Appeal of Stephen Cobb, pursuant to 11 DCMR Subtitle Y § 302, from the decision made on May 18, 2018 by the Zoning Administrator, Department of Consumer and Regulatory Affairs, to issue building permit B1804093, to construct a third floor and a three-story rear addition and convert the existing principal dwelling unit to a flat in the RF-1 Zone at premises 1267 Penn Street N.E. (Square 4060, Lot 233).