House-Less are those who renounced their fealty to a house, cutting ties with either angels or demons. It's something ilegal in Limbo and those who renounce are obligated to find another means to survive curfew. Most of the House-Less live in the sewers.
There's not much history about people being House-Less on Limbo. This is because of The Purge that occured 80 years ago. Since then, this movement has regained interest by few new mortals of Limbo.