Solano County, CA Sign Regulations: Window Signs (2026)
Key Facts
- Rule
- Window signs capped at 33% of window area
- Citation
- Sec. 28.96.100(F)(1)
- Covers
- Permanent and temporary window signs
- Applies to
- All unincorporated zoning districts
- Permit
- Not exempt under Sec. 28.96.50; minor permit applies
- Enforcement
- Public nuisance under Sec. 28.96.120/Sec. 28.113
Summary
Window signs in unincorporated Solano County cannot cover more than 33 percent of the total window area under Zoning Code Section 28.96.100(F)(1). The cap applies to both permanent and temporary signs posted, painted, or displayed in or on a window facing public view, and it holds in every zoning district countywide with no size exception by district or use.
F. Window signs. The following standards apply to window signs in all zoning districts: 1. Maximum sign area. Permanent and temporary window signs shall not occupy more than 33 percent of the total window area.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 1868, passed April 9, 2026).
Full Breakdown
100 (Standards for Specific Types of Signs) sets subsection F aside specifically for window signs, and it applies the 33-percent ceiling 'in all zoning districts,' meaning the same limit governs a farm stand along a rural road and a commercial storefront on a county arterial alike. 20 defines a 'Window Sign' broadly: a sign posted, painted, placed, or affixed in or on a window exposed to public view, and also an interior sign facing a window that sits within three feet of the glass, so signage displayed just inside the storefront counts toward the same 33-percent cap as signage stuck directly to the glass.
The rule covers both permanent and temporary window signage, so seasonal sale banners taped inside a window are measured against the same limit as a business's painted storefront lettering. 100. 110, which lets the Planning Commission adjust total allowable signage for the site as a whole.
Violations & Fines
Signs that violate the sign ordinance, including oversized window signs, are declared a public nuisance under Section 28.96.120 and enforced under Section 28.113. The Zoning Administrator issues a notice of violation specifying the corrective action and deadline; an uncorrected violation becomes an infraction under Section 28.113(I) with a fine capped by Government Code Section 25132, and each day of continued violation counts as a separate offense. Notices of violation may be appealed under Section 28.112, and the county can also pursue civil injunctive relief or Chapter 10 abatement.
Frequently Asked Questions
How much of my storefront window can I cover with signage in unincorporated Solano County?
Does the 33 percent limit apply to a temporary sale banner taped inside the glass?
Do I need a permit to put up a window sign?
Sources & Official References
Other rules in Solano County
California rules heatmap·Compare Solano County to another location·View the California sign regulations overview
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