ADU rules in Worcester, MA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Worcester allows ADUs on properties with existing single-, two-, or three-family dwellings as of January 2024. ADUs are limited to 900 square feet. Massachusetts law now allows ADUs by right statewide.
Worcester adopted ADU zoning provisions effective January 9, 2024, and Massachusetts further expanded ADU rights through the 2024 Affordable Homes Act. ADUs are limited to 900 square feet in Worcester. They are allowed on all properties with one lawfully existing single-, two-, or three-family residential dwelling. A maximum of one ADU per property is permitted. ADUs cannot be in the front yard. If added to the side of an existing building, the ADU must be set back 5 feet from the front elevation of the main building. Massachusetts law now allows ADUs by right as a single-family use, limiting municipalities' ability to restrict them. Building permits are required, and ADUs must meet all building code requirements for habitable spaces. The city continues to update its ADU regulations — proposed amendments were on the May 2025 City Council agenda.
Unpermitted ADU: fines and potential removal order. Non-compliant ADUs must be brought to code.
Worcester, MA
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Worcester, MA
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Worcester, MA
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Worcester, MA
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Worcester, MA
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Worcester, MA
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Side-by-side rule comparisons with other cities in Worcester County.
See how other cities in Worcester County handle adu rules.
See how Worcester's adu rules rules stack up against other locations.
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