The Kathmandu Valley has witnessed one of the most rapid urban changes in South Asia, primarily as a result of migration within the valley itself. The purpose of this study is to investigate the ways in which migration, the expansion of informal settlements, and the rise of the construction industry all interact to have an effect on urban vulnerability. PUSH (unemployment in rural regions and a lack of services) and PULL (construction employment and easy access to urban amenities) factors have both contributed to the growth of the construction sector and the expansion of the workforce. PUML (construction employment and easy access to urban facilities) factors have also played a role. In spite of the fact that migrants contribute to the growth of cities, inhabitants are put in danger by shoddy labor and a lack of experience in the construction business. During the course of this qualitative research project, interviews were conducted with thirty construction workers who had a combined ten years of experience. The interviews were conducted utilizing snowball sampling approaches. The purpose of this study was to investigate migration drivers and the significance. By conducting an analysis of literature, policy papers, and field observations, the research investigates the socio-economic variables that are the driving force behind migration, the regulatory loopholes that exist within the construction industry, and the challenges that are associated with the governance of informal settlements. According to the findings, in order to put a stop to the vicious cycle of vulnerability and to promote safe, sustainable, and inclusive urban development in Kathmandu, it is required to implement a coordinated plan that encompasses migration management, housing provision, and the professionalization of the building sector.