From Longman Dictionary of Contemporary Englishunfit for human habitationunfit for human habitation formalWRONG/UNSUITABLEa building that is unfit for human habitation is not safe or healthy for people to live in → habitation
Examples from the Corpus
unfit for human habitation• Many of the housing projects are unfit for human habitation.• They pronounced the attic unfit for human habitation and Jean-Claude inadequate to support me.• The slums built during the Industrial Revolution soon became unfit for human habitation.• In the 1960s, the flats were declared unfit for human habitation and demolished.• That single room was unfit for human habitation.• The court was told that Blake had charged hundreds of dollars in rent for rooms that were unfit for human habitation. 