Urbanization is a quite natural process and a reflection of signature of human culture. In every parts of the world this process is continuing unabatedly that started since time immemorial. Urban growth is related to the urban sprawl is the result of extreme population pressure within the urban centre and man’s desire to live in cities or adjacent to the cities but very limited space in the city heart that already facing over congestion. When a ‘formal’ space is converted into a ‘functional’ one many changes occur that can be visualized from the external changes that is the manifestations of the internal intricate socio-economic forces. In this respect land use & land cover changes are very vital that needs an attention to the scholars of all disciplines. The present study is concerned with the assessment of the trend of urban growth and its effect on environment in Rajpur-Sonarpur Municipality of South 24 Pgs, West Bengal. This is one of the fastest growing municipalities of the world. In this study GIS and Remote Sensing techniques have been used to show the built up area of the study area and to detect the growth of urban area in temporal scale. With the help of indexing approach the impact of urban growth on various individual components of natural environment is also studied through this study. In this study it is observed that land use and land cover of the area have changed a lot due to extreme pressure of population, degradation of vegetation coverage and unplanned urban growth that needs proper monitoring and planning to control future hazards related to urban areas.