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SEC. 133. SIDE YARDS, RH-1(D) DISTRICTS. (See Interpretations related to this Section.) The following requirements for side yards shall apply to every building in an RH-1(D) District. Any lot width of less than 33 feet as described herein shall refer only to substandard lots of record as defined in Section 180 of this Code. (a) Minimum side yards shall be provided as follows: (1) For lots with a width of less than 28 feet: none; (2) For lots with a width of 28 feet or more but less than 31 feet: one side yard equal to the amount by which the lot width exceeds 25 feet, or the same total amount in the form of two side yards, one of which shall be at least three feet; (3) For lots with a width of 31 feet or more but less than 40 feet: two side yards each of three feet; (4) For lots with a width of 40 feet or more but less than 50 feet: two side yards each of four feet; (5) For lots with a width of 50 feet or more: two side yards each of five feet.

(b) Where, however, the building does not exceed 25 feet in height, any side yard required by Subsection (a) to be more than three feet in width may be reduced to three feet if the width of the other side yard is increased by the same amount as the first one is reduced. (c) Buildings may be built to the common line of two adjoining lots if a side yard having a width of not less than the combined width of the two side yards required above for each lot is provided on each such lot on the opposite side. (d) Only those obstructions specified in Section 136 of this Code shall be permitted in a required side yard, and no other obstruction shall be constructed, placed or maintained within any such yard. No motor vehicle, trailer, boat or other vehicle shall be parked or stored within any such yard, except as specified in Section 136. (Amended by Ord. 443-78, App. 10/6/78) SEC. 134. REAR YARDS IN R, RC, RTO, NC, M, CMUO, MUG, MUO, MUR, RED, RED-MX, SPD, UMU, AND WMUG DISTRICTS; AND LOT COVERAGE REQUIREMENTS IN C DISTRICTS. (See Interpretations related to this Section.) (a) Purpose. The rear yard requirements of this Section 134 are intended to: (1) assure the protection and continuation of established mid-block landscaped open spaces; (2) maintain a scale of development appropriate to each district, complementary to the location of adjacent buildings; (3) provide natural light and natural ventilation to residences, work spaces, and adjacent rear yards; and (4) provide residents with usable open space and views into green rear-yard spaces. (b) Applicability. The rear yard requirements established by this Section 134 shall apply to every building in the districts listed below. To the extent that these provisions are inconsistent with any Special Use District or Residential Character District, the provisions of the Special Use District or Residential Character District shall apply. (c) Basic Requirements. The basic rear yard requirements shall be as follows for the districts indicated: (1) In RH, RM-1, RM-2, RTO-1, and RTO-M Zoning Districts, the basic rear yard shall be equal to 30% of the total depth of the lot on which the building is situated, but in no case less than 15 feet. (2) In all other Zoning Districts not listed in subsection (c)(1), the rear yard shall be equal to 25% of the total depth of the lot on which the building is situated, but in no case less than 15 feet. (d) Rear Yard Location Requirements. (1) RH, RM, RTO-1, RTO-M, NC-1, NCT-1, Inner Sunset, Outer Clement Street, Cole Valley, Haight Street, Lakeside Village, Sacramento Street, 24th Street-Noe Valley, Pacific Avenue, and West Portal Avenue NC Districts. Rear yards shall be provided at grade level and at each succeeding level or story of the building. (2) RTO-C, NC-S, NC-2, NCT-2, Ocean Avenue, Inner Balboa Street, Outer Balboa Street, Castro Street, Cortland Avenue, Divisadero Street NCT, Excelsior-Outer Mission Street, Inner Clement Street, Upper Fillmore Street, Lower Haight Street, Judah Street, Noriega Street, North Beach, San Bruno Avenue, Taraval Street, Inner Taraval Street, Irving Street, Union Street, Valencia Street, 24th Street-Mission, Glen Park, and Folsom Street NC Districts, and the Regional Commercial District. Rear yards shall be provided at the second story, and at each succeeding story of the building, and at the First Story if it contains a Dwelling Unit

