Independent Educational Guide: Illinois residential solar permit facts, sourced, dated, and confidence-scored. Not legal, engineering, or permit advice.

Naperville Solar Permit Guide

Naperville Electric Utility territory · DuPage County

Naperville Solar Permit Checklist
Printed from mygridpermit.com/illinois/naperville/solar-permit-guide/ · Last verified 2026-08-13 · City of Naperville Building Department / Naperville Electric Utility · Verify current requirements before relying on this checklist. Programs and fees change.
✓ Last verified 2026-08-133 official sources
Informational only. This page is not legal, engineering, or permit advice. Every fact below links to the official source it came from and shows how confident we are in it. Verify current requirements with City of Naperville Building Department and Naperville Electric Utility before making a decision.

Overview

GridPermit collects Illinois residential solar and permitting facts directly from official sources (city, county, and state government sites, utilities, and public utilities commissions) and shows only what we can verify, with a confidence score and a link to where it came from. Nothing here is estimated or inferred beyond what's stated below. See our methodology for the rules this page follows.

Battery/solar incentive program on record

No battery/storage incentive program is on record for this locality.

Permit fees

Not yet verified.

Rebates

Naperville Rooftop Solar Incentive (Residential Energy Efficiency Incentives program)

A residential rebate for a roof-mounted solar array or a solar water heater system, administered alongside Naperville's other residential energy-efficiency incentives (attic insulation, single-pane window replacement, AC tune-up, furnace blower motor replacement) under a single shared annual budget. As of 2026-06-26, the City's own page states the program's $280,000 total annual budget across all of these incentive categories (including Rooftop Solar) has been 100% awarded, and applications are closed for the remainder of the 2026 calendar year. Third-party sources report a rate of $250 per kW AC (inverter-rated), capped at $1,750 (7 kW AC max) and requiring a $5/month, 5-year contribution to the Naperville Renewable Energy Program — this specific dollar figure was not independently confirmed from a City of Naperville page fetched this session and should be verified directly before relying on it.

Status on file: unknown. Verify current status before relying on this.

Confidence: Medium (0.6)

Source(s): Residential Energy Efficiency Incentives

Utility and generation supplier

Utility

Naperville Electric Utility

Confidence: High (0.95)

Source(s): Solar Panel Guidelines

Generation supplier

Naperville Electric Utility (utility)

Municipal utility — recorded as both the distribution and default generation utility.

Confidence: Medium (0.6)

Source(s): Solar Panel Guidelines

Interconnection

https://www.naperville.il.us/services/electric-utility/powering-our-community-for-the-future/1/net-metering/

Confidence: High (0.9)

Permit authority

City of Naperville Building Department

Illinois has no single statewide residential solar permitting rule — permitting authority sits with the local municipality (inside its boundaries) or the county (in unincorporated areas). Naperville's own Building Department issues the building permit; a separate Interconnection Agreement with Naperville Electric Utility is also required.

Confidence: High (0.9)

Source(s): Solar Panel Guidelines

Permit page: https://www.naperville.il.us/services/electric-utility/powering-our-community-for-the-future/solar-panel-guidelines/

Required documents

  • Interconnection Agreement, signed by both the customer and the City (via the City's Gov QA system / DocuSign) (required when: always, before interconnection approval)

Confidence: Medium (0.75)

Source(s): Solar Panel Guidelines

Inspection steps

  • Customer obtains a City of Naperville building permit
  • System is installed
  • Final electrical inspection performed by a City of Naperville electrical inspector
  • Permission to operate is granted only after the system passes the final electrical inspection

Confidence: High (0.85)

Source(s): Solar Panel Guidelines

Eligibility constraints

  • Property types: residential
  • Max system size (AC): Not yet verified.
  • Max system size (DC): Not yet verified.
  • Max thermal capacity: Not yet verified.
  • Program/pathway: Not yet verified.
  • Other conditions:
    • As of a 2025 program update, Naperville Electric Utility eliminated its previous size restriction on solar arrays
    • For net metering, the system must be customer-owned (leased systems are not eligible for net metering) and 'reasonably sized as determined by the Utility' to offset the customer's own electrical requirements
    • Properties within the Naperville Historic District require a Certificate of Appropriateness (COA) from the Historic Preservation Commission before installation
    • Equipment must meet national electrical standards (NEC, NESC) and applicable local building/fire codes

Confidence: High (0.85)

Source(s): Solar Panel Guidelines, Net Metering

Official contacts

Confidence: High (0.8)

Need a solar installer who handles permits in Naperville?

EnergySage is an independent solar marketplace where you can request property-specific pricing from installers familiar with local permitting.

Compare quotes from solar installers →

You'll continue on EnergySage's website. GridPermit has a partner relationship with EnergySage; this link is not currently tracked, and whether the partnership results in compensation to GridPermit has not yet been confirmed.

Sources

Frequently Asked Questions

What utility serves solar customers in Naperville, Illinois?

Naperville Electric Utility is the interconnection and distribution utility for Naperville. The default electricity generation supplier is Naperville Electric Utility, a utility, separate from Naperville Electric Utility.

What documents are required for a solar permit in Naperville?

Commonly required documents include: Interconnection Agreement, signed by both the customer and the City (via the City's Gov QA system / DocuSign).

Who do I contact about solar permits in Naperville?

City of Naperville, Sustainability (Residential Energy Efficiency Incentives), phone 630-305-5357, email SchieldP@naperville.il.us.

Disclaimers: This page is for informational purposes only and is not legal, engineering, financial, tax, or permit advice. GridPermit is not a solar installer, contractor, engineering firm, public utility, or government agency. Requirements, fees, and program terms change. Verify current requirements with City of Naperville Building Department and Naperville Electric Utility before starting a project. Last verified 2026-08-13.

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