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SEC. 109. SEVERABILITY. (a) If any section, subsection, subdivision, paragraph, sentence, clause or phrase of this Code, or any part thereof, is for any reason held to be unconstitutional or invalid or ineffective by any court of competent jurisdiction, or other competent agency, such decision shall not affect the validity or effectiveness of the remaining portions of this Code or any part thereof. The Board of Supervisors hereby declares that it would have passed each section, subsection, subdivision, paragraph, sentence, clause or phrase thereof, irrespective of the fact that any one or more sections, subsections, subdivisions, paragraphs, sentences, clauses or phrases be declared unconstitutional or invalid or ineffective. (b) If the application of any provision or provisions of this Code to any lot, building, sign or other structure, or parcel of land is found to be invalid or ineffective, in whole or in part by any court of competent jurisdiction, or other competent agency, the effect of such decision shall be limited to the property or situation immediately involved in the controversy, and the application of any such provision to other properties and situations shall not be affected. (c) This Section 109 shall apply to every Article of this Code, as the Code has existed in the past, as it now exists and as it may exist in the future, including all modifications thereof and additions and amendments thereto. (Amended by Ord. 443-78, App. 10/6/78) ARTICLE 1.2: DIMENSIONS, AREAS, AND OPEN SPACES Sec. 121. Minimum Lot Width and Area. Sec. 121.1. Development of Large Lots in Neighborhood Commercial Districts Located in the Priority Equity Geographies Special Use District. Sec. 121.2. Non-Residential Use Size Limits in Neighborhood Commercial and Neighborhood Commercial Transit Districts. Sec. 121.3. Development of Large Lots, Chinatown Mixed Use Districts. Sec. 121.4. Non-Residential Use Size Limits in Mixed Use Districts. Sec. 121.5. [Division of Spaces Exceeding Non-Residential Use Size Limits.] Sec. 121.6. Large-Scale Retail Uses. Sec. 121.7. Restriction of Lot Mergers in Certain Districts, on Pedestrian-Oriented Streets, and for Lots with Historic Buildings. Sec. 121.9. Subdivision of Large Lots, PDR Districts. Sec. 122. Height and Bulk Limitations. Sec. 123. Maximum Floor Area Ratio. Sec. 124. Basic Floor Area Ratio. Sec. 124.1. Floor Area Ratio Exceptions: Chinatown. Sec. 125. Floor Area Premiums, Districts Other than NC, C-3 and Mixed Use. Sec. 127. Transfer of Permitted Basic Gross Floor Area. Sec. 128. Transfer of Development Rights in C-3 Districts. Sec. 128.1. Transfer of Development Rights in the Central SoMa Special Use District. Sec. 130. Yard and Setback Requirements, General. Sec. 131. Legislated Setback Lines. Sec. 132. Front Setback Areas in RTO, RH, and RM Districts and for Required Setbacks for Projects in NC and RTO-C Districts, and Planned Unit Developments. Sec. 132.1. Setbacks and Streetwall Articulation: C-3 Districts. Sec. 132.3. Sun Access for Sidewalks Setbacks – Chinatown. Sec. 132.4. Setbacks, Streetwall Articulation, and Tower Separation in the Central SoMa Special Use District. Sec. 133. Side Yards, RH-1(D) Districts. 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. Sec. 134.1. Site Coverage in Chinatown Mixed Use Districts. Sec. 135. Usable Open Space for Dwelling Units and Group Housing, R, NC, Mixed Use, C, and M Districts.

