Located on the seventh floor, Gryffindor tower is a tall and imposing section of the castle. The entrance is hidden behind a painting of the Fat Lady, who often entertains herself by forcing students to listen to her sing horribly off-key before admitting them. Once she does decide to swing open, a round opening in the wall is revealed. The room is decorated with comfortable armchairs, sofas, tables and a fireplace. Two staircases lead in opposite directions; one to the girls' dormitory and the other to the boys'. Should a boy decide to try and climb the girls' staircase, it will set off a wailing klaxon charm and transfigure into a slide.

Ravenclaw tower is located on the west side of the castle. The entrance is reached by climbing a tightly winding spiral staircase that starts on the fifth floor. The door is guarded by a bronze knocker in the shape of an eagle. Rather than ask a password, the eagle asks a question. Once answered correctly, he will allow entrance and swing the door open. The common room is decorated in shades of navy and bronze, with armchairs and sofas as well as tables and bookcases neatly placed about. The room is wide and airy. A starry cushy rug is set near the fireplace while the ceiling of the room is painted with matching stars. The windows are arched and give a breathtaking view of the surrounding mountains. On the other side of the entrance is a door that leads to the dormitories. Next to it is a white marble life-sized statue of Rowena Ravenclaw, complete with her diadem.