Horace Slughorn takes up the Potions job in Harry’s sixth year. His office is located below the hospital wing (HBP18). It is described as being a very nice office, much larger than the usual teacher’s study (HBP15).
Astronomy Tower Dungeons and other subterranean chambers Gryffindor Tower Hogwarts corridors Hogwarts fifth floor Hogwarts first floor Hogwarts fourth floor
Hogwarts ground floor Hogwarts grounds Hogwarts second floor Hogwarts seventh floor Hogwarts sixth floor Hogwarts third floor Madam Hooch’s office