This office is used by Cuthbert Binns as Professor of History of Magic. The office has a fireplace. It also has two closets, the teacher's desk and a table. Behind a curtain is Cuthbert's bed, although since becoming a ghost it is unlikely that he has used it.

This is the bathroom where Graham Montague appeared after entering the Vanishing Cabinet in 1995.

A large storage room used for various things over the years. This room is where the Mirror of Erised was kept from September to December 1991.

This study area is a library on the fourth floor, located near Classroom 4F. There is a secret passageway hidden behind a bookshelf which leads to the Seventh-floor corridor, just opposite a portrait of Sir Cadogan, as well as another behind a tapestry. There is a large fireplace, and a door leading to the Fourth Floor Corridor.

The Restricted Section is an area in fourth floor section of the Hogwarts Library closed off by a rope and only accessible to students with permission from a professor. In order to enter, they must present a signed note from a professor. The books within the Restricted Section typically discuss the Dark Arts or other information not for the general public or young children. They may be studied by older students for Defence Against the Dark Arts.