Residential Room Addition/Alteration Permit

Before beginning any new construction addition and/or alterations (including basement build-outs) to existing residential buildings, residents must obtain the necessary building permits.

As of Jan. 1, 2019, the City of Naperville has adopted the latest codebooks used for design and construction.

To apply for a permit, please visit the City of Naperville Permitting, Plans and Licensing Portal. The Permitting, Plans and Licensing Portal gathers all of the information needed to apply, pay for, and manage permits in one convenient place. It is designed for use on a desktop/laptop computer.

For details on the permitting process, including submittal, reviews, fees and issuance, visit the Building Permits page.