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18.101.110 <br />(Pleasanton Supp. No. 27, 1-22) 664f <br />E. If a housing development unit is located in the side or rear yard otherwise established for the zoning district by <br />Chapter 18.84 of this title, the maximum height of the portion of a housing development unit located between the <br />four-foot setback line established by this chapter and the limit of the rear, side, or street side yard area established <br />by Chapter 18.84 of this title is 15 feet, as measured from the lowest grade adjacent to the structure to the highest <br />ridge or top of the structure, including parapet. If the housing development unit is proposed entirely outside of the <br />rear, side, or street side yard area as established by the zoning district in Chapter 18.84 of this title, the maximum <br />height of the housing development unit shall be the same as that established by the zoning district, and measured <br />as specified in Chapter 18.84 of this title for primary structures. <br />F. Housing development units on the same parcel shall be cumulatively limited to the floor area allowed by the resi- <br />dential zoning district that the parcel is located. In the instance where the floor area limitation results in a unit less <br />than 800 square feet, the floor area limit may be exceeded but only to allow a unit up to 800 square feet. <br />G. The upper stories of housing development units shall be separated from any structure on adjacent parcels by the <br />following standards: <br />1. Where both the housing development unit and the structure on the adjacent property is two or more stories, <br />a minimum separation of 20 feet shall be provided between the upper stories of the housing development <br />unit and the upper stories of the structure on the adjacent property. <br />2. Where only the housing development unit is two or more stories and the structure on the adjacent parcel is <br />one story, a minimum separation of 17 feet shall be provided between the upper stories of the housing de- <br />velopment unit and structure on the adjacent property. <br />For purposes of this section, separation shall be measured from the wall of one structure to the wall of the other <br />structure excluding architectural projections. <br />H. Housing development units shall be separated from accessory structures on the same parcel, parcels resulting <br />from an urban lot split, or adjacent parcels by a minimum of six feet, except that the distance between a main <br />structure and an accessory structure shall be allowed to be closer than six feet if all of the following conditions <br />are met: <br />1. These separation requirements would cause the housing development unit to conflict with the minimum <br />setbacks or unit size otherwise allowed by this chapter. <br />2. All of the requirements of the building and fire codes are met. <br />3. If accessory structures are not located closer than three feet to any side or rear property line. <br />I. The floor area of the upper stories of housing development units shall be limited to 40 percent of the floor area on <br />the first floor. <br />J. Housing development units shall meet the following standards for roof forms and detailing: <br />1. New structures shall provide a roof sloped to a minimum of 3:12 inches. <br />a. A sloped roof shall be defined as a gable, hip, cross gable roof, or any combination thereof. Mansard <br />roofs shall be prohibited. <br />b. Sloped roofs shall be allowed to be designed for habitable use provided that they comply with floor <br />area maximums. <br />c. Roofs for housing development units that result from alteration or addition to an existing main struc- <br />ture shall match the existing slope, form, and materials of the main structure. <br />2. Roof material and color shall be consistent throughout the entirety of the roof within each new or modified <br />building that is part of the housing development unit. Metal roll and standing seam roofing shall be prohib- <br />ited, except where their use is documented on existing adjacent structures. <br />3. Roofs shall be detailed with projecting eaves and gable rakes. These overhanging elements shall project a <br />minimum of 12 inches from the face of the adjacent building wall. <br />4. A minimum of 25 percent of roof area shall be articulated with any combination of hip, gable, or shed dor- <br />mers.