Sustainable land use in an urban area is the fundamental need of the day for planned urbanization. To estimate urban land use, GIS uses the past two decades’ data to map the total change in land use patterns, changes in land surface temperature, and changes in vegetation cover in the city. Meanwhile, multilinear regression analysis was used for economic and social sustainability measures. For environmental sustainability, the study used land use classification and GIS analysis, including measurement of land surface temperature (LST) and Normalized Difference Vegetation Index (NDVI), while the revised master plan, urban newspaper, and public opinion were used as secondary data to estimate socioeconomic sustainability measures. The regression values for socioeconomic sustainability measures through the coefficient of regressions R = 0.745 and R = 0.991 show the alarming situation of sustainability and its challenges. The research concludes that there is a lack of planning in urban land use and city expansion, which poses major threats to urban development and sustainability in the region. It is recommended that the relevant authorities, for example, Capital Development Authority, should focus on the implementation of a revised master plan to regulate unplanned urban expansion for city sustainability.