In 1279, Feyregg Castle was mentioned in a document from the Lambach Abbey.
The early medieval part of the castle, including the east tower and its immediate surroundings, is still visible from the time of the Followers (until 1407). The old Gothic gate, as well as a bay window and various vaults, can still be seen in the inner courtyard.
Around 1500, the Sinzendorf family built the long wing of the old castle.
Around 1600, during the Peasants' War, Feyregg suffered greatly and, after the Peasants' War, was sold to the Spital am Pyhrn Abbey in 1629.
It became the residence of the provosts. This was arguably Feyregg's most prosperous period. It was also at this time that the castle was extensively rebuilt and given a Baroque style by the Upper Austrian architect Prunner. In 1809, the Spital am Pyhrn Abbey was dissolved, and in 1812, the well-known wealthy merchant Franz von Plank, a native of Linz, purchased the Feyregg estate.
Otto and Ruth Harmer purchased the castle and the farm in 1937. It was thoroughly renovated that year, and in 1969, the hotel "Schloss Feyregg" was established in the old castle, offering all the modern amenities.