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Walworth County, WI Right to Farm: Agricultural Zoning Protection (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

District
A-1 Prime Agricultural Land District, § 74-51
Minimum farm lot
35 acres minimum, 300-foot minimum width
Soil basis
Class I, II, III soils under Wis. Stats. ch. 91
Extra farm residence
One additional residence per 35 acres, conditional use
Penalty
$100-$1,000 forfeiture per violation plus costs

Summary

Walworth County's A-1 Prime Agricultural Land District is a Farmland Preservation District built to keep highly productive farmland in food and fiber production. Section 74-51 declares agriculture the highest and best use of A-1 land and requires every structure and improvement to stay consistent with agricultural use, limiting non-farm encroachment across the unincorporated towns.

These county ordinances apply to unincorporated areas of Walworth County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

A-1 Prime agricultural land district. ... A Farmland Preservation District. The primary purpose of this district is to maintain highly productive exclusive agricultural lands in food and fiber production by effectively limiting encroachment of non-agricultural development and minimizing land use conflicts among incompatible uses. ... As a matter of policy, it is hereby determined that the highest and best use of these lands is agriculture. All structures and improvements must be consistent with agricultural use. (Wis. Stats. ch. 91)

Full Breakdown

Section 74-51 of the Walworth County Code establishes the A-1 Prime Agricultural Land District as a Farmland Preservation District whose purpose is to maintain highly productive exclusive agricultural lands in food and fiber production by effectively limiting encroachment of non-agricultural development and minimizing land use conflicts among incompatible uses. S. Natural Resource Conservation Service and identified in the county farmland preservation plan under Wis. ch. 91. Principal uses permitted outright include farm residences, dairying, grazing, livestock raising, orchards, plant nurseries and Christmas tree production, poultry raising, crop and forage production, sod farming, vegetable raising, viticulture, apiculture, and enrolling land in a federal or state agricultural conservation payment program.

Conditional uses reviewed under § 74-61, such as additional farm residences beyond one per 35 acres, veterinarian facilities for livestock, livestock sales facilities, and a farm family business limited to two non-family employees, must be found consistent with the farmland preservation district's purpose, reasonable given alternative locations, and structured to minimize conversion of agricultural land and any impairment of surrounding protected farmland. The County Zoning Agency views the site and weighs testimony at a public hearing before approving any conditional use in the district. Because the ordinance ties all structures and improvements to agricultural use, a landowner cannot introduce commercial or residential development in A-1 without first securing a conditional use permit or rezoning, and violations are enforced the same way as the rest of chapter 74. The area table for A-1 sets a minimum farm lot size of 35 acres with a minimum width of 300 feet.

Violations & Fines

A structure or use in the A-1 district that is not consistent with agricultural use, or a conditional use operated outside its approved conditions, violates chapter 74 and is subject to § 74-47's forfeiture of $100 to $1,000 per violation plus costs, with up to 30 days in jail for nonpayment and each continuing day treated as a separate offense enforceable as a public nuisance.

Frequently Asked Questions

What is the A-1 district in Walworth County?
It is the county's Prime Agricultural Land District, a Farmland Preservation District created under § 74-51 to keep Class I, II, and III soils in food and fiber production. The ordinance declares agriculture the highest and best use of A-1 land and requires all structures and improvements to remain consistent with agricultural use.
Can I build a second house on my A-1 farm?
Only as a conditional use. Section 74-51 caps additional farm residences at one per 35 acres of A-1 land, and § 74-61 requires the County Zoning Agency to find that the extra residence will not convert prime farmland or impair the current or future agricultural use of surrounding protected farmland before approving it.
What is the minimum lot size in the A-1 district?
Section 74-51's area, height and yard table sets a minimum farm lot size of 35 acres with a minimum width of 300 feet in the A-1 Prime Agricultural Land District, reflecting the district's purpose of keeping large, contiguous tracts in active agricultural production rather than being split into smaller non-farm parcels.

Sources & Official References

Other rules in Walworth County

All Walworth County rules

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