Sam Mahgerefteh, doing business as Great Neck-based LLC, has filed applications for a four-story, two-unit residential building at 1773 Topping Avenue, in Mount Hope, located four blocks from the 174-175 Streets stop on the B/D trains. The new structure would measure 3,703 square feet and would rise from a 17-foot-wide, 1,615-square-foot vacant lot. The units would average a spacious 1,851 square feet apiece, with the first unit occupying the ground and second floors, and the other occupying the upper two levels. The ground floor will also have an enclosed parking space. Sion Hourizadeh’s Floral Park-based Sion Associates is the applicant of record.