A Long Island City-based property owner has filed applications for a three-story, six-unit residential building at 34-31 9th Street, located in the western end of Astoria. The project will measure 5,787 square feet, which means its residential units should average 965 square feet apiece. There will be four off-street parking spaces, two of which will be housed in a garage on the ground floor. Constantine Efstathiou’s Bellmore, N.Y.-based firm is the architect of record. The 50-foot-wide, 5,009-square-foot plot is partly occupied by a three-story townhouse. The new structure will rise on the vacant portion of the lot.