In this research, it was tried to use the experience of building construction and activity in housing projects to identify the reasons for the discrepancy between employers and contractors in Mehr Housing Segment. To collect data, library study method and questionnaire distribution were used among contractors, employers and engineers involved in Mehr Housing Projects. This research is a summary of a dissertation under this title, which was conducted using descriptive survey method. From the findings of this research, it is possible to identify the important reasons for the disagreement and the roots of the lawsuits between employers and contractors in Mehr Housing. The purpose of collecting this information has ultimately been to assist contractors and employers in all disciplines in order to minimize financial damages and consequently increase the quality and efficiency of the specialized forces.