San Francisco County Municipal Code § 4.201 Add the following section

(a) Newly constructed Group R occupancy buildings are required by California Title 24 Part 6 Energy Standards to install photovoltaic (PV) energy systems. For newly constructed multifamily buildings the minimum size of such systems is required by Section 170.2(f) and 170.2(g) to be not less than the smaller of PV system size determined by Equation 170.2-C or Equation 170.2-D, or the total of all Solar Access Roof Area (SARA) multiplied by 14 W/ft2. Projects that constitute a Large Development Project or Small Development Project under the Stormwater Management Ordinance (Public Works Code secs 147-147.6) may exclude from SARA any roof area where both: (1) The area is occupied by living roof, meaning the area of media for growing plants, and (2) The area occupied by living roof contributes to determination of compliance with the Stormwater Management Ordinance, as documented by a Preliminary Stormwater Control Plan or a Modified Compliance Application submitted to the San Francisco Public Utilities Commission. (b) In any final Stormwater Control Plan approved by the San Francisco Public Utilities Commission, including where such approval may occur subsequent to addenda to a Site Permit wherein compliance with California Title 24 Part 6 Energy Standards is documented, the applicant shall ensure the area occupied by living roof contributing to determination of compliance with the Stormwater Management Ordinance is no less than the square footage approved for exclusion from SARA.