I believe that this is zoned C-3-C.
First, here is WBJ reporter Michael Neibauer's tweet:
In its new lot between Florida and P NE, Aria envisions the charm of Bloomingdale/Eckington, and the zoning of NoMa. http://bizj.us/1lbyuk
And here is his WBJ post:
New York City-based Aria Development Group has already made big strides in Northwest D.C. with its purchase and renovation of the historic Bond Building, The Alden in Columbia Heights, and The Remington in Foggy Bottom, plus new construction of a 150-unit building on Clifton Street.
Now, it’s on to NoMa.
Aria on Wednesday paid $11 million for roughly a third of an acre covering 18-24 P St. NE and 21-27 Florida Ave. NE. D.C.-based Pers Development had assembled the site, located one block east of North Capitol Street and less than a quarter mile from the NoMa-Gallaudet Metro station, in multiple transactions between 2007 and 2009.