Seventeen young men were found crammed inside a three-bedroom house after a council swooped on a property.
The raid, which took place in Kingsbury, London, last week, revealed the tenants were living in cramped conditions with no hot water or heating. Grimy mattresses were found piled into tiny damp rooms where up to five people were sleeping at a time.
Enforcement officers found the house was scattered with mould and protruding electric cables, while the backyard was filled with household rubbish and old mattresses.
The council burst into the property with help from the Metropolitan Police after previously been blocked from carrying out a raid.
All 17 tenants living there were young men who were paying cash in hand to one person in the house who then passed on the official rent of £1,200 a month.