Buildings are demolished uncontrolled without questioning the disassembly and recycling possibilities in demolition activities realized within the scope of urban transformation. As a result of the demolition works carried out mostly by using traditional methods, too much constructional waste is generated and left to nature. This situation causes important environmental and health problems and increases the consumption of energy and natural resources. It is necessary to produce innovative and environmentally solutions in order to reduce the negative consequences of demolition activities within the scope of urban transformation. The concept of deconstruction, which is considered as an alternative for the demolition of buildings, is one of the solutions evaluated in this context. It is possible to eliminate or reduce the negative effects of demolition activities by using building deconstruction methods in the field of urban transformation. However, the applicability of appropriate methods depends on the knowledge of the companies serving in the field of urban transformation about the concept and methods of deconstruction, and their level of having appropriate infrastructure and equipment. In this context, a field study was conducted in order to determine the knowledge levels of firms operating in the field of urban transformation and their general approach to the concept of deconstruction. In the study, questions were asked to company officials with the survey method, the answers were analyzed with the SPSS program, and the findings were obtained by using the frequency and percentage distribution, average and standard deviation values of the answers. Findings were evaluated using the pairwise comparison method. As a result of the study, a general situation was determined about the knowledge and implementation levels of the companies on building deconstruction.