can you give me the source off your information please need some context and timescaleThere are still 300,000+ households where nobody has worked - ever. That figure seems to be rising at a time of record employment.
as most houses are single generation for most off the time with parents and children till they leave home
very few will have 3 or 4 generations
remember.where the work is will be where the housing is expensive and out off reach off most
and where the housing is affordable its because there is very restrictive often poorly paid work