Will County, IL Sign Regulations: Window Signs (2026)
Key Facts
- Max size
- 64 sq ft per window
- Window coverage cap
- 33% of window area
- Per-business total
- 100 sq ft displayed at once
- Mounting
- Interior only, not on exterior
- Applies to
- Unincorporated county only, not Joliet
Summary
Unincorporated Will County caps temporary window signs at 64 square feet and 33% of window area, with a 100-square-foot total per business.
Temporary window signs are allowed when a sale of goods or services is being conducted by a business establishment located on the premises. Such signs are allowed in addition to all other authorized signs, provided they do not exceed 33% of the area of the window to which they are affixed. Temporary window signs may not exceed 64 square feet in area, regardless of the size of the window to which it is affixed, and no establishment may have more than 100 square feet of temporary window signs displayed at any one time. No temporary window sign may be affixed to the exterior of any window, wall or other exterior surface of the structure. Temporary window signs that advertise or pertain to sales or events that have already occurred or that are substantially tattered, discolored, frayed, ripped, or otherwise in a state of visible disrepair are prohibited and must be removed.
(6) Holiday decorations. Holiday decorations on private property clearly incidental, customary, and commonly associated with national, local or religious holidays are allowed, provided they are displayed for a period of not more than 60 days for each holiday.
(7) Agricultural test plot signs. Signs used to mark test plot areas within a farm field, including seed test areas are allowed without a permit. Such signs may not exceed 32 square feet in area.
(D) Other signs. The following additional signs are allowed without a sign
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2025 S-25: Supplement contains: Local legislation current through Ordinance No. 24-100, passed 4-18-2024 and Res. 23-387, passed 11-16-2023; and State legislation approved through 2024 Pamphlet #2).
Full Breakdown
In unincorporated Will County, temporary window signs are allowed without a permit only while a business on the premises is running a sale of goods or services. They can't cover more than 33% of the window they're mounted in, can't exceed 64 square feet regardless of window size, and no single establishment may display more than 100 square feet of temporary window signage at once. Signs can't be affixed to the exterior of any window, wall, or surface, and worn, torn, or outdated ones must come down.
Violations & Fines
Zoning Administrator enforcement; oversized, exterior-mounted, or tattered/outdated temporary window signs must be removed.
Frequently Asked Questions
Do I need a permit for a sale sign in my store window?
Does this apply inside Joliet or Bolingbrook?
Sources & Official References
Other rules in Will County
Compare Will County to another location·View the Illinois sign regulations overview
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