Increase in the allowable height of a building up to a maximum of five additional feet in a C1, C2, C3, CR, CPD, CH, CA, DSP, MS, IND, IMU, IMU-R, or SFMU zones; and up to a maximum of three additional feet in an R1, R-3050, R-2250, R-1650 or R-1250 zone for the purpose of permitting cupolas, spires, turrets or other design features consistent with the architectural style of the building. In the C1, C2, C3, CR, CPD, CH, CA, DSP, MS, IND, IMU, IMU-R, or SFMU zones an increase in height of up to 12 feet is allowed for trellises or shade structures for rooftop parking areas as long as these structures do not cumulatively cover more than 50% of the rooftop parking area.