Johnston updates code to allow accessory dwelling units in line with state law

The Johnston City Council gave first consideration to Ordinance 11-46, updating local code sections to conform with recent state legislation concerning accessory dwelling units (ADUs).

City planner Jacob summarized the changes, saying the law—identified in the meeting record as Senate File 592—requires cities and counties to allow at least one ADU on the same lot as a single-family residence and limits ADUs to a maximum of 1,000 square feet or 50% of the size of the primary residence. Jacob told the council local regulations cannot be more restrictive than those applied to single-family homes, and that ADU permits must be processed in the same manner as single-family permits.

Council members asked whether lot size would limit ADU eligibility; Jacob said lot size would not be a basis to deny an ADU but that setbacks and open-space requirements that apply to the primary structure still apply. Council moved and approved first consideration of the ordinance on a recorded vote.

The ordinance proceeds to additional readings before final adoption.