Land use: zoning and growth management; zoning restrictions related to accessory dwelling units and mobile homes; modify. Amends sec. 102 of 2006 PA 110 (MCL 125.3102) & adds secs. 207a & 516.

HB 5585 modifies Michigan's zoning laws to make it easier to add secondary housing units and mobile homes. It prohibits local zoning rules from implicitly excluding mobile homes based on aesthetics or materials not tied to public safety, directly affecting mobile home residents and developers. For accessory dwelling units (ADUs) - secondary housing units like backyard cottages - the bill automatically allows them in residential zones if they meet size limits (max 800 sq ft or 75% of the main house), maintain 5-foot setbacks, and are attached to or near an existing single-family home. ADUs under these rules no longer require public hearings or discretionary approval, and they do not count toward local density limits.