[1] Einsiedeln Abbey was granted farms at Pfäffikon along with surrounding land along Lake Zurich by Emperor Otto I in 965.

In 1299 the Prince-Abbot Johann von Schwanden added walls, ramparts and a moat to the tower during the Marchenstreit conflict between the Schwyz and the Abbey over grazing rights.

On the night of Epiphany in 1314 a mob from Schwyz attacked the Abbey attempting to destroy the land and tax records.

[3] Following the 1798 French invasion and the creation of the Helvetic Republic Pfäffikon Castle was heavily damaged and declared the property of the Canton of Linth.

Today the castle and its restaurant are available for conferences, piano concerts, meetings and events,[3] while the residential wings are used for municipal administration.

The main entrance is located on the west side of the first floor and was reached by a wooden staircase that could be pulled up if needed.

The tower was probably originally topped with a wooden structure that overhung the stone walls, before it was replaced with the current roof.