Appeal of Isabelle Thabault, pursuant to 11 DCMR Subtitle Y § 302, from the decision made on January 16, 2018 by the Zoning Administrator, Department of Consumer and Regulatory Affairs, to refuse to revoke building permit B1712578, to construct a front addition to an existing one-family dwelling in the R-2 Zone at premises 3840 Legation Street N.W. (Square 1857, Lot 49).