In October 2009 the construction work of the world largest Passive House settlement with 1.700 flat at 100.000 m² has started.
Within a tender the City administration of Vienna has stated the Passive House standard as a precondition for building on the 20 ha former railway area. 7 property developers have submitted their concepts for building story buildings, showing a heating energy demand between 7 and 15 kWh/m².a. The residual heat energy demand will be covered by district heating and the settlement is very close to an underground station. In the year 2010 in Austrians capital Vienna 20-30% off all new houses will already be built in Passive House standard.