Caldwell, ID Sign Regulations: Garage Sale Signs (2026)

Caldwell folds garage-sale signage rules into the same section that regulates the sales themselves, Caldwell City Code § 06-15-01(7), Advertising Of Garage, Yard Or Similar Sales. A seller may post no more than four temporary signs identifying, promoting, advertising or directing patrons to a single sale; a fifth sign, even a small one, is unlawful. Every sign is capped at six square feet of area, so a single large sheet exceeding that size violates the ordinance even if it is the only sign posted. Placing any sign on someone else's property requires that owner's permission first; posting without it is unlawful regardless of the sign's size or count.

Once the sale ends, the clock starts: all sale signage must come down within 24 hours of the sale's conclusion, so weekend sellers cannot leave signs up through the following week. The ordinance also bans sale signs outright from any public right-of-way, meaning medians, sidewalk strips and road shoulders are off-limits, and separately bars mounting them on telephone or power poles regardless of location, or on any structure, box, facility, tree, fence, sign, pole or bench sitting within a right-of-way. Signage placed in violation of these right-of-way rules is subject to immediate removal and disposal by city staff without notification, so a seller who plants a sign on a utility pole risks losing it without warning rather than getting a citation first. The underlying sale itself remains governed by the frequency and duration limits in Caldwell City Code § 06-15-01(1).