The Entrance Hall Antechamber is a little building before the Entrance Hall where Professor Minerva McGonagall makes the first year students wait before the Sorting ceremony and the Welcoming Feast. This building became the Entrance Courtyard. The Entrance Hall Antechamber used to be one of the main entrances to the castle, the others being the Stone Circle and the Training Grounds.

The Great Hall in Hogwarts is the main gathering area in the school. Students eat their meals, receive daily owl posts, and have certain special events. The Great Hall is a large hall that can easily hold all of the schools students, staff and guests. It has tall walls that reach up to the ceiling, which is enchanted to look like the sky above.

A long, panelled room with mismatched, dark wooden chairs. There is a wardrobe inside it which was once home to a Boggart before the 1993 Defence Against the Dark Arts teacher, Professor Remus Lupin, taught his third-year class how to vanquish it. The entrance to this room is guarded by two stone gargoyles that can talk. These gargoyles were partially destroyed during the Battle of Hogwarts.

The caretaker's office is the room where Argus Filch lives in Hogwarts Castle. It is connected to the Entrance Hall, in the Ground Floor of Hogwarts Castle. It's a small, simple room with a single oil lamp in the ceiling. It smells vaguely of fried fish. There are filing cabinets in it with details of the misdeeds of Hogwarts Students.