Land Use & Zoning

In Massachusetts, an 'accessory dwelling unit' (ADU) or 'in-law apartment' in a single-family zone typically requires:

AA variance from the Board of Appeals
BCompliance with local zoning bylaws which may allow ADUs by right under recent state legislation✓ Correct
CState approval from the Executive Office of Housing
DConversion of the entire property to two-family zoning

Explanation

Massachusetts recently enacted legislation (effective February 2025) requiring municipalities to allow ADUs by right in single-family zones, subject to reasonable dimensional requirements. This overrides local zoning restrictions that previously limited ADU development.

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