From 1605 to 1622 the house was owned by Bernard Walter of Walthersweil and, from 1622 to 1624, by the Schranz of Schranzenegg family, who sold it to Siegmund Friedrich, Count Trautmannsdorff. During the rule of Sigmund Frederick the Younger of Trautmannsdorff, Oberthal House was converted and expanded between 1656 and 1661 into one of the most splendid in the area around the state capital. Above the house, a large pleasure garden ("Lustgarten") was established, based on French prototypes, surrounded by a wall and decorated with grottos and a small maison de plaisance. In 1798 Thal House and its estate was sold to Leopold Edler of Warnhauser and remained in the possession of his family until 1841. From 1841 onwards the palace was owned by the "Freiherren" of Walterskirchen. In 1846 the house was remodelled into the Romanesque style of a Scottish castle.