Rising house prices in 2013 'create another 100,000 millionaires' Much of the strong demand in the London market is from wealthy overseas buyers looking for a safe haven to put their cash. This market is likely to cool in the coming 18 months after the Government announced plans to impose capital gains tax on property sales by non-UK residents from April 2015. The highest proportion of property millionaires outside the capital can be found in the Surrey postcode area of GU25 covering Virginia Water, where almost one third of homes were found to be worth over £1m. Areas with the highest proportion of property millionaires outside of London Virginia Water (GU25) Beaconsfield (HP9) Chalfont St Giles (HP8) Hartfield (TN7) Gerrards Cross (SL9) Radlett (WD7) Guildford (GU5) Henley-on-Thames (RG9) Ascot (SL5) Harpenden (AL5) On a regional level, Wales had the fewest property millionaires in Britain, numbering just over 1,000 in total, but this number was up 24pc on 2012. Number of property millionaires by region London South East England East of England South West England North West England West Midlands East Midlands North East England Yorkshire and the Humber Wales Lawrence Hall of Zoopla.co.uk said: "While Government schemes such as Help to Buy have concentrated popular attention on the lower rungs of the property ladder this year, there's been a hive of activity propelling house price growth at the top-end of the market." Don't miss: House prices: What will happen in 2014?