The winery in Döbling in the 19th district of Vienna (district of Heiligenstadt) was founded in 2002 by the restaurateur Stefan Hajszan. In 2007 a new wine cellar was put into operation. In 2011 architect Heinz Neumann joined the company as a strategic partner, the name was changed to Hajszan-Neumann. The operation also included a Buschenschank on Nußberg and the restaurant "Die Winzerei". The vineyards were expanded to a total of 20 hectares of vines. They are located on Nußberg, as well as in Grinzing, Heiligenstadt, Neustift and Obersievering. 70% of the vineyards are planted with the white wine varieties Grüner Veltliner, Riesling, Chardonnay and Gemischter Satz, and 30% with Zweigelt. A scarce hectare of Riesling is cultivated on the Pfaffenberg in Stein-Krems in the Kremstal wine-growing region (Lower Austria).
Since 2005, certified Biodynamic viticulture has been practised according to the rules of the associations respect-BIODYN and DEMETER. This includes fertilization with compost, greening between the rows of vines as well as prevention of diseases and control of pests with homeopathic preparations. In the cellar we work as gently and reductively as possible. Additives are largely avoided. The classic white wines are mainly matured in steel tanks, the site wines are also partly matured in large wooden barrels or barriques. Among the premium wines are Grüner Veltliner Nußberg and Gemischter Satz Weißleiten. In 2014 the winery and the Buschenschank were sold to the winegrower Fritz Wieninger, who had already supported the conversion to biodynamic viticulture. The Hajszan-Neumann brand is retained.