A "chronic" shortage of affordable homes or choosing to move closer to family are cited among the reasons for the rise in more adults living at home in Suffolk.
There are more non-dependent children living at home in 2021 than in 2011 in all areas of Suffolk, the Census has recently discovered.
Figures released this week have shown that there are more adults living with a parent or guardian in 2021 compared to 10 years prior.
Mid Suffolk saw the highest percentage rise, with 18.5 per cent more adults living at home with family members, closely followed by Babergh which saw a rise of 18.3 per cent.
Ipswich also saw a rise of 12.4 per cent of adults living with a parent or guardian at home, with East Suffolk rising by 11.9 per cent.
West Suffolk was significantly lower than other areas of Suffolk, but still saw a rise of 5.8 per cent.
Peter Ogilvie, head of residential sales at Savills in Suffolk, said: "It may be that younger people who were living in towns and cities decided to return to the family home, wanting to be close to parents and siblings and live somewhere with a bit more room, surrounded by lots of open space.
"The rise in home working also made this a lot easier.
"Interestingly, however, what we’ve been experiencing over the last year is a reversal.
"It’s not quite as sudden as it was during the pandemic, the rise in property prices that we’ve experienced and increased cost of living may well be preventing some from making an immediate return, but there is now a definite drive back towards more urban areas."
Councillor Neil Macdonald, Ipswich Borough Council portfolio holder for housing, said: "It is no coincidence that the areas with the most non-dependent children at home are also the areas that have the highest house prices.
"In Ipswich, there is a chronic shortage of properties that are affordable to rent or buy.
"This especially hits people looking to move to their first home of their own."
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