ADU Requirements in Williamstown, MA
Berkshire County • Updated for 2024 MA ADU Law
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About ADUs in Williamstown, Massachusetts
Williamstown is located in Berkshire County, Massachusetts. Under the 2024 Affordable Homes Act, homeowners in Williamstown can now build accessory dwelling units (ADUs) up to 900 square feet by-right, meaning no special permit is required for compliant projects.
An ADU in Williamstown can be a detached backyard cottage, an attached addition, or a conversion of existing space like a basement or garage. These units are perfect for housing aging parents, adult children, or generating rental income.