MN SF4123

Requires municipalities with 5,000+ population (1,000+ in metro area) to allow mixed housing (duplexes, triplexes, fourplexes, townhouses) as permitted use on at least 33% of land zoned for single-family housing, effective January 1, 2028

Mandates all municipalities allow at least one accessory dwelling unit on any residential lot with a single-family home, regardless of lot size or street frontage

Requires multifamily residential developments be permitted in at least 33% of commercially zoned districts, with height limits matching existing tallest buildings in the district

Prohibits municipalities from imposing certain residential design standards on buildings with 4 or fewer units, including minimum exterior materials, garage sizes, roof pitch exceeding 4:12, and minimum window requirements

Limits minimum lot sizes to one-eighth acre for greenfield lots and 1,500 square feet for townhouses, and prohibits bulk requirements that prevent construction of at least 1,500 square feet of habitable space per unit