In Special Mixed Use Districts where the designated Residence District is an R6 through R12 District, the street wall location of a building shall be as set forth in 123-651 (Street wall location for all buildings), and the height and setback regulations of a building or other structure shall be as set forth in Section 123-652 (Special base and building heights). Additional height and setback provisions are set forth in Section 123-653 and Section 123-66, inclusive.

Permitted obstructions shall be permitted pursuant to Sections 23-41, 24-51 or 43-42. In addition, for all buildings or other structures, a dormer may be provided in accordance with the provisions of paragraph (b)(1) of Section 23-413 (Permitted obstructions in certain districts).

The height of all buildings or other structures shall be measured from the base plane. For the purposes of this Section, where base planes of different elevations apply to different portions of a building or other structure, each such portion of the building may be considered to be a separate building.