Schloss Naundorf, Heritage château in Naundorf, Dippoldiswalde, Germany.

Schloss Naundorf is a stone castle in Dippoldiswalde featuring architectural characteristics typical of Saxon noble residences. The building displays various structural elements and room layouts that served the functions of a manor estate.

Naundorf is documented in 1404 as an allodial estate and lordly seat. From 1473 the estate held the lower mining right and formed its own mining office with its own officials, absorbed into the Altenberg office in 1851. By 1551 it had become a knight's estate belonging to the Pirna district. The steep, stony slopes made farming barely profitable, which explains the frequent changes of owner.

The name Naundorf derives from "Nuwindorff", recorded in 1404. The village below the estate in the Rote Weißeritz valley grew separately from the manor on the slope. Since November 2018 the Freundeskreis Schloss Naundorf e. V., founded by local residents, has carried out maintenance in the castle and its garden and organises events there.

The castle stands at the upper end of Naundorf, at the village exit toward Sadisdorf, between the Ochsenbach and Saubach valleys. The park and the Otto's Eck lookout tower, restored by the Heimatverein Ottos Eck founded in 2001, are in good condition and open to visitors. The building itself is privately owned and was still undergoing securing work in recent years, so access should be confirmed with the Freundeskreis Schloss Naundorf e. V., founded in November 2018, before planning a visit.

In the cellar a late-Gothic door frame from the 15th century survives, while the ground floor keeps parts of a predecessor building from the second half of the 16th century. The octagonal stair tower carries a sandstone portal dated 1608, and its bronze clock bell came from the Dresden foundry A. E. Weinholdt.