An anonymous Brooklyn-based LLC has filed applications for a four-story, eight-unit residential building at 48 Jefferson Street, located in western Bushwick. The project will measure 6,728 square feet and its residential units should average 660 square feet apiece, indicative of rental apartments. There will be two apartments on each of the first three floors, followed by two apartments across the fourth floor and an upper mezzanine level. Brooklyn-based BEAM Group is the architect of record. The 1,875-square-foot lot is occupied by a two-story townhouse. Demolition permits were filed last July.