Hatfield, MA
Hatfield, MA Accessory Dwelling Unit (ADU) Rules
City Acceptance Rating: N/A (10 is most accepting)
What you need to know:
Hatfield does not allow detached accessory dwelling units (ADUs). Granny flats must be constructed within existing space or as an addition.
See the full text here: Zoning Ordinance Article 23 Accessory Apartments