What term describes illegal makeshift homes built on rooftops?

The term used to describe illegal makeshift homes built on rooftops is commonly referred to as "cage homes." These are minimal, subdivided spaces meant to accommodate individuals in urban settings where housing is scarce. Cage homes are typically found in densely populated areas, particularly in regions experiencing significant housing shortages. The other terms listed serve different purposes: shanty towns refer to settlements of poorly constructed homes typically found on the outskirts of cities; squatter settlements describe makeshift homes established on land without legal permission, but not specifically on rooftops. Therefore, the answer "cage homes" aligns with the specific context of the question regarding rooftop accommodations.