The castle underwent several small arrangements over time: a small lodge was built in 1893 in the dovecote tower; in 1917 the watertightness of the chapel roof was reassured; in the 1930s, the north-east corner of the keep was rebuilt to support its eastern face. Tourbillon Castle was recognised as a historical monument by the canton of Valais at the beginning of the 20th century. In the 1960s, the condition of some of the masonry made tourist visits risky. In 1963, a Pro Tourbillon association was created and, two years later, the Swiss League for National Heritage organised the sale of a gold shield which enabled consolidation work to begin. In 1970, Tourbillon was recognised as a monument of national importance. The last major consolidation work took place between 1993 and 1999. In 1999, the Bishopric of Sion ceded the site to the Tourbillon Castle Foundation, and 400,000 francs were set aside by the Canton of Valais, the municipality of Sion and its bourgeoisie to maintain the castle. Since 2009, the chapel has been undergoing restoration.