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HD 3172

An Act relative to accessory dwelling units

194th Legislature (2025-2026) Introduced by Mark Cusack

Massachusetts bill to streamline accessory dwelling unit creation by reducing zoning barriers and permitting requirements to expand housing supply in residential areas.

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Bill Summary · HD 3172

Legislative bill overview

HD 3172 would modify Massachusetts law to facilitate the creation of accessory dwelling units (ADUs)—smaller, independent housing units on residential properties alongside primary homes. The bill aims to streamline zoning regulations and permitting processes that currently restrict ADU development across the state.

Why is this important

ADUs are considered a potential solution to Massachusetts' housing shortage and affordability crisis by allowing property owners to create additional rental or owner-occupied units without requiring new land development. Removing regulatory barriers could increase the housing supply in existing neighborhoods while generating income for homeowners.

Potential points of contention

  • Local control concerns: Municipalities may resist state-level mandates that override local zoning authority, which has traditionally governed residential land use decisions
  • Neighborhood character: Residents in single-family neighborhoods may oppose increased density, citing concerns about parking, traffic, and community character preservation
  • Affordable housing guarantees: The bill's effectiveness depends on whether created units remain affordable or simply provide market-rate rentals that benefit property owners while not addressing affordability for low-income residents

Compiled from official sources — confirm details with the bill’s official record.

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