An Investigation on factors and effective causes on unauthorized constructions (Case study: Qazvin city)

 Controlling urban construction for balanced and optimal city development and mainly be done through urban construction regulations.Failure to implement many of these rules and regulations has led urban management to various measures, such as continuous control of construction, establishing legal enforcement guarantees for compliance with regulations and fines. However, despite the control measures taken by the city administration, and in particular, the Qazvin municipality the legal authority is the implementation of construction regulations and supervision of urban construction. Every year, significant instances of construction violations are reported in Qazvin. The required data of the present study were collected through library studies and documentation. Descriptive statistics were used to describe and interpret the data and information. The results of this study were used to show the findings of the GIS and the questionnaire. This research was aimed at Understanding the nature of economic violations and considering management solutions in Qazvin is based on a better understanding of the status quo, while analyzing the trends of construction violations and recognizing the factors affecting it. The method used in this study is documentary study, survey (questionnaire and interview), and field observation. The results obtained from the survey show that both communities of research, unauthorized construction affect the urban texture disorder. Also, the findings of the ways of reducing violations of construction show that the reduction of licensing formalities by 7.29%, the control of the municipality control unit with 7.10%, the supervision of 6.95% of construction supervisors identified the most important ways of reducing violations of construction, finally, An operation is in place to control unauthorized construction according to expert opinions.