Application of Benjamin Flowers, as amended, pursuant to 11 DCMR Subtitle X, Chapter 9, for special exceptions under Subtitle G § 1200 from the lot occupancy requirements of Subtitle G § 404.1 and from the side yard requirements of Subtitle G § 406.2, and under Subtitle G § 1201 from the rear yard requirements of Subtitle G § 405.2, and pursuant to 11 DCMR Subtitle X, Chapter 10, for a variance from the nonconforming structure requirements of Subtitle C § 202.2, to construct a two-story rear addition to an existing one-family dwelling in the MU-4 Zone at premises 508 7th Street S.E. (Square 903, Lot 23).