This ordinance, relating to land use and zoning, expands housing options by easing barriers to the construction and use of accessory dwelling units (ADUs) as required by state legislation. It amends various sections of the Seattle Municipal Code, repeals others, and adds new sections (23.42.022 and 23.53.003). The legislation updates ADU provisions, including allowing up to two ADUs per lot with a principal dwelling unit, and updates standards for height limits, parking, and street improvements. It also clarifies provisions related to condominium ownership of ADUs. The aim is to comply with Washington State House Bill 1337, promoting more diverse housing options and addressing housing capacity, affordability, and displacement.