All activities, including the economy, government, and other supporting activities, are centered on urban areas. Human activities have both positive and harmful impacts on the urban itself. One of the impacts is the development of built-up land, which will impact temperature changes. Within eight years, 500 ha of irregular settlements have emerged. This research, therefore, aims to analyze the level of built-up land (NDBI), vegetation density (NDVI), and surface temperature level (LST), which then built-up land and vegetation density to LST would be correlated. The method used in this study was descriptive, describing vegetation density, built-up area, and surface temperature, as well as the correlation between built-up area and vegetation density on LST, conducted descriptively. The findings revealed that while built-up land was directly proportional to changes in LST, vegetation density had an inverse relationship with those changes. In other words, the higher the available vegetation density, the lower the surface temperature. Indirectly, vegetation density has numerous benefits, one of which can affect temperature, especially in urban areas. Additionally, the relationship in built-up land was directly proportional to LST, where the higher the built-up area, the higher the LST. In this situation, many built-up areas use materials to store heat and cover the ground surface, especially in urban areas.