974 CMR, § 5.05
Current through Register 1538, January 3, 2025
Accessory apartments are permitted in single family dwellings. Accessory apartments may be located in the same structure as the principal dwelling or in combination with space for a permitted home occupation or business, a garage, or other allowed accessory use, or as a separate structure itself, provided that the total gross square feet of the accessory apartment, whether within the same structure or a separate one, is limited to 25% of the floor area of the principal dwelling. Dwellings with accessory apartments shall retain the appearance of single-family dwellings. An accessory apartment within the dwelling is a Level One permit, an accessory apartment in a detached structure is a Level Two permit.
974 CMR, § 5.05