Local-control model. Each town's Board of Health can be more or less restrictive.
Sources
Where to verify Massachusetts's rules
Statute / regulation
mass.gov/regulations/105-CMR-59000-state-sanitary-code-chapter-x
Massachusetts Department of Public Health
mass.gov/info-details/residential-kitchen-permit-information
Forrager state guide
forrager.com/law/massachusetts/
Cooperative Extension
ag.umass.edu/sites/ag.umass.edu/files/fact-sheets/pdf/cottage_food_law_basics_-_august_2018_revision.pdf
By Locality
Massachusetts Counties
12 counties tracked. Pick yours for the local zoning + health department links.
Major cities
City zoning rules in Massachusetts
City zoning rules apply on top of the state cottage food law — home occupation, customer pickup, signage, and employees.
Boston
American Legal Publishing
Important
Cottage food laws are amended every year. This is a starting reference, not legal advice. Verify with Massachusetts Department of Public Health and your local health department before relying on this data.