Codes & permits
Plumbing permits in Naperville
Naperville handles plumbing permits through its online portal and has one rule that surprises contractors: paperwork with every application.
Calls are answered by a referral service that connects you with a local plumbing provider. How this works
All plumbing contractors must submit required documents with any building permit application that includes plumbing work, even if they have registered with the City before; applications without completed documentation will not be considered. Residential permits are applied for through the Permitting, Plans and Licensing Portal.
The City’s guide to building permits lists some work that does not need a permit, including in-kind water softener replacement.
Source: City of Naperville — Guide to Building Permits (PDF)
State vs. City
Plumbers are licensed by the State (IDPH). Naperville handles permits, inspections and contractor documentation. Illinois licensing
What we could not confirm
- Whether a like-for-like water heater replacement needs a permit (third-party sites say yes).
- Current plumbing permit fees.
- Details of Naperville’s local amendments to the Illinois Plumbing Code.
Check with the official source before relying on these points.
Related: Naperville plumbing help · water heaters · drain cleaning
Frequently asked questions
Who applies for the permit?
Usually the plumbing contractor, who must submit the required documentation with the application.
Does replacing a water softener need a permit?
The City’s guide lists in-kind water softener replacement among items that do not need a permit.
Sources
- City of Naperville — Plumbing Permit Official / primary
- City of Naperville — Guide to Building Permits (PDF) Official / primary
- Illinois Department of Public Health — Plumbing Program Official / primary
Information can change; official sources control.