Many new builds may be badly built, but this is a policing, not regulation, issue. If they are built to code and current regs they will last 100 years. They are being badly built in places because there isn't a building inspector round every day kicking arse. The cheap housing of the interwar period is now generally OK because all the crap has been demolished, fallen into disrepair or been repaired at some point in the last 80 years.Probably better than the "homes" many vulnerable people are forced to live with mould and leaks and so on, not forgetting the number of souls being forced to live on the streets. Many new builds are awful and unlikely to last 50 years, the best affordable housing was probably built from the 1930s to the 1970s with the exception of prefabs and some high rise.