Nearly two million working young adults aged between 20 and 34 years old in England are still living with their parents according to Shelter, which is urging stronger action to help the "clipped wing generation" fly the nest.
It names Castle Point in Essex as one of the hotspots where 45% of working 20- to 34-year-olds live with their parents
The charity said data it has taken from the Census shows that there are 1.97 million people in this age group in England who are still living with their parents, accounting for one quarter of all young adults in employment.
A survey commissioned by the charity also found that nearly half (48%) of 250 young adults who live with their parents said they do so because they cannot afford to rent or buy their own home.
Campbell Robb, chief executive of Shelter, said: "The 'clipped wing generation' are finding themselves with no choice but to remain living with mum and dad well into adulthood, as they struggle to find a home of their own...
"Rather than pumping more money into schemes like Help to Buy, we need bolder action that will meet the demand for affordable homes and not inflate prices further.