Definitions. For purposes of this Section 8.3, the following definitions shall apply:
ACCESSORY DWELLING UNIT (ADU)
A self-contained housing unit, inclusive of sleeping, cooking and sanitary facilities on the same Lot as a Principal Dwelling, subject to otherwise applicable dimensional and parking requirements, that: (i) maintains 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; and (ii) except as provided for herein, is not larger in Gross Floor Area than 1/2 the Gross Floor Area of the Principal Dwelling or 900 square feet, whichever is less.
DWELLING UNIT
A single housing unit providing complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking, and sanitation.
GROSS FLOOR AREA (GFA)
The sum of the areas of all stories of the building of compliant ceiling height pursuant to the state building code, including basements, lofts, and intermediate floored tiers, measured from the interior faces of exterior walls or from the centerline of walls separating buildings or dwelling units but excluding crawl spaces, garage parking areas, attics, enclosed porches, and similar spaces. Where there are multiple Principal Dwellings on the Lot, the GFA of the largest Principal Dwelling shall be used for determining the maximum size of a Protected Use Accessory Dwelling Unit.
LOT
An area of land with definite boundaries that is used, or available for use, as the site of a structure, or structures, regardless of whether the site conforms to requirements of zoning.
MODULAR DWELLING UNIT
A pre-designed Dwelling Unit assembled and equipped with internal plumbing, electrical or similar systems, prior to movement to the site where such Dwelling Unit is affixed to a foundation and connected to external utilities; or any portable structure with walls, a floor, and a roof, designed or used as a Dwelling Unit, transportable in one or more sections and affixed to a foundation and connected to external utilities.
PRINCIPAL DWELLING
A structure, regardless of whether it conforms to zoning, including use requirements and dimensional requirements, such as setbacks, bulk, and height, that contains at least one Dwelling Unit and is located on the same Lot as a Protected Use Accessory Dwelling Unit.
PROTECTED USE ACCESSORY DWELLING UNIT (PADU)
An attached or detached ADU that is located, or is proposed to be located, on a Lot in a Single-Family Residential Zoning District and is protected by MGL. c. 40A, § 3, provided that only one ADU on a Lot may qualify as a Protected Use Accessory Dwelling Unit. An ADU that is nonconforming to Zoning shall still qualify as a Protected Use Accessory Dwelling Unit if it otherwise meets this definition.
SHORT-TERM RENTAL
Short-term rental, as defined as MGL c. 64G, § 1. Any unit rented for 31 days or less to any one individual renter/tenant shall be deemed a short-term rental.
SINGLE-FAMILY RESIDENTIAL DWELLING
A structure on a Lot containing not more than one Dwelling Unit.
SINGLE-FAMILY RESIDENTIAL ZONING DISTRICT
Any zoning district where Single-Family Residential Dwellings are a permitted or an allowable use, including any zoning district where Single-Family Residential Dwellings are allowable as-of-right or by Special Permit.
TRANSIT STATION
A subway station, commuter rail station, ferry terminal or bus station.