What a plumbing website in Chicago has to show: the license rules that apply, the counties you can serve, and a free audit of the site you have now.
Free, on this page. Or get your free demo. Nothing to pay until it's delivered.
Businesses: plumbing, heating and air-conditioning contractors with paid staff in the Chicago-Naperville-Elgin, IL-IN metro. Census County Business Patterns, 2023. Counties: Census metro and county estimates, 2024.
License
What Chicago asks of a plumbing business, and where your website comes in.
Checked 2026-10-05 at each source. Not legal advice: rules change, so check with the board before you rely on one.
State · Illinois Department of Public Health
Illinois makes the plumbing license number part of every plumbing ad.
“No person who provides plumbing services may advertise those services unless that person includes in the advertisement the license number”
City · City of Chicago Department of Buildings
Plumbing contractor license
Inside the city, the Department of Buildings also licenses plumbing contractors.
On your website
Put the number in the footer of every page and beside every quote form, under the business name it is issued to. Read every page as an ad: that is the safe reading of these rules.
Service area
The Chicago-Naperville-Elgin, IL-IN metro: 13 counties in 2 states.
Illinois law holds across the state; City of Chicago licenses cover work inside the city. The metro also reaches four Indiana counties, where neither applies.
Census metro and county estimates, 2024Census County Business Patterns, 2023, by county
Plumbing, heating and air-conditioning contractors with paid staff, by county, 2023.
Free audit
Type your website and get a plain report, written for plumbing businesses. Then compare it with the license and service area notes above.
Written for plumbing businesses.
Every finding is something we measured on your site. Nothing is guessed.
A free demo of your new site in 48 hours.
Nothing to pay until it's delivered.
Then 7 days to pay, 10% off if paid within the first 48 hours.
More pages
Everything a plumbing site needs, wherever you work, is on one page.
Plumbing, the full pageNext step
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