Single-family residential use; middle housing allowed on lots zoned for units.

Middle housing allowed on lots zoned for single-familyuse. Requires all localities to allow development or redevelopmentof "middle housing" residential units upon each lot zoned for single-familyresidential use. Middle housing is defined as two-family residentialunits, including duplexes, townhouses, cottages, and any similarstructure. Such structures shall not require a special use permitor be subjected to any other local requirements beyond those imposedupon other authorized residential uses. Localities may regulate the siting, design, and environmental standards of middle housing residential units, including setback requirements, provided that the regulationsdo not, individually or cumulatively, discourage the developmentof all two-family housing types permitted through unreasonable costsor delay.