Swampscott, MA

Attached ADU, Convert Existing Space, Detached ADUChris LeeJuly 9, 2024Greater Boston, Swampscott, Massachusetts, Friendliness Score 8/10

Arlington, MA

Convert Existing Space, Attached ADU, Detached ADUChris LeeJuly 9, 2024Greater Boston, Arlington, Massachusetts, Friendliness Score 8/10

Lancaster, MA

Attached ADU, Convert Existing Space, Detached ADUChris LeeApril 25, 2024Friendliness Score N/A, Lancaster, Massachusetts, Western MA

Medway, MA

Convert Existing Space, Attached ADU, Detached ADUGuest UserFebruary 18, 2022Friendliness Score N/A, Medway, Massachusetts, Greater Boston

Lexington, MA

Attached ADU, Convert Existing Space, Detached ADUGuest UserFebruary 18, 2022Greater Boston, Friendliness Score: 7/10, Massachusetts, Lexington

Cambridge, MA

Attached ADU, Convert Existing Space, Detached ADUGuest UserFebruary 17, 2022Greater Boston, Friendliness score 10/10, Cambridge, Massachusetts

Lincoln, MA

Attached ADU, Convert Existing SpaceGuest UserFebruary 17, 2022Greater Boston, Friendliness score 10/10, Lincoln, Massachusetts

Newton, MA

Attached ADU, Convert Existing SpaceGuest UserFebruary 17, 2022Greater Boston, Friendliness score 10/10, Newton, Massachusetts

Concord, MA

Concord, MA allows ADUs up to 750 sq. ft. by right.

Williamsburg, MA

Williamsburg does not allow detached accessory dwelling units (ADUs). Granny flats must be constructed within existing space or as an addition.

Sandwich, MA

Sandwich draws a distinction between “Accessory Dwelling Units” and “Accessory Apartments” and provide different rules for each.

Provincetown, MA

Provincetown allows property owners to build new attached and detached dwelling units by right in all zoning districts except S (Seashore) and M (Public Use) districts.

Mashpee, MA

Attached ADU, Convert Existing Space, Detached ADUGuest UserSeptember 11, 2020Cape Cod, Friendliness score 10/10, Massachusetts, Mashpee

Orleans, MA

Orleans currently has restrictive rules associated with adding an ADU to a single family lot. The town does not allow additions or new construction unless it will have a minimal impact on the existing footprint of the existing structures.