An anonymous Brooklyn-based LLC has filed applications for a three-story, three-unit residential building at 5910 Eleventh Avenue, located between 59th and 60th streets in Borough Park. The project will measure 6,040 square feet and its full-floor residential units should average a family-sized 1,510 square feet apiece. Kenneth Thomas’s Rockland County, N.Y.-based firm is the architect of record. The 2,517-square-foot plot is occupied by a two-story building. Demolition permits were filed in January.