A bill for an act relating to county and city regulation of accessory dwelling units.

This bill requires Iowa counties and cities to allow at least one accessory dwelling unit (ADU) per single-family residential lot. It prohibits local governments from imposing restrictions that are more stringent than those for primary homes, such as size limits below 1,000 sq. ft (except capping ADU size relative to the main house), extra parking requirements, or discriminatory occupancy rules. Counties and cities must approve ADU permit applications meeting state standards within 30 days, or the application is deemed approved. The bill directly affects local governments (through regulatory changes) and homeowners seeking to build or rent ADUs on their property.