MA S962

Requires municipalities to allow duplexes and multi-family housing (up to 5 units in areas with water/sewer, up to 3 units elsewhere) as of right on residential lots, with minimum 2-story height allowances and restrictions on short-term rentals

Prohibits local zoning from imposing minimum automobile parking requirements or minimum lot size requirements on new residential developments

Creates streamlined "Missing-Middle Housing Subdivision" approval process with 20-50 foot frontage requirements, maximum 10,000 square foot lots, and 60-90 day approval timelines

Mandates mixed-use or multifamily housing (minimum 15 units per acre) as of right within 0.5 miles of transit stations and 0.25 miles of eligible locations, with 15% affordable unit set-asides for developments of 10+ units; noncompliant regulations become void after January 1, 2027

Restricts local boards of health from adopting septic/sewage regulations exceeding state Title 5 requirements without DEP approval, and prohibits local wetland bylaws from exceeding state standards