Simi Valley, CA Sign Regulations: Window Signs (2026)
Key Facts
- General window sign cap
- 40% of glass surface
- Neon window sign cap
- Under 20% of glass surface
- Permit required
- No permit for window signs
- Neon movement
- Cannot rotate, flash, or vary intensity
- Window sign definition reach
- Includes signs within 2 feet of glass
Summary
Temporary window signs in Simi Valley cannot cover more than 40 percent of the glass surface they are attached to, and no permit is required to post them. Neon window signs are held to half that allowance and cannot flash, rotate, or vary in brightness.
1.Window signs. Temporary signs attached, glued, painted, resting upon, or otherwise affixed to a window glass surface shall not obscure or render opaque more than 40 percent of the exterior glass surface upon which it is affixed or painted. Signs mounted within two (2) feet of the exterior glass surface shall be considered window signs. Neon signs shall measure less than half of the allowed 40 percent coverage, and shall not rotate, move, flash, blink, or vary in intensity. The area of window signs shall be measured using the method described in Section 9-37.050 (General requirements for all signs). Temporary windows signs do not require a permit.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 51).
Full Breakdown
070(D)(1) governs temporary signs attached, glued, painted, resting upon, or otherwise affixed to a window glass surface, and any sign mounted within two feet of the exterior glass counts as a window sign under this rule. The coverage cap is 40 percent of the exterior glass surface the sign is affixed to or painted on. Neon window signs are held to a tighter standard: they must measure less than half of the 40 percent allowance, meaning under 20 percent of the glass, and cannot rotate, move, flash, blink, or vary in intensity.
050, enclosing the display within a single continuous perimeter line. 070(C), including a ban on internal illumination and a requirement that any supporting attachment be removed once the sign comes down. 070(G) and (H).
Violations & Fines
A window sign that exceeds the 40 percent coverage cap, or a neon window sign that exceeds 20 percent coverage or flashes or rotates, is a Development Code violation and, if not corrected, may be treated as a public nuisance under SVMC Section 9-37.090(A), subject to removal proceedings under Chapter 9-78 (Enforcement of Development Code Provisions).
Frequently Asked Questions
Do I need a permit to put a sale sign in my Simi Valley storefront window?
Can I install a flashing neon 'open' sign in my window?
Does a sign displayed just inside my window count toward the coverage limit?
Sources & Official References
Other rules in Simi Valley
California rules heatmap·Compare Simi Valley to another location·View the California sign regulations overview
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Window Signs in Nearby Cities
How other cities in Ventura County handle window signs.