Economy and ecology in architecture are seen by most ascontradictions. On the other hand traditional building concepts andvernacular architecture all over the world use local renewable materialsand building methods as well as designs based on optimizations, traditionsand culture and thus follow an economic and ecologic approach. Theenvironment is not a world outside the economy. Well considered ecologicapproaches and solutions for socio-ecological problems can triggerinnovation and economic success. As architects we have an increasingresponsibility towards sustainability. In this context the use of buildingcost optimization and life cycle cost optimization without compromisingquality will be part of the „Ecological Economy in Architecture”. The goalwill be to create consumer value on several levels. Ecologic architecturalprojects will create economic competitive advantage in conjunction withthe creation of unique selling points. The starting points will be the wellbalancedanalysis and management of economic efficiency, ecological, social and cultural aspects - considering all stakeholders and the wholelifecycle of buildings. Hence current ways of design, decision-making, communication and education must be questioned from all sides.