there are students welfare association in the campus to help you in that
you can search there phone numbers on the official site of cusat
they are helpful and help you in finding a room as you want
when they are free they put up a banner outside the councelling venue to help freshers out
flats are availble in which three to six rooms are present for stdents to live on a share basis
rent there is quite affordable
everything varies according to the room you take