Antioch, CA Sign Regulations: Garage Sale Signs (2026)

509 governs signage in the R-1, R-2, R-3, R-4, and P-D residential districts, where flat signs, projecting signs, billboards, and other advertising devices are otherwise banned outright under division (B)(1). Garage and rummage sale signs are carved out as an exception in division (B)(2), but only when in compliance with three specific conditions. First, temporary signs cannot exceed four square feet and must be on-site only, meaning a resident cannot post a directional sign on someone else's lot or in the public right-of-way to steer traffic to the sale.

Second, the sign cannot be attached to any utility pole, fence, tree, other vegetation, or placed upon any public right-of-way, ruling out the common practice of zip-tying a sign to a street sign post or stapling it to a tree. Third, the sign must come down within one day after the sale concludes; a sign left up longer becomes a code violation even if it was lawfully posted during the sale itself. The exception applies specifically to 'duly licensed' rummage and garage sales, tying back to the city's separate business-license and sale-permit requirements for these events.

518, under which Police, Building Inspection, or Public Works staff, or the Code Enforcement Officer, may remove noncompliant signs and take them to the Maintenance Service Center.