The Sustainable development strategies’ focus is on five dimensions: economic sustainability, social sustainability, ecological sustainability, sustainable spatial development, and cultural continuity. Thus, sustainable housing is one of the fundamental pillars of sustainable development, and sustainable urban development can be discussed in this context. The target of sustainable urban development process is to achieve the status of "sustainability" in urban communities and also to create or to strengthen the sustainability’s characteristics of economic, social, cultural and environmental city. This essay tries first to have a brief review on the history of sustainable development. Then, it continues to find out how to promote that concept and why it is necessary to be focused through different definitions. To understand the principles and pillars of sustainable development, based on the current worlds’ environmental, economic, social and political realities, concepts, words and condition of the Earth Summit, the Rio Declaration and the Works Program of 21 and the different experts and researchers’ views are used. Then by reviewing the principles and concepts of sustainable development (in general), a primary concept of sustainable urban development (in particular) is achieved. Finally, some general suggestions are made on the sustainable urban development, urban planning and the importance of providing realization conditions of the urban sustainable development. What is important here is to emphasis on Physical – space considerations which are under focus in this research too. And the most important points which should be considered as a Physical consideration in sustainable settlement is also mentioned in this paper. By comparing what should be done with what is today common in urban development planning, and according to above-mentioned comments and topics, it can be concluded that to achieve the urban sustainability, It is necessary to make some structural reforms and to create some deep and fundamental changes in all levels of society, especially in the three levels of: ‘government and management’, ‘technology’ and ‘life methods’
