Laserfiche WebLink
115.07 Accessory Dwelling Units (City of Kirkland Washington) <br />One (1) accessory dwelling unit (ADU) is permitted as subordinate to a single-family dwelling; provided, that the <br />following criteria are met: <br />1. Number of Occupants – The total number of occupants in the principal dwelling unit and the ADU <br />combined shall not exceed the maximum number established for a single-family dwelling as defined in <br />KZC 5.10.300. <br />2. Owner Occupancy – One (1) of the units must be the principal residence of the property owner(s). <br />3. Subdivision – Accessory dwelling units shall not be subdivided or otherwise segregated in ownership from <br />the principal dwelling unit. <br />4. Scale – <br />a. Attached ADU: The square footage of the accessory dwelling unit shall not exceed 40 percent of the <br />primary residence and accessory dwelling unit combined. If the accessory unit is completely located on a <br />single floor, the Planning Director may allow increased size in order to efficiently use all floor area. <br />Garages, sheds and outbuildings are excluded from the square footage calculation for the primary <br />residence and the ADU. <br />b. Detached ADU: <br />1) An accessory dwelling unit will be considered to be “detached” from the principal unit if it has <br />any of the following characteristics: <br />a) It does not share a common roof structure with the principal unit. <br />b) It is not integrated into the footprint of the principal unit. <br />c) The design is inconsistent with the existing roof pitch, siding treatment, and window style <br />of the principal unit. <br />2) The square footage of the detached ADU shall not exceed the lesser of 800 square feet of <br />gross floor area or 40 percent of the primary residence and accessory unit combined. Garages, <br />sheds and outbuildings are excluded from the square footage calculation for the primary residence <br />and the ADU. When calculating the square footage of the ADU see KZC 5.10.340, definition of <br />“gross floor area.” The gross floor area shall not include: <br />a) Area with less than five (5) feet of ceiling height, as measured between the finished floor <br />and the supporting members for the roof. <br />b) Covered exterior elements such as decks and porches; provided, the total size of all <br />such covered exterior elements does not exceed 200 square feet. See KZC 115.08 for <br />additional size and height limitations. <br />5. Location. The accessory dwelling unit may be added to or included within the principal unit, or located in a <br />detached structure. Detached structures must conform with the setbacks, height restrictions, lot coverage and <br />other applicable zoning regulations required for single-family dwellings in the applicable use zone; provided, <br />that an accessory dwelling unit shall not be considered a “dwelling unit” in the context of Special Regulations in <br />Chapters 15 through 60 KZC which limit the number of detached dwelling units on each lot to one (1). <br />6. Entrances. The primary entrance to the accessory dwelling unit shall be located in such a manner as to be <br />clearly secondary to the main entrance to the principal unit and shall not detract from or alter the single-family <br />character of the principal unit.