In unincorporated Douglas County (including Highlands Ranch), solid fences may not exceed 6 feet, and no more than 4 feet where they sit within the required street setback. Open woven-wire or ornamental-iron fences have no height cap.
The Douglas County Zoning Resolution caps solid residential fences at 6 feet, dropping to 4 feet inside the required front/street setback so corner and driveway sightlines stay clear. Fences that are at least 80% open (woven wire, ornamental iron) have no height limit but still need a permit above 6 feet. Incorporated towns like Castle Rock, Parker, and Lone Tree set their own limits (Castle Rock allows 48 inches in front yards, 72 inches elsewhere). HOAs and the Highlands Ranch metro-district covenants may be stricter than county code.
A fence exceeding these limits is a zoning violation; the county may order repair, lowering, or removal and issue notices under its zoning enforcement authority.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Douglas County, CO
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See how Douglas County's height limits rules stack up against other locations.
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