In September 1934, the Harnischmachers approached Breuer about building a small apartment house with four duplex apartments on a piece of land near their own house in Wiesbaden. Breuer sent several sketches of apartments with a two-story living room and a full wall of windows, similar in conception to the unbuilt weekend house on the Danube. Breuer proposed collaborating with Gustav Hassenpflug on the project as he was no longer based in Germany and was splitting his time between Budapest and Zürich. Politics and a general building prohibition prevented the project from proceeding further than the planning stages.