Château Valduc, château in Auderghem, Brussels, Belgium

Château Valduc is an eclectic-style castle built in 1870 for Baron Paul de Cartier in Auderghem. The pale stone building with brick-toned accents has three storeys above a lower ground level, a steep pitched roof, a round tower with a conical roof on the left and a taller projecting bay with a shaped gable on the right. Notarial deeds record a dining room, pantry, conservatory, three salons and a smoking room on the ground floor, nine bedrooms above, and vaulted cellars.

The building was created in 1870 by Paul Baron de Cartier and sold in 1876 to Emmanuel de Prelle de la Nieppe, a senior judge. The estate remained in the family for decades and was later rented to Dr. Edmond Cordier, whose name the street received in 1960 to honor his connection to the area.

The name Valduc refers to the estate Valducveld, used for the property starting in 1898. The building reflects the wealth and taste of the 19th-century upper class, showing how residents of that time expressed their status through architecture and land ownership.

The castle stands on Rue Valduc, reached from the Brussels–Tervuren road; the street was named Avenue Docteur Edmond Cordier on 2 December 1960. The building is private, so it is seen from the street. The high brick wall that once enclosed the kitchen gardens still runs along Rue Valduc.

The original architect was likely Henri Beyaert, known for mixing different building styles in his eclectic designs. Today only the tall brick wall of the old gardens remains visible along the street, while a modern apartment block called Jardins du Valduc now stands where the gardens and farm buildings once stood.