Role of ethical dimension of urban form: The research is an attempt to recognize the role of ethical dimension of urban form as an important determinant of design. In retrospective; the research is concerned with finding an integrated mechanism or tool that enables the integration of basic applied ethical values in plans of urban space, to produce a tool that can be used to evaluate the intangible aspects of sustainability underlying ethics. a) Research endeavor to encompass, through the historical evolution of the urban fabric, the priorities held in different civilizations and so to enlighten commune crystallized values b) Conducting an inquiry into the intangible dimension of sustainability, the ethical dimension of the urban form, to analyze the grounds which such dimension rests on. c) Reaching an analytical understanding of the basic values embedded in the urban form as an unitary field of studying the right and the good. d) Helping to the creation of more ethical communities by sustainable cities. No field concerning urban ethics: In this century it is possible to point to several people who have helped us to see how we were going wrong in our cities by neglecting nature and organic communities. Information about sustainability in the prevailing literature is often to be found fragmented, encrusted with statistics or expressed in a specialized language: Unfortunately, at present there is no trans-disciplinary language across the built environment that can bring together the diversity of interests necessary in studying the built environment for sustainability Furthermore few urban form theories in western cultures approached issues of ethics. Till now there is no field concerning urban professional ethics as bioethics, business ethics. The closely attempt was made by Lynch in his theory of a good city form but he limits himself to discuss the spatial functions of these elements. Set of universal values and respecting local values: Identifying the applied ethical values underlying the organization and planning of the built urban form is the strategy most relevant to the implementation of ethics and urban form. Research stands on the capacity of interpreting urban concepts in light of ethical values. The principles of traditional architecture and urbanism are not historic phenomena; they cannot be outdated. They are practical responses to practical problems. The task is to help mind to link closely ethical values hidden in these forms to contemporary urban design, to think about the true meaning close to spiritual origin not as a rational choice frozen in discipline and method. The set of universal values rests at first on a comparative study of different ethics to find the common ethical values as a shared background. Secondly, the research detects the common urban characters embodied in different traditional cities over the world recognized as universal flexible urban characters.