MA H1572

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 a minimum height allowance of 2 stories

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

Creates a streamlined "Missing-Middle Housing Subdivision" process allowing lot divisions with 20-50 feet of frontage and maximum 10,000 square foot lots, approved ministerially within 60-90 days without public hearings

Mandates mixed-use or multifamily housing (minimum 15 units per acre) as of right within 0.5 miles of transit stations, with 15% of units affordable to households at 80% AMI or 10% at 50% AMI for developments of 10+ units; compliance required by January 1, 2027

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