Caldwell, ID Fence Regulations: Height Limits (2026)

Caldwell City Code § 10-02-07 sets fence height by location on the lot. On an interior lot's front yard setback area, open fencing tops out at four feet and solid fencing at three feet, with the fence set back five feet from an existing curb (or flush with an existing sidewalk edge). Along the interior side and rear property lines, open and solid fencing may reach six feet, but once a side fence passes twenty feet from the front property line its height drops to four feet (open) or three feet (solid).

Corner lots follow the same front-yard limits, plus a separate rule for the side property line adjoining a street: four feet maximum, set back five feet from the sidewalk or property line. Every one of these limits is overridden by the code's vision triangle rule: fencing over three feet is prohibited within the triangle formed by measuring forty feet along each of two adjacent roadway edges from their intersection and connecting those points with a straight line, using the curb (or where a curb would sit) as the roadway edge; driveways do not count as roadways for this measurement.

Electric, concertina, barbed and razor wire fences are barred citywide except for livestock containment and, above six feet of height, commercial/industrial fencing away from arterial frontages. The City Center (C-C) zoning district and Caldwell's designated historic districts follow their own separate fencing standards layered on top of these rules. The International Building Code requires a permit for some fences and walls, obtained through the Building Safety Division.