The Oregon State Senate recently approved House Bill 2001, which would authorize missing middle housing in large cities’ single-family zones, advancing it to Governor Kate Brown’s desk for her signature. This legislation would end bans on duplexes for every low-density residential lot in all cities with more than 10,000 residents and all urban lots in the Portland metro area. In cities of more than 25,000 and within the Portland metro area, the measure would authorize duplexes, triplexes, fourplexes, attached townhomes and cottage clusters on some lots in all areas zoned for residential use. If signed by Governor Brown, Oregon would be the first state to pass state-wide legislation that aims to address single-family zoning.