Human being, since its existence, feel the need of classifying the assets and objects around itself in order to understand the environment that it lives in. A person, use the distinctive differences of the objects while classfying process that the person needs. These distinctive differences can be, the beautiful and the ugly, the good and the bad, the rude and the elegant and definite amount of definitions like these. In this research, "the beautiful and the ugly" are chosen as a basis and the explanation of the meaning of an architectural product has been argued. The argument in question explains, does the acceptance of an architectural product depends on that it is beautiful or ugly, can an architectural product be called as beautiful or ugly by the definitions of these concepts, can the "Main Designing Principles" and "Principles of Gestalt", which are effective in creating an architectural product, be used to define the product as beautiful or ugly, in another way to ask, can the definitions of beautiful and ugly be used for an architectural product in a normative way. The main concept of architecture is the period of creating buildings and places for people. In this period, different parameters are being effective on an architectural product's position. Finding the beautiness is the most influential point among these parameters, the main result of the applications of beautiful designing principals while the production process continues, the final product will be beautiful and aesthetical in the end, which is a main acceptance. However, in this research, on the contrary of these main acceptances, the definition of "ugly" is created by taking "The Main Designing Principles", "Principles of Gestalt" and emotional reactions as a basis in the designing period of an architectural product. The ability of producing an architectural product via the definition of "ugly", which has been created, is researched. The research was made by Karadeniz Teknik University, faculty of architecture, 2013-2014 fall semester, project-5 class. The subject of "a nightclub with a definition of ugly" was given to the project group. In this context, this research contain the results of the notional definitions of the concepts of ugly, beautiful and aesthetical with the studies of the group mentioned above. The purpose of the study is to research of the feasibility of an architectural product's aesthetical values can also be done via the definition of "ugly" in the designing process of a finished product.