Yankton County planners debate smaller rural lot sizes, farmer protections

At a meeting of the Yankton County Planning and Zoning Commission, members spent the bulk of the session debating proposed changes to county zoning rules that would allow additional residential building eligibilities on quarter sections and reduce minimum lot sizes in some rural residential districts.

Supporters framed the draft changes as a way to increase housing supply and county tax revenue while keeping large tracts of agricultural land intact; critics said the same changes could erode protections for ongoing farming operations, complicate spraying and other farm practices, and create sanitation and road‑service problems in higher‑density rural pockets.

The commission discussed multiple drafting options: a straight 5‑acre eligibility for new rural building sites, placing new lots at quarter‑section corners to preserve farming operations inside a section, and a “sliding scale” or parent‑parcel approach that limits subdivision based on the size of the parent tract. Commissioners and staff compared local practice with other southeast South Dakota counties, noting different thresholds in neighboring jurisdictions (Minnehaha: 1 acre eligibility in some programs; Lincoln: 1 acre; Turner and Clay: 2–2.5 acres; Hutchinson: 20 acres with conditional reductions).

Planning staff described the county’s fiscal position as a driver for the discussion, saying general fund balances had dropped in recent years…