The bill amends various sections of the General Laws related to land use and zoning, specifically targeting the subdivision of land and the establishment of clearer design requirements for residential developments. Key insertions include the requirement for local regulations to specify objective standards for subdivisions, allowing municipalities to set their own minimum lot sizes while ensuring compliance with updated standards for attached single-family dwellings. The bill mandates that wetland buffers be included in the calculation of minimum lot area, reinforcing environmental protections. Additionally, it introduces a new section that requires zoning ordinances to comprehensively list all permitted land uses and performance standards, while updating definitions for terms such as "attached single-family dwelling" and "adaptive reuse" to enhance clarity and consistency in local ordinances.

Furthermore, the bill allows for the operation of community transitional residences, accommodating a limited number of individuals or families in need of temporary support, and emphasizes the importance of access to common areas and social services. It streamlines existing definitions and provisions, deleting outdated language to modernize zoning regulations and improve understanding. The legislation also mandates that municipalities permit attached single-family dwellings in all residential zoning districts, with specific criteria for compliance, and requires the Department of Housing to provide guidance on model ordinances. Overall, the bill aims to enhance housing options, promote flexibility in land use, and ensure that local regulations align with state standards while maintaining a balance between development and environmental considerations.