Rottneby herrgård, Manor house near Falun, Sweden

Rottneby herrgård is a manor house in Stora Kopparbergs socken, Falun Municipality. The main building was erected in 1794, probably by Johan Gotlieb Gahn, and was remodelled in Neoclassical style by architect Clas Wallman in 1816, when the facade received white plaster and a new saddle roof. Only the main building and the farmhand's cottage survive from the 18th-century estate.

Rottneby is documented as an independent farm from the 16th century, held by the Stierna family, and its rise is linked to the hyttor (smelting works) of the area, in use by the 1300s. The main building was erected in 1794, probably by owner Johan Gotlieb Gahn. In 1816 architect Clas Wallman rebuilt it in neoclassical style, replacing the broken saddle roof and giving the facade white plaster. In 1867 sawmill director Christian Skröder bought the estate and renovated it, adding a tin roof and replacing stoves, windows, wallpapers, panels, floors and doors.

The name Rottneby is documented from the 16th century, when the estate was worked by the Stierna family. The Nisser family leased the manor from 1891 and lived there for more than a hundred years, until the estate was sold in the 1990s. Today the volunteer association Rottnebys vänner works to protect the building from further decay and vandalism.

The building currently requires extensive repairs, so all windows and entrances are boarded up and inaccessible. Visitors can view the exterior architecture and walk through the surrounding woodland setting.

The forest surrounding the manor was protected as a nature reserve, which sparked ongoing debates about the site's future. This tension between conservation and potential development shapes the current situation.