Housing Services Office (HSO)/Single Service Member Housing is located at 10720 Mount Belvedere Blvd., Bldg. P-10720 Clark Hall, 2nd Fl., Rm. A2-54, Fort Drum, NY 13602. Housing Services Office (HSO)/Single Service Member Housing can be reached by their main phone number at (315) 772-6668. The listed DSN line is 312-772-6668. Visit the Housing Services Office (HSO)/Single Service Member Housing website by clicking here.