relative to zoning restrictions on dwelling units.

HB 457 modifies zoning laws to reduce restrictions on multi-unit dwelling structures in areas previously limited to single-family homes. It directly affects homeowners, developers, and local municipalities by permitting duplexes, triplexes, and accessory dwelling units (ADUs) in zones that previously banned them. The key provision requires local governments to allow these housing types without requiring special permits or rezoning applications. This policy change aims to increase housing options in communities by expanding allowable residential structures within existing zoning categories. The bill became law on July 22, 2025, and takes effect September 13, 2025.