MA H1516

Requires cities and towns to permit multifamily development by right in zoning districts covering at least 1.5% of developable land area, with minimum density of 20 dwelling units per acre

Mandates that cluster developments be permitted by right in residential zoning districts at existing density levels, subject to planning board review under subdivision control regulations

Eliminates the requirement to submit a standard subdivision plan as a condition for approving cluster development plans

Requires all single-family residential zoning districts to permit accessory dwelling units (ADUs) by right, prohibiting unreasonable regulation of ADU location, dimensions, or design

Defines multifamily housing as buildings with more than 3 apartment or condominium units, and ADUs as self-contained housing units subordinate to a single-family dwelling