ADU Requirements in Merrimac, MA

Merrimac is located in Essex County, Massachusetts. Under the 2024 Affordable Homes Act, homeowners in Merrimac 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 Merrimac 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.