Do I need a permit for electrical panel or service upgrade in Naperville?
Yes. In Illinois, electrical panel or service upgrade generally requires a permit, and Naperville is no exception.
Replacing or upgrading an electrical service panel requires an electrical permit in essentially all Illinois jurisdictions and must meet the adopted National Electrical Code. Most local codes require utility disconnect coordination and grounding/bonding upgrades to current code. Naperville requires a permit for electrical work, which includes a service or panel upgrade. Only minor repairs (such as replacing lamps or connecting approved portable equipment to existing receptacles) and certain low-voltage work under 25 volts and 50 watts are exempt. All electrical installations must be performed by a state-licensed electrical contractor who is registered with the City of Naperville. Naperville operates its own municipal electric utility, so service coordination is handled through the City. The City adopts the 2023 National Electrical Code (NFPA 70) as amended (effective April 1, 2026). Permits are filed and managed through the City's Civic Access portal.
Documents you may need
- Electrical load calculationLikely required
- Panel/service equipment spec sheetSometimes required
- Licensed electrical contractor informationLikely required
- Electrical permit application through the City's Civic Access permit portalrequired
- Copy of the state electrical contractor license and City of Naperville electrical contractor registrationrequired
- Development Petition and Disclosure of Beneficiaries formsSometimes required
Possible inspections
- Rough electrical/service inspection
- Utility coordination for service reconnect
- Final inspection
- Electrical service and rough inspection by the TED Business Group
- Final electrical inspection
Frequently asked questions
- Do I need a permit for electrical panel or service upgrade in Naperville?
- Yes. In Illinois, electrical panel or service upgrade generally requires a permit, and Naperville is no exception. Replacing or upgrading an electrical service panel requires an electrical permit in essentially all Illinois jurisdictions and must meet the adopted National Electrical Code. Most local codes require utility disconnect coordination and grounding/bonding upgrades to current code. Naperville requires a permit for electrical work, which includes a service or panel upgrade. Only minor repairs (such as replacing lamps or connecting approved portable equipment to existing receptacles) and certain low-voltage work under 25 volts and 50 watts are exempt. All electrical installations must be performed by a state-licensed electrical contractor who is registered with the City of Naperville. Naperville operates its own municipal electric utility, so service coordination is handled through the City. The City adopts the 2023 National Electrical Code (NFPA 70) as amended (effective April 1, 2026). Permits are filed and managed through the City's Civic Access portal.
- Who issues the permit in Naperville?
- The local building department for Naperville handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.