The House of Sustainability is an architectural study as the result of a multi-stage participatory planning process for the future use/development of a central area in the center of the forestry town of Tharandt. In the past, the German House (host cities, cultural hall, cinema) was located on this area. With the demolition of the former Deutsches Haus hotel and inn in 2014, a central inner-city fallow or empty area was created. The design presented here (tree house / house of sustainability) is the result of a feasibility study on the district development of the central inner-city location in the forestry town of Tharandt from 2014. The House of Sustainability design for Tharandt reflects the genius loci of the forestry town of Tharandt, brings together modern hi-tech and original nature and creates a symbiosis of city and natural landscape in dialogue with the traditional architecture of the surrounding area (church, castle, town hall). The glass facade creates transparency and draws attention into the interior. There is a large space there for trees and plants that need special protection in our climatic conditions or their own climate. In this way, the building also creates a link to the forest botanical garden, which can be expanded with the tree house/house of sustainability to include plants and plants from other latitudes on earth.