Waldhof Hackhausen, Architectural heritage monument in Ohligs district, Solingen, Germany.

Waldhof Hackhausen is a neo-baroque manor house in the Ohligs district of Solingen, set in a four-hectare park near the Ohligser Heide nature reserve. The one-and-a-half-storey building follows a clamp-shaped plan: two four-axis side wings project at right angles and enclose a small cour d'honneur, all covered by a deep mansard roof. It stands about 90 metres from the road, reached by two long driveways, with a coach house and a moat at the western end.

Eugen Berg, a merchant from the Solingen Berg family that ran an axe and pick factory, applied to build the mansion on 26 October 1910. The Saalecker Werkstätten drew up the plans and Paul Schultze-Naumburg, who had reconstructed nearby Schloss Hackhausen in 1907, led the work, finished in 1912. From 1911 a dynamo at the Krüdersheide oil mill supplied its electricity.

Since 1979 the privately owned manor has opened its doors for public exhibitions, house concerts and readings. The grounds and house are also passed directly by the Klingenpfad and other hiking trails, so walkers cross the estate's edge on the way through the Ohligser Heide area.

The house stands about 90 metres back from the road and is reached by two long tree-lined driveways; the Klingenpfad and other hiking trails run directly past the grounds. The estate remains private, but since 1979 exhibitions, house concerts and readings open to the public have been held there, so check ahead before visiting.

The park covers four hectares, not two, and was laid out from 1913 on the model of English bourgeois gardens. An oval swimming pool opened there in 1927. Along the two driveways west of the house stand 24 horse chestnuts protected as natural monuments in Solingen's landscape plan.