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H 1484

An Act relative to accessory dwelling units

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

Bill streamlines accessory dwelling unit creation in Massachusetts to increase housing supply by reducing local zoning and permitting barriers for secondary residential units.

Bill reported favorably by committee and referred to the committee on House Ways and Means
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Bill Summary · H 1484

Legislative bill overview

H 1484 addresses the regulations and permitting processes for accessory dwelling units (ADUs) in Massachusetts. The bill aims to streamline the creation of secondary residential units on single-family properties, which could increase housing supply in residential neighborhoods. The favorable committee report suggests momentum toward making ADU development more feasible across the state.

Why is this important

Massachusetts faces a significant housing shortage and affordability crisis, particularly in eastern regions. ADUs—such as in-law apartments or converted garages—represent an underutilized mechanism to increase housing density without large-scale development. Removing regulatory barriers could help homeowners generate rental income while providing more affordable units for renters.

Potential points of contention

  • Neighborhood character concerns: Residents in single-family neighborhoods may worry that legalizing ADUs will alter community character, increase traffic and parking pressures, and reduce property values
  • Municipal zoning authority: Local governments may resist state-level mandates that override local zoning controls, viewing it as an infringement on home rule authority
  • Infrastructure strain: Communities with limited water, sewer, and municipal services capacity may face service adequacy issues if ADU development expands without corresponding infrastructure investment

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

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