4 county-level rules, plus city-specific rules for 5 cities in Santa Clara County, California.
Verified from official government sources
Santa Clara County permits political signs on private property with content-neutral size and placement rules protected under the First Amendment.
Cal. Civ. Code § 4710
(a) The governing documents may not prohibit posting or displaying of noncommercial signs, posters, flags, or banners on or in a member's separate interest, except as required for the protection of public health or safety or if the posting or display would violate a local, state, or federal law. (b) For purposes of this section, a noncommercial sign, poster, flag, or banner may be made of paper...
Santa Clara County Title C zoning prohibits new off-premises digital billboards in unincorporated areas. The California Outdoor Advertising Act sets statewide controls along Interstate and primary highways and requires Caltrans permits for any roadside display.
Santa Clara County Title C zoning limits window signs in unincorporated commercial districts to roughly 25 percent of the window area. Larger temporary banners and obstructive signage trigger sign-permit review by the Planning Department.
Signs visible to motorists on US-101, I-280, I-680, I-880, SR-85, and SR-87 require both Caltrans Outdoor Advertising approval and County zoning sign permits. The Outdoor Advertising Act preempts inconsistent local rules along these routes.
5 cities in Santa Clara County have their own sign regulations rules. Each link goes to that city's dedicated page with code citations.
6 verified rules • Digital Billboards, Freeway-Facing Signs
3 verified rules • Garage Sale Signs, Holiday Displays
3 verified rules • Garage Sale Signs, Holiday Displays
3 verified rules • Garage Sale Signs, Holiday Displays
3 verified rules • Garage Sale Signs, Holiday Displays
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