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

HF 947 requires Iowa counties and cities to allow at least one accessory dwelling unit (ADU) on single-family residential lots. It sets size limits (max 1,000 sq ft or 50% of the main home's size), prohibits local rules that are stricter for ADUs than for main homes (like extra parking fees, design matching requirements, or occupancy restrictions based on income or age), and mandates automatic permit approval for compliant ADU applications. The bill also clarifies that ADUs using manufactured homes must be converted to real property with permanent foundations. This directly affects homeowners seeking to build ADUs and local governments responsible for zoning and permitting.