Department of Magical Law Enforcement. Including Auror Headquarters, Misuse of Muggle Artifacts Office, Wizengamot Administration Services, and Improper Use of Magic Office.

Epartment of Magical Accidents and Catastrphes. Including Accidental Magic Reversal Squad, Obliviator Headquarters, and Muggle-Worthy Excuse Committee.

Department of the Regulation and Control of Magical Creatures. Including, Beast Division, Being Division, Spirit Division, Goblin Liaison Office, and Pest Advisory Board.

Department of INternational Magical Cooperation. Including the International Magical Trading Standards Body, International Magical Office of Law, and the International Confederation of Wizards, British Seats.

Department of Magical Transportation. Including Floo Network Authority, Broom Regulatory Control, Portkey OFfice, and Apparition Test Center.

Department of Magical Games and Sports. Including British and Irish Quidditch League Headquarters, Official Gobstones Club
and Ludicrous Patents Office.

The Atrium, including The Reception Area, Fountain of Magical Brethren, Security Desk, and Lifts.

Department of Mysteries. This includes, Hall of Prophecies, The Death Chamber, The Brain Room, "The locked room." which according to dumbledore, investigates the powers of the heart.