After the Second World War, Náchod Castle was confiscated from the princely Schaumburg-Lippe family and became the property of the state. The first post-war castellan was Jan Slezák. The furnishings of the castle were first listed in 1947 and again in 1950. At that time, many of the chateau furnishings were discarded or taken elsewhere. Some of the castle's inventory was stolen in the first years after the war. Even so, the castle still retains many of the original objects, supplemented by equipment from the so-called second category castles (i.e. from monuments that were not selected for public access). These were, for example, items from the Horní Maršov or Bílé Poličany castles. At the end of the 1940s, the castle was reopened to visitors (tours of Náchod Castle were already taking place under the Schaumburg-Lippe family). In 1952, the tour route was modified, the original wallpaper was removed and many objects were placed in the depositories. The interiors of the chateau were intended to resemble mainly the Piccolomini collections, but the interiors also displayed family portraits of members of the Schaumburg-Lippe family that came from the chateau in Ratibořice. Since 1958, the grounds of the Náchod castle have been protected as a monument. In the 1960s, preparatory work began for the complete restoration of Náchod Castle. The so-called model restoration began in the 1970s, when the chateau was closed to the public. The restoration included the complete replacement of windows, doors, fences and the creation of new sgraffito facades. The castle was opened to visitors in 1977. At that time the interiors were rebuilt. All rooms were whitewashed and the old floors were covered with modern parquet friezes. The exhibition strictly presented the Piccolomini era and Baroque art. Many of the original castle furnishings ended up in the depositories. However, the complete restoration of the site was not completed. It stopped at the entrance buildings - the clerical wing and the turion. Organisationally, the Náchod chateau fell under the Regional Centre for State Heritage Protection and Nature Conservation in Pardubice (KSSPPOP). After 1989, minor modifications were made to the chateau interiors, as it presented objects that were returned to the original owners (e.g. to the Rychnov nad Kněžnou or Doudleby nad Orlicí chateaus). At that time, the Schaumburg-Lippe family made a claim for restitution of the castles in Náchod and Ratibořice, but unsuccessfully. In the 1990s, it was administered by the Institute of Monuments in Pardubice, and since 2003 by the National Institute of Monuments, a territorial expert workplace in Pardubice.