La Reggia di Valcasotto was erected some time around the 10th century. It later became a Carthusian Monastery and was destroyed by a series of fires. It was renovated during the 18th century. The monks were suppressed in the early 19th century during the occupation by French troops.
Charles Albert purchased the property in 1837. Itt remained in Savoy hands until 1881. In that year, with only slight alterations to the original monastery, it became a castle, and was mainly used by Victor Emanuel II for his hunting trips. Humbert I decided, after 44 years as a Savoy possession, to sell it to private owners.