Since the 8th century, the village of Maurepas (formerly spelled Malrepast) belonged to the Abbey of Saint-Denis. Facing the Normans invasions, they left the domain to the Lords of Chevreuse; the castle was given to the family of Malrepast. A wooden keep was replaced by a stronger castle. During the Hundred Years' War, the Lords of Malrepast abandoned the castle; it was then used as a haunt by a band of plunderers. In 1425, the English captured and hung all the occupants of the castle. The castle was then occupied by Aymon de Massy.