Pursuant to 11 DCMR §§ 3103.2 and 3104.1, for a variance from the closed court width and area requirements under § 776, and a special exception from the roof structure setback requirements under §§ 411 and 770.6, to allow the construction of a new mixed-use residential building in the DD/C-3-C District at premises located on Square 453 and Lots 40, 50, 815-819, 821, 835, and a portion of a public alley to be closed.