Grünewald villa, Private residence in Nacka Municipality, Sweden.

Grünewald villa is a two-storey wooden house on a high natural-stone base, built in 1895 and composed of volumes of varying heights, with a four-storey corner tower topped by an observation room. Its Swiss-style façades have bay windows, verandas and balconies, and a 100 m² studio wing was added in 1942.

Ferdinand Boberg designed the villa for his friend Knut Tillberg; it was completed in 1895 as a 550 m² year-round wooden house, one of the first of its kind in Saltsjöbaden. In 1911 publisher Ernst Hugo Geber had Carl Westman add a kitchen extension and central heating. Isaac Grünewald bought it in 1936, renamed it Saltsjöklack, and in 1942 added a 100 m² studio by Olof Grundell.

Locals call it Grünewaldvillan after 36 years of association with the Grünewald family, though it was originally Villa Lugnet and later Saltsjöklack. Since 1974 the villa has hosted gallery activities with Nacka Konstförening, and the large studio, Saltsjöateljén, remains the centre of this art work. The association Grünewaldvillans Vänner was founded in 1998 to protect the villa and support its cultural activities.

The building sits in an accessible location where the exterior can be easily viewed from the surrounding area. Visitors should approach from public spaces and respect that this is a private residence not open for interior tours.

The four-storey corner tower holds an observation room with views over Baggensfjärden and Hotellviken, including the Grand Hotel and Restaurangholmen. The villa was one of the first year-round homes in Saltsjöbaden, where most villas were built as summer houses. Its 11,000 m² slope plot was later divided, and five villas were built on the previously undeveloped western part.