Naperville, IL Home Business: Signage Rules (2026)
Key Facts
- Sign area cap
- 4 sq ft, wall OR ground sign only
- Ground sign setback
- min 5 ft from every property line
- Illumination
- external only, no internally lit signs
- Prerequisite
- home occupation must already be a permitted use
- General penalty
- $100-$500 per day (§1-4-1)
Summary
A Naperville home occupation may display only one sign under Municipal Code section 6-16-4, subsection 2.2: a wall sign of no more than 4 square feet, or a ground sign of no more than 4 square feet set back at least 5 feet from every property line. If illuminated, subsection 2.2.3 permits only external illumination, and the two sign types cannot be combined.
2.2Home Occupation Sign: Properties with a permitted home occupation shall be limited to one of the following sign types, as regulated below:2.2.1Wall Sign: One wall sign not to exceed four (4) square feet in area. OR
2.2.2Ground Sign: One ground sign not to exceed four (4) square feet in area setback a minimum of five (5) feet from any property line.2.2.3If illuminated, only external illumination is permitted.2.3Office Uses permitted as Principal Uses by Conditional Use permit, in accordance with the procedures outlined in 6-3-8, shall be permitted signage in accordance with Section 6-16-6:4 (Properties Zoned Transitional Use (TU)) of this Section. (Ord. No. 17-006, § 3, 1-17-2017; Ord. No. 22-121, § 2, 11-15-2022)
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
2). 3 adds that 'if illuminated, only external illumination is permitted,' ruling out internally lit or backlit home occupation signage entirely. This is far tighter than the standard residential sign allowances in the same section: a for-sale or construction yard sign on the same lot can run up to 6 square feet, and a qualifying subdivision entrance sign can reach 32 square feet, underscoring that the 4-square-foot cap is specific to identifying a home-based business rather than the property generally. Because a permitted home occupation is a prerequisite, the sign allowance only applies once the underlying home occupation use itself is authorized elsewhere in the zoning title; a sign for an unpermitted home business is not covered by this exemption and does not benefit from any exempt-sign status under subsection 1 of this Section.
Office uses approved as a principal use by conditional use permit follow a different signage track entirely, keyed to the Transitional Use district standards in section 6-16-6, subsection 4, rather than the home occupation limits.
Violations & Fines
A home occupation sign larger than 4 square feet, internally illuminated, or combining both a wall and ground sign on the same lot exceeds section 6-16-4, subsection 2.2 and is enforced as a Chapter 16 violation, subject to Naperville's general penalty, Municipal Code section 1-4-1: $100 to $500 per offense, with each day of continued display a separate offense.
Frequently Asked Questions
How big can a home business sign be in Naperville?
Can I light up my home occupation sign at night?
How far back does a home business ground sign need to be from the property line?
Sources & Official References
Other rules in Naperville
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