All plumbing contractors – regardless of whether you have registered with the City of Naperville in the past – will be required to provide the following documents along with any building permit applications where plumbing work is being performed:

• Copy of State Contractor’s Registration
• Letter of Intent (click to view sample)

These items will be required for every permit/job in the City from this day forward and are meant to verify credentials, protect contractors from identity theft and ensure continued safety on all Naperville job sites.

Applications without completed documentation will not be considered.

Download the Plumbing Permit Application (PDF). For details on the permitting process, including submittal, reviews, fees and issuance, visit the Building Permits page.