The client, the Technical Facilities Kaiserslautern (TWK), is a modern, medium-sized public utilities company, one of about 900 in Germany. Because of this the TWK is in a constant process of innovation and professionalization. Moreover, the TWK intends to be a transparent and open participant of society. The urgently needed renovation of the water purification plant “Rote Hohl” offered an excellent opportunity to publicly show the aspired professionalism, innovation and effort towards sustainability.The Pfaelzer forest offers locals and visitors to the region attractive opportunities for daytrips. Apart from the main attraction, the forest itself, other touristic attractions include the Biosphere House in Fischbach and the House for Sustainability in Trippstadt. These houses contribute to the awareness for the environment and our natural resources. The water plant “Rote Hohl” will provide the region with water also after the renovation and upgrading. As the “House of Water” the building will provide information services to selected target groups about water, water collection, purification and distribution. The House of Water also offers space for exhibitions, workshops and events.