Application of Ben Safran and Margot Locker, as amended, pursuant to 11 DCMR Subtitle X, Chapter 9, for special exceptions under the use requirements of Subtitle U § 301.1(e), under Subtitle E § 5201 from the lot occupancy requirements of Subtitle E § 404.1, and under Subtitle E § 5007 from the accessory building rear yard setback requirements of Subtitle E § 5004.1, and pursuant to 11 DCMR Subtitle X, Chapter 10, for an area variance from the accessory structure dwelling access requirement of Subtitle U § 301.1(c), to construct a two-story rear addition to the existing principal dwelling unit and to construct a two-story accessory structure in the RF-2 Zone at premises 1828 15th Street N.W. (Square 191, Lot 58).