(Bldg. 2) Classrooms building: bank; post office; language laboratories, teachers’ offices, bookstore, health center, bank, International Business Faculty
(Bldg. 3) Dr. Narong Mongkhonvanit Memorial Building: computer laboratories, hotel and tourism operating room, purchasing department
(Bldg. 4) Thai Pavilion: cafeteria; cultural center, television studio, physics laboratories, multimedia production house and Student union building; 7-Eleven convenience store; guidance, counseling and student loan office
(Bldg. 12-14) Faculty of Engineering; Faculty of Science; Faculty of Nursing : classrooms; laboratories and offices
(Bldg. 12)Royal Majesty Jubilee Building: central library / 1,500-seat auditorium / cafeteria / Siam media complex / Registration Department
(Bldg. 15) 30th Anniversary Building: IT center; main computer laboratory; classrooms
Main Cafeteria: Thai, Japanese; Korean food
(Bldg. 18): Dept. of Computer Science and Electrical Engineering
(Bldg. 19) Golden Jubilee Building: Admissions Office, University Council Conference Room, Office of the President, Office of Graduate Schools, University Theater, Siam Heritage Lounge, a small demonstration hotel, a 700-car parking garage, research center, lecture rooms and additional Placement Division services.
(Bldg. 20) Siam University Sports Complex: air-conditioned fitness center, full-sized basketball, volleyball, badminton courts and table tennis facilities, mock-up courtroom.