Winnebago County, IL Sign Regulations: Window Signs (2026)
Key Facts
- Coverage cap
- 40% of total window area
- Permit
- No permit required if compliant
- Neon placement
- Must be entirely inside window
- Neon accent trim
- Specifically prohibited
- Neon districts
- C-N, C-C, C-G, TND, industrial (commercial use)
Summary
Window signs are exempt from a sign permit as long as all of them combined cover no more than 40% of the total window area.
Window Signs. Window signs shall be exempt from sign permit requirements, provided that the total of all window signs, whether temporary or permanent, shall occupy no more than forty percent (40%) of the total window area. Neon window signs are subject to the following: A. Neon window signs must be located entirely inside the window. No exterior neon signs are permitted.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 64).
Full Breakdown
Winnebago County's Unified Development Ordinance exempts window signs from permitting, but caps total coverage at 40% of the window's area, counting temporary and permanent signs together. Neon window signs get extra rules: they must sit entirely inside the glass, exterior neon is banned outright, and neon accent lighting tracing window or building outlines is specifically prohibited. Neon window signs are also confined to the C-N, C-C, C-G, and TND districts and industrial districts where a commercial use is allowed on site.
Violations & Fines
Exceeding the 40% window-area cap, mounting neon signs outside the window, using neon trim/accent lighting on windows or buildings, or placing neon window signs outside the permitted commercial/industrial districts.
Frequently Asked Questions
Do I need a permit for a window sign in Winnebago County?
Can I put a neon sign in my storefront window outside the C-C or C-G district?
Sources & Official References
Other rules in Winnebago County
Compare Winnebago County to another location·View the Illinois sign regulations overview
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