KOSASS is a residential college that accommodates members of the Reserve Officers’ Training Unit (PALAPES). However, there are also civilian students who are housed in KOSASS.
KOSASS has six buildings, consisting of one administrative building and five residential blocks. The residential blocks at KOSASS comprise two male student blocks—Napuh Block and Pelanduk Block—and three female student blocks—Rusa Block, Kijang Block, and Seladang Block.
There are many facilities provided by the college for student activities. These include Balai Minda, Balai Rahmat, Dewan Jauhari, a futsal court, a volleyball court, a netball court, and the Medan Intelektual. In addition, there is also a cooperative store and a cafeteria where students can purchase daily necessities and have their meals.