Property owner Ai Zhu Lu, doing business as a anonymous Elmhurst-based LLC, has filed applications for a six-story, seven-unit mixed-use building at 54-21 Roosevelt Avenue, in Woodside. The project will measure 9,944 square feet. The ground floor will host 1,826 square feet of retail space, followed by 1,252 square feet of medical offices on the second floor. Residential units, averaging a rental-sized 655 square feet apiece, will be located on the third through sixth floors. Chang Hwa Tan’s Flushing-based architectural firm is the architect of record. The 23-foot-wide, 2,140-square-foot property is currently occupied by a two-story house. Demolition permits were filed in March. The 52nd Street stop on the 7 train is three blocks away.