Informal housing or informal settlement can include any form of housing, shelter, or settlement (or lack thereof) which is illegal, falls outside of government control or regulation, or is not afforded protection by the state. As such, the informal housing industry is part of the informal sector.
To have informal housing status is to exist in "a state of deregulation, one where the ownership, use, and purpose of land cannot be fixed and mapped according to any prescribed set of regulations or the law". While there is no global unified law of property-ownership, the informal occupant or community will typically lack security of tenure and, with this, ready or reliable access to civic amenities (potable water, electricity and gas supply, road creation and maintenance, emergency services, sanitation and waste collection). Due to the informal nature of occupancy, the state will typically be unable to extract rent or land taxes.