An anonymous Brooklyn-based LLC has filed applications for four three-story, three-family residential buildings at 2064-2074 57th Street, located in Mapleton, in southern Brooklyn. The buildings will measure 6,082 square feet each. Across all three, the full-floor residential units should average 1,499 square feet apiece. Apartments that big are typically indicative of family-sized configurations. Kenneth Thomas’s Rockland County, N.Y.-based firm is the applicant of record. The 10,018-square-foot assemblage was occupied by two houses until earlier this year, when they were demolished.