What is an ADU by MLS definition for input into the listing details?
Any space or structure that meets with Massachusetts and local code to be classified as an ADU. An ADU must:
- Maintain a separate entrance, either directly from the outside or through an entry hall or corridor shared with the principal dwelling sufficient to meet the requirements of the state building code for safe egress;
- Be either no larger than half the gross floor area of the principal dwelling or 900 square feet, whichever is smaller;
- Meet local municipal restrictions, including, but not limited to, additional size restrictions and/or restrictions or prohibitions on short-term rental if the city or town decides to impose these
More details: https://www.mass.gov/info-details/accessory-dwelling-units and also check with the town that it is located.