Pursuant to 11 DCMR §§ 3103.2 and 3104.1, for variances from the required standards for rear yard (section 774), lot occupancy (section 772), off-street parking (section 2101) and loading facilities (section 2201), and special exception relief pursuant to section 1906, from the streetwall requirements under subsection 1903.3, and the roof structure requirements under subsection 770.6, to allow the development of a six-story mixed-use residential building with ground floor retail/service uses in the Arts/C-2-B District at premises 710 Florida Avenue, N.W. (Square 416, Lot 31).