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Homeowner Resources for Planning an Accessory Dwelling Unit

Stand alone accessory dwelling unitAre you thinking about building an Accessory Dwelling Unit (ADU) on your property?

Per the Commonwealth of Massachusetts Section 8 of Chapter 150 of Acts of 2024, ADUs may be constructed by-right in residentially zoned areas. They may be up to 900 square feet or 50% of the gross floor area of your home, whichever is less. For more information from the Commonwealth of Massachusetts: https://www.mass.gov/info-details/accessory-dwelling-units

ADUs may be added as: 

  • Stand-alone structures
  • Above or in a garage
  • In a basement space
  • As an addition to an existing home 

Please use the menu at the right side of this page to look at a number of important ADU topic.

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