For the first time around 1200 two knights residing in the castle atendenich were mentioned in a document. It is believed that the castle goes back to a property acquired by the Cassius monastery in 1135, but this is no longer verifiable. At the end of the 15th century, the castle passed from the knights of Endenich to their descendants vam Huys. In 1616 the daughter of the castle owner married the Cologne baron Engelhard von Weichs from Rösberg, who owned the castle from 1619. The main castle was destroyed at the latest in the Palatinate War of Succession (1688–1697), possibly even earlier. In 1690 it was sold to the court chamber director Johann Heinrich von Lapp of the Electorate of Cologne. However, he died in 1710 and his only son Joseph Clemens von Lapp inherited the castle, which he had renovated and expanded thanks to the prosperity of his wife Maria Catharina Canto. The von Lapp family lived in the castle until 1812 when they sold it to Legation Councilor Karl Wilhelm Nose. In 1830 it was acquired by District Administrator Ludwig Eberhard von Hymmen. Endeich Castle remained in the possession of the von Hymmen family for 132 years through inheritance, until it was sold to the city of Bonn in 1962 for only 400,000 German marks and is still the property of the city to this day. On December 4, 2006, the Endeich Castle was entered in the list of monuments of the city of Bonn.