Home buyers need to save for as long as 27 years to get a deposit for a new house in some parts of London.
According to data from Moneysupermarket, this is how long aspiring homeowners in Camden have to wait if they earn an average salary for the area.
Camden homeowners need to save an average £490,738, which amounts to a deposit of 56.6 per cent.
In Kensington and Chelsea, a couple with the average combined salary for the borough (£147,9180) would have to wait 23 years before they had enough for a deposit on a home.
Average house prices in Kensington and Chelsea are £1.3m, and people buying in the area typically put down a 52 per cent deposit, meaning they have saved £688,772.
The analysis by Money Super Market looked at 441 local authorities across the country, and London boroughs made up 16 of the top 20 spots requiring the biggest deposits relative to local average salaries.
|Local authority||Average deposit||Deposit percentage|
|Kensington & Chelsea||£688,772||52|
|Hammersmith & Fulham||£346,866||45|
|City of London||£254,317||33|
Kevin Mountford, banking expert at Moneysupermarket, said: "As house prices continue to rise, the dream of owning a home becomes harder and harder to reach for so many people.
"For those who want to take their first steps onto the ladder, reaching the minimum deposit levels required causes serious financial strain and, as our analysis highlights, many might be priced out of their desired area."