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 and that new home construction could broaden the property tax base. Commissioners and members of the public pressed staff for more concrete comparative data on other counties’ approaches, on how existing county provisions (for example, the county’s accessory‑dwelling and second‑home clauses) would interact with any changes, and on expected implementation issues such as septic feasibility and road access.

Opponents cautioned that reducing minimum lot sizes could effectively permit spot rezones and increase pressure for parcel splits inside existing large agricultural sections. Several speakers said that lowering lot size minimums without a deliberate rezone or planned unit development (PUD) framework risks creating islands of higher density with inadequate infrastructure. Commissioners repeatedly raised the county’s limited sewer options in some lake and river valley areas and said septic failures in a wet year could present public‑health hazards.

A number of compromise options were discussed: (1) retain a flat 5‑acre eligibility but require lots to be sited at quarter‑section corners (to reduce interference with field operations); (2) adopt a parent‑parcel sliding scale that allocates building eligibilities proportionally to parcel size; (3) preserve existing conditional‑use pathways for hobby farms and accessory structures while clarifying whether those approvals transfer on rezones or sales.

Commissioners asked staff to supply comparative ordinance language and examples ahead of the next meeting. Staff also proposed separating the ordinance into discrete sections for review (for example, low‑density vs. ag‑zone rules) and bringing concrete recommended language to the public hearing the commission expects to schedule next month.

Votes at a glance

- Approval of minutes from previous meeting — motion seconded; roll‑call recorded as: Marco: yes; Lowest: yes; Kettering: yes; Hummel: yes; Welsh: yes; Clark: yes. Outcome: approved.

- Plat (Lacroix / Bed & Biscuit strip addition) — motion to approve; second recorded; roll call: Marco: yes; Lowest: yes; Kettering: yes; Hummel: yes; Welsh: yes; Clark: yes. Outcome: approved.

- ETJ plat (small triangular lot near Highway 50 for storage/drive‑up units) — motion to approve; seconded; roll call: Marco: yes; Lowest: yes; Kettering: yes; Hummel: yes; Welsh: yes; Clark: yes. Outcome: approved.

- Zimmerman conditional use permit (accessory building exceeding aggregate accessory square footage limits) — motion to approve; seconded; roll call: Marco: yes; Lowest: yes; Kettering: yes; Hummel: yes; Welsh: yes; Clark: yes. Outcome: approved. Clarifying detail in staff report: applicant requested a 900‑square‑foot accessory building where the parcel already had accessory area exceeding the 2,400‑square‑foot aggregate limit (staff cited the existing total as over 2,400 square feet; transcript also referenced 8,500 square feet in the property description).

- Conditional use permit for seasonal fireworks sales at Lot 1, Houston’s Addition (former Lucan/Lucan Arts building site) — motion to approve; seconded; roll call: Marco: yes; Lowest: yes; Kettering: yes; Hummel: yes; Welsh: yes; Clark: yes. Outcome: approved.

What commissioners asked staff to do next

Commissioners agreed to request comparative language and zoning examples from staff before the next meeting and to consider holding an additional discussion round focused on low‑density residential (R‑1/R‑2) distinctions, hobby‑farm conditional uses, and thresholds for accessory structures. Staff was asked to compile examples of neighboring counties’ approaches, cost/feasibility notes about septic and road access, and draft ordinance language sections for the upcoming public hearing.

Why this matters

If adopted, the proposed changes could increase the number of eligible rural home sites across large portions of the county and alter how agricultural land is protected and taxed. Commissioners emphasized the tradeoffs: potential short‑term gain in housing supply and tax revenue versus long‑term impacts on farm operations, rural infrastructure demand, and public‑health risks in low‑service areas. The commission scheduled further review and will forward any formal recommendation to the County Commission after its hearing process.