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

Garage sale and yard sale signs are treated as temporary non-commercial signs under Antioch Municipal Code Title 9 Chapter 9-5. On private property (including the front yard of the host home or a friend's consenting property), small directional and event signs are permitted without a permit, typically up to 6 square feet, displayed only during the sale and removed immediately after. Posting signs in the public right-of-way — stapled to utility poles, zip-tied to stop signs, stuck in medians or parkway strips — is prohibited under Streets & Highways Code §1460 and AMC nuisance provisions. Public Works crews routinely sweep neighborhoods and remove illegally placed signs; repeat offenders can be cited under administrative fine provisions ($100/$200/$500 escalating per AMC Chapter 1-3). Signs attached to traffic control devices are a violation of California Vehicle Code §21465 (prohibition on unauthorized signs, signals, or devices) and can be misdemeanors. Best practice for Antioch residents: use freestanding yard signs on participating private property with the host's permission, keep signs modest in size and readable, and collect every sign the same day the sale ends. Some HOAs in Antioch (Lone Tree, Deer Valley, Vineyards area subdivisions) have specific rules about event signage in common areas and limit the number and frequency of garage sales — check CC&Rs. The city does not require a business license or permit for bona fide residential garage sales, but frequency limits apply (see garage-sales/frequency subcategory).