Application of Richard and Allison Sedwick, pursuant to 11 DCMR Subtitle X, Chapter 9, for a special exception under Subtitle D § 5201 from the lot occupancy requirements of Subtitle D § 304.1, to construct a rear, screened porch addition to an existing one-family dwelling in the R-3 Zone at premises 3931 Benton Street N.W. (Square 1810, Lot 136).