San Luis Obispo County, CA Sign Regulations: Freeway-Facing Signs (2026)
Key Facts
- Governing section
- County Code Sec. 22.20.060.C.3
- Max sign area
- 125 square feet
- Max height
- 50 feet above grade
- Permit required
- Conditional Use Permit
- Eligible location
- Adjacent to Highway 101 or frontage road
Summary
San Luis Obispo County allows an extra on-site freeway identification sign, up to 125 square feet and 50 feet tall, for commercial and office sites next to Highway 101 or its frontage road. Section 22.20.060.C.3 requires Conditional Use Permit approval first, and the Planning Commission can order the height reduced or increased case by case.
Freeway identification signs. In addition to the signs allowed by Subsection A., sites located in Office and Professional, Commercial Retail, and Commercial Service land use categories adjacent to Highway 101 or a Highway 101 Frontage Road may be authorized through Conditional Use Permit approval to use an on-site freeway identification sign with a maximum area not to exceed 125 square feet. The maximum height for freeway identification signs shall be 50 feet above grade, provided that the Commission may require a reduced or increased height where deemed appropriate.
Full Breakdown
060 sets the base sign allowances by land use category and then, in Subsection C, lists Specialized sign requirements layered on top of those base allowances. Item 3, Freeway identification signs, applies only to sites in the Office and Professional, Commercial Retail, and Commercial Service land use categories that sit adjacent to Highway 101 or a Highway 101 Frontage Road. 040. 2, reflecting that freeway signs need to be legible at highway speed and distance. Height is capped at 50 feet above grade, but the Planning Commission that hears the Conditional Use Permit can require either a reduced or an increased height where it finds that appropriate for the specific site, giving the county case-by-case control over how visible the sign is from the highway corridor. 20, are not allowed in that area.
Violations & Fines
Erecting a freeway identification sign, or exceeding the 125-square-foot area or Commission-set height limit, without first securing Conditional Use Permit approval is a zoning violation enforced by the Planning and Building Department, which can require the sign's removal or resizing; in planning areas where a community design standard separately bans freeway identification signs outright, no Conditional Use Permit can authorize one.
Frequently Asked Questions
Can any business along Highway 101 get a freeway sign?
Can the county require my freeway sign to be shorter than 50 feet?
Does the freeway sign add to or replace my other signage?
Sources & Official References
Other rules in San Luis Obispo County
California rules heatmap·Compare San Luis Obispo County to another location·View the California sign regulations overview
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