A society needs to develop，new trends need to be accepted，understood and implemented by the people，who use these trends．There is a close relationship between the environment and living beings，which is described by the term Ecology 1．People are interacting with the environment，they shape their environment．in the same way,as the environment shapes the people．In a situation，where planners are creating new living environments，they are imposing something new to the people．New advancing green building concepts，Eco-City concepts and sustainable concepB can only be SuccessfuI，if people who live in them fully understand them，and are willing to implement new life-styles into their daily life．That implies．that the entities of a community．the people themselves intemalise the coneepts Of ecology． This article will show some examples．were the development of a community and the development of an ecologic environment．neighbourhood．goes hand in hand．The communities in these examples have been formed through self-imposed ecologic．green building projects．These are examples，where new technologies and new ideas had been implemented at a time when the knowledge of new．ecologic friendly approaches was very 1imited．But a strong community sense made these projects Successful．The article will try to examine the importance and the dynamics of a community．and their ef-fect on a built environment under ecologic and social aspects． pproaches was very 1imited．B