(3) RC-3, RC-4, NC-3, NCT-3, Bayview, Broadway, Fillmore Street, Geary Boulevard, Hayes-Gough, Japantown, SoMa NCT, Mission Bernal, Mission Street, Polk Street, Lower Polk Street, M, SPD, MUR, MUG, MUO, and UMU Districts. Rear yards shall be provided at the lowest story containing a Dwelling Unit, and at each succeeding level or story of the building. In the Hayes-Gough NCT, lots fronting the east side of Octavia Boulevard between Linden and Market Streets (Central Freeway Parcels L, M, N, R, S, T, U, and V) are not required to provide rear yards at any level of the building, provided that the project fully meets the usable open space requirement for Dwelling Units pursuant to Section 135, meets the exposure requirements of Section 140, and gives adequate architectural consideration to the light and air needs of adjacent buildings given the constraints of the project site. (4) Upper Market Street NCT. Rear yards shall be provided at the grade level, and at each succeeding story of the building. For buildings in the Upper Market Street NCT that do not contain Residential Uses and that do not abut adjacent lots with an existing pattern of rear yards or mid-block open space, the Zoning Administrator may waive or reduce this rear yard requirement pursuant to the procedures of subsection (h). (5) RED, RED-MX and WMUG Districts. Rear yards shall be provided at the ground level for any building containing a Dwelling Unit, and at each succeeding level or story of the building. (6) Lot Coverage in C Districts. Lot coverage is limited to 80% at all levels containing residential uses, except that on levels that include only lobbies and circulation areas and on levels in which all residential uses, including circulation areas, are within 40 horizontal feet from a property line fronting a street or alley, up to 100% lot coverage may occur. The unbuilt portion of the lot shall be open to the sky except for those obstructions permitted in yards pursuant to subsections (1) through (23) of Section 136(c). Where the adjacent properties have an existing rear yard, the unbuilt area of the new project shall be designed to adjoin that rear yard. In accordance with Section 210.5, lot coverage requirements shall not be applicable for Commercial to Residential Adaptive Reuse projects. (e) Permitted Obstructions. Only those obstructions specified in Section 136 of this Code shall be permitted in a required rear yard, and no other obstruction shall be constructed, placed, or maintained within any such yard. No motor vehicle, trailer, boat, or other vehicle shall be parked or stored within any such yard, except as specified in Section 136. (f) Second Building on Corner Lots and Through Lots in RH, RTO, RM-1, and RM-2 Districts. Where a lot is a Corner Lot, or is a through lot having both its front and its rear lot line along Streets, Alleys, or a Street and an Alley, the subject lot may have two buildings, each fronting at one end of the lot, provided that all the other requirements of this Code are met. In such cases, the rear yard required by this Section 134 for the subject lot shall be located in the central portion of the lot, between the two buildings on such lot. In no case shall the total minimum rear yard for the subject lot be thus reduced to less than a depth equal to 30% of the total depth of the subject lot or to less than 15 feet, whichever is greater; provided, however, that the Zoning Administrator may reduce the total depth to 20% pursuant to Section 307(l) of this Code if the reduction is for the sole purpose of constructing an Accessory Dwelling Unit under Section 207.1, and provided further that the reduction/waiver is in consideration of the property owner entering into a Regulatory Agreement pursuant to Section 207.1 subjecting the ADU to the San Francisco Rent Stabilization and Arbitration Ordinance. For buildings fronting on a Narrow Street as defined in Section 261.1 of this Code, the additional height limits of Section 261.1 shall apply. Furthermore, in all cases in which this subsection (f) is applied, the requirements of Section 132 of this Code for front setback areas shall be applicable along both Street or Alley frontages of the subject through lot. (g) Reduction of Requirements in C-3 Districts. In C-3 Districts, an exception to the rear yard requirements of this Section 134 may be allowed, in accordance with the provisions of Section 309, provided that the building location and configuration assure adequate light and air to windows within the residential units and to the usable open space provided.