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Lake County, CA Sign Regulations: Window Signs (2026)

Few Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Permit
None required
Placement
Interior window surface only
Material
Paper, cloth, or painted
Purpose
Must promote a particular sale
Duration
Short period only
Coverage cap
No percentage set

Summary

Temporary sale signs painted on or taped to the inside of a storefront window are a permitted special-purpose sign under Lake County Zoning Ordinance Section 21-45.3(r), exempt from the sign permits and area limits that apply to permanent signage in the county's commercial districts.

These county ordinances apply to unincorporated areas of Lake County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

45.3 Special purpose signs - permitted: The following special purpose signs are permitted uses in all zoning districts, except as provided for in Section 45.23: ... (r) Temporary window signs painted directly onto the window or constructed of paper, cloth or similar expendable material that are affixed only to the interior window surface or painted onto the window surface for a short period of time to promote a particular sale of products or merchandise.

View official code

Official source re-checked September 8, 2026: the cited page had not changed since it was quoted.

Full Breakdown

3(r) exempts them from the sign-permit and area-limit system altogether by defining the exemption around material, placement and duration. To qualify, the sign must be painted directly onto the window glass or made of paper, cloth or similar expendable material, must be affixed only to the interior window surface (not free-standing or projecting), must be up for only a short period of time, and must promote a particular sale of products or merchandise rather than serve as permanent identification. 12 that apply to a business's permanent signage, such as the C1 district's cap of one-half square foot per foot of occupancy frontage or the 400-square-foot ceiling on total signage per occupancy in most commercial districts. 2(t), counting against the district's overall sign allowance. 3.

Violations & Fines

A window sign that outlasts the sale it promotes, is made of permanent materials, or is not confined to the interior glass surface forfeits the Section 21-45.3(r) exemption. The Community Development Department can then require the sign be counted against the district's sign-area limit under Section 45.11 or 45.12, obtain a standard sign permit, or remove it under Article 61 enforcement.

Frequently Asked Questions

Is there a percentage limit on how much of my storefront window I can cover with a sale sign in Lake County?
No. Section 21-45.3(r) of the Zoning Ordinance exempts temporary window signs from the sign-area limits entirely rather than setting a coverage percentage. The exemption instead depends on the sign being painted or paper/cloth material affixed to the interior glass, up for only a short time, and promoting a particular sale.
Do I need a sign permit for a 'Sale' sign taped inside my store window?
No, as long as it qualifies under Section 21-45.3(r): affixed only to the interior window surface, made of paper, cloth or similar expendable material or painted directly on the glass, displayed for a short period, and used to promote a particular sale of products or merchandise.
What happens if a window sign is left up permanently in Lake County?
A window sign that stays up indefinitely or uses permanent materials no longer qualifies as the temporary sign exempted under Section 21-45.3(r). It instead gets measured under the standard sign-area computation in Section 45.2(t) and counts toward the sign-area limits for the applicable district under Section 45.11 or 45.12.

Sources & Official References

Other rules in Lake County

All Lake County rules

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