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Zoning commission debates when PC plan changes need review; staff seeks ADU guidance
Summary
Commissioners and staff discussed ambiguity in the county's PC plan-complex amendment process and reviewed a draft definition of accessory dwelling units, with staff seeking input and coordination with the health department and Iowa DNR on septic and water issues.
Commissioners and staff spent significant time discussing how the county's ordinance treats amendments to Planned Community (PC) plan complexes and reviewing an early draft definition for accessory dwelling units (ADUs).
Staff said the ordinance is vague about when an amended PC plan complex must return to the zoning commission and suggested the county may want to distinguish between 'minor modifications' that staff can administratively approve and major amendments that should come before the commission or the Board of Supervisors. "It's vague enough to where I don't know if the intent was to grant the zoning commission the sole ability to say, 'yeah, this looks good,'" staff told the commission. Commissioners debated whether changes that do not alter acreage or map boundaries but reshuffle uses should be handled administratively or heard publicly if the amendment could permit a change of use affecting neighbors.
On accessory dwelling units, staff described a working definition drawn from other counties: an ADU can be within the same building or on the same lot as the principal dwelling but should be separate (separate entrance, kitchen, bathroom and bedroom). "It needs to be separated by the wall, has its own entrance, has its own kitchen, bathroom, bedroom," staff said. Commissioners pressed staff to confirm whether tiny homes, travel trailers, or units using composting toilets could qualify; staff said ADUs intended as permanent dwellings must meet permanent-foundation and state/local building-code requirements and that the county is coordinating with the Iowa DNR and the county health department on wastewater/septic rules.
Staff also noted operational items: the Unified Development Code update remains on track for spring with a planned commission review in March or April, and staff are exploring an online permitting system used by other Iowa counties to streamline reviews. Staff asked for commissioner feedback on draft ADU language and said they will consult the health department about wastewater treatment capacity and whether shared wells or holding tanks present permitting obstacles.
Next steps: staff will refine draft ADU language after consulting Iowa DNR and county health officials and will return UDC materials for commission review per the planned timeline.
