Naperville, IL Building Safety: Electrical Permits (2026)
Key Facts
- Adopted code
- 2023 NEC (NFPA 70-2023) + ICC Electrical Code
- Deleted from NEC
- §603 Alternative Engineered Design; Ch. 11 Appeals
- Base building permit fee
- $182.00 (residential)
- Inspection fee range
- $50-$228 by square footage
- Code on file
- Transportation, Engineering & Development office
- Penalty
- $100-$500 per offense (general penalty)
Summary
Naperville wires its permitting to the 2023 National Electrical Code under Municipal Code Section 5-1F-1, adopted as NFPA 70-2023 alongside the ICC Electrical Code, both amended locally. Section 5-1F-2 deletes the NEC's alternative engineered design option and its entire means-of-appeal chapter, and a copy of both adopted codes stays on file at Transportation, Engineering and Development for public inspection.
5-1F-1: - ADOPTION: 1.For the purposes of supplementing the provisions and regulations contained in this Title, and for setting forth minimum standards for the installation of electrical wiring, the City hereby adopts by reference the standards, specifications, rules and regulations of the National Fire Protection Association as compiled and published as the National Electrical Code, 2023 edition (NFPA No. 70-2023) (hereinafter referred to as the NEC), and the 20 ICC Electrical Code, as amended.2.One (1) copy of each shall be kept on file in the office of the Department of Transportation, Engineering and Development Business Group for public inspection. (Ord. No. 06-301, 12-19-2006, eff. 1-1-2007; Ord. No. 12-159, § 1(Exh. A), 12-18-2012; Ord. No. 18-141, § 2, 12-4-2018; Ord. No. 26-010, § 2, 2-17-2026)
5-1F-2: - AMENDMENTS: 1.Section 603, Alternative Engineered Design: Delete in its entirety.2.Chapter 11, Means Of Appeal: Delete in its entirety. (Ord. No. 02-31, 2-19-2002, eff. 4-8-2002; Ord. No. 12-159, § 1(Exh. A), 12-18-2012)
5-1F-3: - BRANCH CIRCUITS:
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 101).
Full Breakdown
Section 5-1F-1 adopts, "for the purposes of supplementing the provisions and regulations contained in this Title, and for setting forth minimum standards for the installation of electrical wiring," the standards of the National Fire Protection Association "as compiled and published as the National Electrical Code, 2023 edition (NFPA No. " Section 5-1F-2 then strips two pieces out of the adopted NEC: "Section 603, Alternative Engineered Design" is deleted in its entirety, removing the option to substitute an engineered design for prescriptive compliance, and "Chapter 11, Means Of Appeal" is likewise deleted, meaning electrical code disputes route through the city's ordinary building permit appeal process rather than an NEC-specific one.
Later sections of Article F add local amendments to specific NEC provisions, including branch-circuit arc-fault protection requirements in Section 5-1F-3. 00 for homes over 9,000 square feet, covering all trade inspections together.
Violations & Fines
No fine is written into Article F itself, so an electrical code violation, unpermitted wiring, work that doesn't meet the amended 2023 NEC, or a missed inspection falls under Naperville's general penalty, Section 1-4-1: $100.00 to $500.00 per offense, with each day the violation continues counted as a new offense. The Chief Building Official can also red-tag unpermitted or noncompliant electrical work and withhold occupancy until it is corrected and reinspected.
Frequently Asked Questions
What electrical code does Naperville enforce?
Can I use an alternative engineered design instead of following the NEC's prescriptive rules?
How much is a residential electrical inspection in Naperville?
Sources & Official References
Other rules in Naperville
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