Arapahoe County, CO Fence Regulations: Height Limits (2026)

C, Requirements of Fences, sets the baseline height ceilings that apply to all fences enclosing a lot, or more than 15 percent of a lot, in unincorporated Arapahoe County. 2 caps any fence erected in front of a building on a zone lot at three feet in height, except where another part of the Fence Regulations chapter says otherwise. B, but may not exceed six feet in height, excluding hedges. That same provision adds a corner-lot condition -- a side-yard fence generally can't extend past the lot's own front building line, or the neighboring lot's front building line (whichever sits closer to the rear lot line), unless the property owner provides a minimum 16-foot sight-distance triangle and sets the fence back at least eight feet from the side, corner property line.

Elsewhere in the same section, masonry walls along a major collector or arterial street can reach eight feet under separate engineering and design conditions, and fences in the B-3, B-4, I-1 and I-2 industrial-commercial zone districts can reach eight feet if built of Class 3 chain-link construction; tennis-court enclosures can run up to 12 feet. On any corner lot, a further sight-triangle rule bars walls, fences, signs, structures or obstructive plant growth over three feet tall within a triangle measured 30 feet along the front and side lot lines from their intersection. These height limits apply only to unincorporated county land, not to fences inside Aurora, Centennial, Littleton, Englewood or the county's other incorporated cities.