It was probably built by the powerful Vaz family to expand the territory controlled by nearby Alt-Süns Castle.

In 1437 the two castles were specifically mentioned in a treaty between Heinrich von Werdenberg-Sargans and the Cantons of Schwyz and Glarus.

The southern wall of the tower was intentionally collapsed by the victorious attackers in 1451 during a war between the residents of the Schams valley against Werdenberg-Sargans.

[3] As part of the peace treaty, the Counts could rebuild the castle if the League of God's House gave their approval.

Fireplaces, two garderobes and sitting places by the windows show that the third and fourth stories were permanently inhabited.