Working across state lines
We could not confirm any published reciprocity agreement for Illinois. That does not always mean there is none — several states evaluate out-of-state licenses case by case, or let you sit for the exam on the strength of a license held elsewhere. If you are relocating, call the board and ask specifically about endorsement or credential review rather than assuming you start over.
What plumbers actually get wrong here
Illinois is genuinely unusual: plumbers are licensed by the Department of Public Health — a health agency — rather than a professional-regulation department, and there is no journeyman/master hierarchy at all. You are either an Apprentice or a Licensed Plumber, which means an out-of-state master has no equivalent rank to transfer into and Illinois grants no reciprocity, so relocating licensees start with a documented Illinois apprenticeship. There is no exam-only shortcut; the apprenticeship must be served under a sponsoring licensed plumber and is capped at six years, after which an apprentice who has not passed the exam simply cannot renew. Note the two-license structure: your personal April 30 renewal with 4 CE hours is separate from the company's Plumbing Contractor registration, which carries the $20,000 bond and insurance certificate. Chicago layers its own city plumber licensing on top of the state license for work inside city limits.
Once you are licensed: getting the work
A license gets you legal. It does not get you a full schedule. The usual next step is buying leads — $40 to $85 for a contact that three or four other shops bought at the same moment, which at a realistic 10–20% close rate works out to somewhere between $300 and $1,000 for every job you actually book, plus the unpaid hours spent chasing the ones that go nowhere.
Pipe Well works the other way round. We book appointments, not leads, and we handle everything up to the moment you knock on the door: the advertising, the phone call, qualifying the job, getting the address and access details, and agreeing a date and time window with the homeowner. What reaches your phone is a scheduled appointment — name, address, time window and what is wrong. You reply YES and it is yours.
What it costs
Nothing to join. No subscription, no per-lead charge. You do the job, you set your own price, and you collect payment from the customer directly. Then Pipe Well is paid 50% of the job after your documented materials come off the top:
(amount collected − documented materials) × 50%
| Collected | Materials | Net | Pipe Well | You keep |
|---|---|---|---|---|
| $400 | $40 | $360 | $180 | $220 |
| $1,200 | $520 | $680 | $340 | $860 |
| $2,800 | $800 | $2,000 | $1,000 | $1,800 |
| $8,500 | $3,200 | $5,300 | $2,650 | $5,850 |
Due within 48 hours of the customer paying you. If they never pay, you owe nothing. And look honestly at that last row — on a big repipe our share is a large number. If your book is already full of $8,500 jobs you are better off filling that capacity yourself. We are worth most to a shop with open capacity it cannot currently fill.
Apply free → Run your own numbersQuestions plumbers ask about licensing in Illinois
Do you need a license to do plumbing work in Illinois?
Yes. Illinois Department of Public Health (IDPH) — Division of Environmental Health, Plumbing Program is the licensing authority for Illinois. Illinois is genuinely unusual: plumbers are licensed by the Department of Public Health — a health agency — rather than a professional-regulation department, and there is no journeyman/master hierarchy at all. You are either an Apprentice or a Licensed Plumber, which means an out-of-state master has no equivalent rank to transfer into and Illinois grants no reciprocity, so relocating licensees start with a documented Illinois apprenticeship. There is no exam-only shortcut; the apprenticeship must be served under a sponsoring licensed plumber and is capped at six years, after which an apprentice who has not passed the exam simply cannot renew. Note the two-license structure: your personal April 30 renewal with 4 CE hours is separate from the company's Plumbing Contractor registration, which carries the $20,000 bond and insurance certificate. Chicago layers its own city plumber licensing on top of the state license for work inside city limits.
Who issues the plumbing license in Illinois?
Illinois Department of Public Health (IDPH) — Division of Environmental Health, Plumbing Program. The official site is https://dph.illinois.gov/topics-services/environmental-health-protection/plumbing.html.
What license classes exist in Illinois?
Apprentice Plumber — must be at least 16 and sponsored by an Illinois licensed plumber or an approved apprenticeship program. Licensed Plumber — Illinois' single individual plumbing license; there is no separate journeyman or master tier. Plumbing Contractor — business registration with IDPH, required to contract plumbing work. Irrigation Contractor and Retired Plumber — additional statuses regulated by the same program.
How many hours of experience do you need for a Illinois plumbing license?
At least 4 years employed as a licensed Illinois apprentice plumber. The apprenticeship period is capped at 6 years — an apprentice who does not sit for (or does not pass) the plumber exam within that window loses eligibility to renew the apprentice license. Applicants must also have completed at least 2 years of high school or the equivalent plus an approved course of instruction through a college, university or trade school.
Who administers the Illinois plumbing exam?
State-administered by IDPH. Examination applications must be submitted at least 30 days before the exam date with the required fee; IDPH sets the test dates and sites rather than using an open-scheduling national vendor.
How often does a Illinois plumbing license renew?
Annual — every plumber license expires April 30 (initial licenses issued after February 15 run to the following April 30). Four hours of IDPH-approved continuing education are required each year as a condition of renewal.
Can I get booked plumbing appointments in Illinois once I am licensed?
Yes. Pipe Well Plumbing books customer appointments in Illinois and texts them to licensed plumbers whose service radius covers the address. Joining is free — no subscription and no per-lead fee. Pipe Well is paid 50% of the job after your documented material costs are deducted, and only after the customer has paid you.
Booked appointments in Illinois
Set your ZIP and a service radius of at least 30 miles and we will match appointments inside it. Free to join.
Join Free → Plumbing jobs in IllinoisPlumbing license requirements in other states
Compiled from Illinois Department of Public Health (IDPH) — Division of Environmental Health, Plumbing Program published materials, last reviewed July 2026. Where a figure could not be verified against a primary source we have said so rather than estimate it. Spotted something out of date? Email info@pipewellplumbing.com and we will correct it.