Garage sale signs allowed on private property in Lake County cities. Waukegan, Libertyville, and Gurnee prohibit signs on utility poles, traffic signs, and public right-of-way. Most caps: 4-6 sq ft, posted 24-48 hours before, removed 24 hours after sale.
Lake County municipalities treat garage/yard sale signs as temporary off-premises advertising. Rules are similar across Waukegan, Libertyville, Gurnee, Highland Park, Lake Forest, and Mundelein: maximum sign area 4 to 6 square feet, maximum 3 to 5 off-premises directional signs per sale, and placement restricted to private property with owner permission (never on utility poles, traffic sign posts, street trees, or public right-of-way). Signs typically may be displayed 24 to 48 hours before the sale and must be removed within 24 hours after. Some municipalities (Libertyville, Mundelein) require a garage sale permit — often free or $5 — that limits the number of sales per year to 2-3. Metal wire-frame yard signs in parkways are the most common violation and are routinely removed by public works crews. Highland Park also requires sales to end by sunset to limit nuisance traffic.
Signs on utility poles or traffic signs: immediate removal and $25 to $50 citation. Signs left past 24-hour removal window: $25 per day per sign. Operating without required permit (Libertyville): up to $100 fine.
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