Pursuant to 11 DCMR Subtitle X, Chapter 9, for special exceptions from the RF-use requirements of Subtitle U § 320.2, and the penthouse requirements of Subtitle C § 1504.1, to convert a two-story, one-family dwelling into a three-story, three-unit apartment house in the RF-1 Zone at premises 232 S Street N.E. (Square 3569, Lot 56).