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Three alternative definitions of ADUs are presented with the numeral 111:1 Choose one of the following options: <br />Limiting ADUs to parcels that are already the site of a single-family dwelling <br />1. G°Accessory Dwelling Unit" (ADU) means a residential living unit on the same parcel as a single-family <br />dwelling. The ADU provides complete independent living facilities for one or more persons. It may take <br />various forms: a detached unit; a unit that is part of an accessory structure, such as a detached garage; <br />or a unit that is part of an expanded or remodeled dwelling. <br />The ADU to be built before or concurrently with a single-family home <br />1. "Accessory Dwelling Unit" (ADU) means a residential living unit on the same parcel as a single-family <br />dwelling or a parcel on which a single-family dwelling is present or may be constructed. The ADU provides <br />complete independent living facilities for one or more persons. It may take various forms: a detached unit, <br />a unit that is part of an accessory structure, such as a detached garage; or a unit that is part of an expanded <br />or remodeled dwelling. <br />The preceding definition allows for the construction of an ADU prior to or concurrent with that of the primary <br />residence. Two common circumstances in which an ADU might be built before the primary residence are (1) when a <br />homeowner wishes to stage construction expenses and living arrangements, and (2) when the homeowner owns an <br />adjacent legal lot (typically used as a side or backyard) and prefers to site an ADU there rather than on the lot with <br />the primary residence. Suppose an owner built a 600 square foot detached dwelling on hersecond lot to serve as an <br />ADU. If that lot was separately sold and the home on it was not identified as an ADU, the new owner might find <br />that regulations limiting the size of ADUs to 75% of the primary dwelling's size would treat the small home as the <br />primary residence and limit the size of an official ADU to 400 square feet. <br />The ADU to be created on a lot with a multifamily dwelling <br />1. "Accessory Dwelling Unit" (ADU) means a residential living unit on the same parcel as a single-family <br />dwelling or a multifamily structure. The ADU provides complete independent living facilities for one or more <br />persons. It may take various forms: a detached unit; a unit that is part of an accessory structure, such as a <br />detached garage; or a unit that is part of an expanded or remodeled single-family unit or a unit in a multifamily <br />dwelling. <br />2. "Junior Accessory Dwelling Unit" (JADU) is a separate living unit of less than 500 square feet, with a separate <br />entrance, that may share sanitation facilities with another dwelling unit other than an ADU. <br />The provision on junior accessory dwelling units is based on California's definition and authorization of this type <br />ofADU. See California Government Code Section § 65852.22. <br />3. "Living Area" means the interior habitable area of a dwelling unit, including basements and attics, but does <br />not include a garage or any accessory structure. <br />4. "Zoning Administrator" means the local official who is responsible for processing and approving or denying <br />applications to develop or legalize ADUs. <br />32 1 AARP - Accessory Dwelling Units: Model State Act and Local Ordinance <br />