Sauk County, WI Fence Regulations: Height Limits (2026)
Key Facts
- Front yard fence
- 4 feet maximum for solid fences/walls
- Corner lot street side
- Also capped at 4 feet
- Vision triangle
- 30 inches if over 20% opaque
- Vision triangle absolute cap
- 2.5 feet, with limited exceptions
- Structure threshold
- Fences/walls over 6 feet need a permit
Summary
Sauk County Code § 7.100(3) caps solid fences and walls at four feet in a front yard or the street side yard of a corner lot, and at two and one-half feet inside a vision clearance triangle. A fence or wall taller than six feet is treated as a structure and must meet the county's ordinary setback and permit requirements.
(3)Fences and walls. Solid fences and walls may be located as follows:(a)Solid fences and walls greater than 20 percent opacity and located in a vision clearance triangle shall not exceed 30 inches in height.(b)Solid fences and walls more than six feet in height shall be considered structures, subject to the requirements of this ordinance.(c)Solid fences and walls shall not exceed four feet in height when located in a front yard or in a street side yard of a corner lot.(d)Solid fences and walls shall not exceed two and one-half feet in height when located within a vision clearance triangle, except retaining walls used to hold ground at or below its natural level and fences designed and constructed so as not to constitute a substantial obstruction to the view of motorists and pedestrians across the vision clearance opening from one street to another.
Full Breakdown
Sec. 7.100(3) sets three separate height caps for solid fences and walls, which the code defines by opacity greater than 20 percent. Anywhere in a front yard, or in the street side yard of a corner lot, a solid fence or wall cannot exceed four feet. Inside a vision clearance triangle, the same fence or wall is capped at 30 inches if it is more than 20 percent opaque, and any fence or wall in that triangle is capped further at two and one-half feet, except for low retaining walls and open, see-through fences designed so drivers and pedestrians can still see across the intersection.
Once a fence or wall passes six feet in height anywhere on the lot, Sec. 7.100(3)(b) reclassifies it as a structure, pulling it out of the fence exemption and into the ordinary Sec. 7.094 setback table and the Sec. 7.153 land use permit process that applies to any other building. Sec. 7.153(3) separately notes that a fence or wall more than six feet high and more than 50 percent opaque is treated as a structure for permit purposes even if it sits outside a setback area.
Sauk County's vision clearance triangle rule exists to keep sightlines open at every intersection of highways or roads with other highways or roads, as described in Sec. 7.098(5), and the fence height caps in Sec. 7.100(3) work alongside that road-setback provision rather than replacing it.
Violations & Fines
A fence or wall built taller than the four-foot front-yard cap, the 30-inch or two-and-one-half-foot vision-triangle caps, or the six-foot structure threshold without the required land use permit, is an unlawful structure under Sec. 7.155. The Zoning Administrator can order it removed or lowered, and the Corporation Counsel may seek an injunction; violators face a forfeiture of $50.00 to $200.00 per day the violation continues.
Frequently Asked Questions
How tall can my front yard fence be in unincorporated Sauk County?
What is a vision clearance triangle and how does it limit my fence?
Do I need a permit for a six-foot privacy fence?
Sources & Official References
Other rules in Sauk County
How Sauk County compares: Cities That Allow the Tallest Residential Fences·Compare Sauk County to another location·View the Wisconsin fence regulations overview
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