Sec. 135.1. Open Space Requirements for Uses Other than Residential in Chinatown. Sec. 135.2. Usable Open Space for Live/Work Units in Newly Constructed Buildings or Expansions of Existing Buildings. Sec. 135.3. Usable Open Space for Non-Residential Uses in the Eastern Neighborhoods Mixed Use and DTR Districts. Sec. 136. Obstructions Over Streets and Alleys and in Required Setbacks, Yards, and Usable Open Space. Sec. 136.1. Awnings, Canopies and Marquees. Sec. 136.2. Window Replacement Requirements. Sec. 137. Modification of Certain Plazas, Arcades, and Sidewalks. Sec. 138. Privately-Owned Public Open Space (POPOS) Requirements. Sec. 138.1. Streetscape and Pedestrian Improvements. Sec. 139. Standards for Bird-Safe Buildings. Sec. 140. All Dwelling Units in All Use Districts to Face on an Open Area. Sec. 141. Screening of Rooftop Features in R, NC, C, M, WMUG, WMUO, RED, RED-MX, SALI and Mixed Use Districts. Sec. 142. Screening and Greening of Parking and Vehicular Use Areas. Sec. 144. Street Frontages in RH, RTO, and RM Districts. Sec. 144.1. Moderation of Building Fronts in RM-1 and RM-2 Districts. Sec. 145. Frontages, Outdoor Activity Areas, Walkup Facilities, and Ground Floor Uses and Standards in Commercial, Residential-Commercial, Neighborhood Commercial, Mixed Use, and Industrial Districts. Sec. 145.1. Street Frontages in Neighborhood Commercial, Residential-Commercial, Commercial, and Mixed Use Districts. Sec. 145.2. Outdoor Activity Areas in NC Districts. Sec. 145.3. Maximum Street Frontages – Chinatown. Sec. 145.4. Required Ground Floor Commercial Uses. Sec. 145.5. Ground Floor Standards in Industrial and PDR Districts. Sec. 146. Sunlight Access to Public Sidewalks in C-3 Districts. Sec. 147. Reduction of Shadows on Certain Public or Publicly Accessible Open Spaces in C-3 and Eastern Neighborhoods Mixed Use Districts. Sec. 148. Reduction of Ground-Level Wind Currents for Buildings Taller than 85 Feet in Certain Districts. Sec. 149. Better Roofs; Living Roof Alternative.

(The diagrams in this Article are illustrative only, and not a part of the adopted ordinance.) SEC. 121. MINIMUM LOT WIDTH AND AREA. (See Interpretations related to this Section.) The following requirements for minimum lot width and area shall apply to all properties in the City, regardless of the use of the property, regardless of the zoning district in which the property is located, and regardless of whether the ownership or use is public or private. The provisions of Article 1.7 of this Code, and especially Sections 173, 180 and 189 thereof, shall also be applicable with respect to lot width and area. (a) Frontage. Every newly created lot shall have and maintain frontage on a public street or alley as defined by this Code, or on some other permanent right-of-way from which there shall be vehicular access to such lot, and in each case such frontage shall have a minimum width of 16 feet. Where an existing lot of record does not have such frontage, but has other access from a street or alley, such other access shall be maintained for such lot. (b) Subdivisions and Lot Splits. Subdivisions and lot splits shall be governed by the Subdivision Code of the City and County of San Francisco and by the Subdivision Map Act of California. In all such cases the procedures and requirements of said Code and said Act shall be followed, including the requirement for consistency with the General Plan of the City and County of San Francisco. (c) Measurement. The lot width shall be measured as a horizontal distance between the side lot lines. The lot area shall be measured as a horizontal plane enclosed by the lot lines. Where a lot is not in the form of an ordinary rectangle, the specified minimum lot width shall be maintained for a sufficient depth on the lot to enable the minimum lot area requirement to be satisfied within the portion of the lot having such minimum lot width.

(d) Minimum Lot Width. The minimum lot width shall be 20 feet.:1 (e) Minimum Lot Area. The minimum lot area shall be 1,200 sq. ft. (Added by Ord. 381-79, App. 7/13/79; amended by Ord. 188-15 , File No. 150871, App. 11/4/2015, Eff. 12/4/2015; Ord. 248-23, File No. 230446, App. 12/14/2023, Eff. 1/14/2024) AMENDMENT HISTORY Division (b) amended; Ord. 188-15 , Eff. 12/4/2015. Divisions (b), (d), and (e) amended; divisions (d)(1)-(2), (e)(1)-(2), and (f) deleted; Ord. 248-23, Eff. 1/14/2024. CODIFICATION NOTE 1. So in Ord. 248-23 SEC. 121.1. DEVELOPMENT OF LARGE LOTS IN NEIGHBORHOOD COMMERCIAL DISTRICTS LOCATED IN THE PRIORITY EQUITY GEOGRAPHIES SPECIAL USE DISTRICT.