A fifth of parents who moved house in the past few months wanted a bigger home because their children are staying with them until their late 20s, according to a new study.
A survey of almost 13,000 adults by the Royal Mail found that 21% opted for a larger property to prepare for their children staying with them into young adulthood.
Half of those questioned said they waited longer than they wanted to move house, mainly because of a shortage of suitable properties.
The research was among people using the Royal Mail's redirection service.
Andrea Martin, Royal Mail's managing director of data services, said: "It is interesting to see so many people buying larger properties in the expectation that their children will be living with them longer into adulthood.
"Alongside this, patience is proving a virtue in the house-buying market with people prepared to sit it out to find the right home for them."