Every Residential, Commercial, and Industrial building (RCI) has the potential to improve. All buildings have a density level that tracks how happy and prosperous its residents or workers are. Each building also accumulates value over time. The value measured depends on the type of building, A building can evolve through its density, or value levels.
A tiny house can eventually turn into a mansion, or a small clothing store can become a larger chain. Select any RCI structure or check the different data maps to view a building’s density level. Passing a tier doesn't guarantee a structure’s renovation, but reaching that level increases the chance of this occurring.