Château Haut-Marbuzet does not appear in the official 1855 Médoc Grand Cru Classé classification, which remains fixed in time and has undergone only one revision, in 1973. However, the estate is recognised as a Cru Bourgeois Exceptionnel, the highest distinction within the Crus Bourgeois du Médoc classification, which has been regularly renewed by vintage since 2020. This distinction, consistently achieved, bears witness to the château's impeccable quality and confers upon it a legitimacy comparable, in the eyes of many enthusiasts, to that of several official Crus Classés.