The bill amends Sections 45-24-33 and 45-24-37 of the General Laws in Chapter 45-24, focusing on zoning ordinances. It introduces new requirements for these ordinances to address land use and development, including regulations on land and structures, performance standards for environmental quality, and energy conservation. A significant provision allows for the construction of attached single-family dwellings in designated zoning districts, defined as units built side by side with specific access to public or approved private water and sewer systems. These units can be located on their own lots without increased minimum lot size or other dimensional requirements, while still complying with building and fire codes. The bill also emphasizes development incentives, such as increased density in exchange for public benefits, and highlights the importance of transportation systems and public health in zoning decisions.

Furthermore, the bill introduces a new section, 45-24-37, which allows municipalities to set their own minimum lot sizes per zoning district and mandates that zoning ordinances list all permitted land uses and performance standards. It specifies that certain uses, including households and community residences, are permitted in all residential and most industrial and commercial districts, barring public health or safety exceptions. The bill also allows for the temporary placement of mobile and manufactured homes on properties made uninhabitable due to casualties, mandates reasonable accommodations for individuals with disabilities, and permits accessory dwelling units (ADUs) in all residential districts. The act is set to take effect on January 1, 2026.