I have some experience with housing social projects in Brazil. And it was a big problem that the ones with most need for a decent house were exactly the ones with illegal settling. Illegal settling is a danger in itself, because in real life for this families is understood as "temporary settling", as there are no formal guarantees that you stay there 5 years from now. And there is no more overlooked place (in maintenance, decoration, care, government accountabilty) than a temporary home. But, in practice, these poor families stay there for decades.
So the combination of the temporary mindset with permanent stay create horrible places to live. And that excluding the risk that a house built today might actually be taken from you tomorrow. But my deepest point is that even is not taken from you in decades, illegal settling is still a dangerous problem.
How do you deal with that?
Edit: aslafci (who answered this question below as a cofounder) comment is dead. Just FYI. Her answer is:
"aslafci 4 minutes ago [dead]
hi soneca, Great and important point that is top of mind as we scale. The homes are built on land that was granted to our nonprofit partner from the Haitian government for this purpose. Families will not only own the physical structures but the land it sits on as well. Alexandria (New Story Co-Founder)"