Hostels of IIT Madras have the same facilities for UG, PG and Phd. students. Some hostels accommodate both UGs and PGs. M.Techs, MS students and Research scholars are given single seater rooms, but this is subject to availability. Else, they have to share a room with one or two other students. The hostel facilities are decent.
IIT Madras hostel facilities are the same for students of all degree programs. M.Tech, MS, or Ph.D. students don’t get any different facilities.
The hostels have a sports room with carom, TT, etc. Badminton court and other sports facilities are also available inside the hostel premises.
The hostel facilities are the same for B.Tech and PG students.
Hope this gives you an idea about the hostel facilities at IIT Madras.