In the zoned Billings/Yellowstone County jurisdiction, fences must stay within your lot lines, honor the 3-foot front-yard and 6-foot general height limits, keep clear-vision triangles at corners below 30 inches, and get a Planning permit at 3–6 feet. Rural unzoned land is unregulated.
The unified Chapter 27 code (Sec. 27-604, 27-615) governs fences in the county's 4.5-mile jurisdictional area and inside Billings. Fences must be located within the owner's lot lines; be no taller than 3 feet in the required front-yard setback and no taller than 6 feet elsewhere (over 6 feet must meet structure setbacks); and, at street corners, keep the clear-vision triangle free of anything over 30 inches. A Planning Department permit is required for fences 3 to 6 feet; a building permit and wind design are required over 7 feet. On unincorporated county parcels in no zoning district, the county imposes no fence requirements.
Fences that violate height, location or clear-vision rules may be ordered corrected or removed by City-County Planning; corner-vision obstructions are treated as safety hazards.
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Yellowstone County, MT
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