In the High Middle Ages, the name Hus stood for a fortified residence, and one such was first mentioned in a document here in 1247. Since mineral mining had been taking place in the area since the early Middle Ages, it cannot be ruled out that a fortification was located here much earlier.
In the 13th and 14th centuries, the area around the castle was the property of the Archbishopric of Salzburg, who gave the administration of the property to feudal lords. The family of Wulfingus de Huse, mentioned as the owner in 1247, died out in the male line in 1279, and Archbishop Friedrich appointed Ortlof von Saurau as administrator, who had previously married Matza von Haus. At that time, the castle was called vetus domus, or “old house,” so a newer fortress must have already existed. This may have been Silberberg, located a little downstream on the other side of the valley.
In 1396, Archbishop Gregor appointed Bishop Konrad von Lavant as the caretaker of Althaus. In 1449, Althaus was described as dilapidated, but was made habitable again. In the 16th century, the owners preferred Silberberg as their place of residence, but the importance of Althaus increased again because it had to protect the numerous mines that had been in operation in the area since the beginning of the 16th century. After the mines were exhausted, however, the castle's days were numbered; it was abandoned and fell into disrepair. The last news about the castle is a letter from 1628 in which Regina Grimmigin, née Teuffenbach, asserted inheritance rights.
The land on which the remains of the castle are located now belongs to a neighboring farm. The ruins are a listed building.