Prime minister David Cameron angered the French last month when he said he would 'roll out the red carpet' to wealthy French citizens and firms who wanted move out and pay their taxes in Britain
The latest estate agency figures have shown large numbers of France's most well-heeled families selling up and moving to neighbouring countries.
Many are fleeing a proposed new higher tax rate of 75 per cent on all earnings over one million euros. (£780,000)
The previous top tax bracket of 41 per cent on earnings over 72,000 euros is also set to increase to 45 per cent.
Sotheby's Realty, the estate agent arm of the British auction house, said its French offices sold more than 100 properties over 1.7 million euros between April and June this year - a marked increase on the same period in 2011.
Alexander Kraft, head of Sotheby's Realty, France, said: "The result of the presidential election has had a real impact on our sales.
"Now a large number of wealthy French families are leaving the country as a direct result of the proposals of the new government.
"These properties are then bought up by foreign investors looking for a stable real estate market like France to invest in.
"It shows the high-end property market is holding up very well, even in these difficult times."
Gilles Martin, a Swiss tax consultant, reported the same trend. "Since the socialists came to power in France, I have been deluged with inquiries from rich French people who would rather pay their tax in Switzerland," he told Switzerland's 20 Minutes newspaper.
A report earlier this year by London estate agents also showed France's richest people were heading to Britain to escape new higher taxes.
Inquiries from wealthy French for London homes worth more than five million pounds soared by 30 per cent in the first three months of this year, UK estate agency statistics showed.
And interest in homes worth between one and five million rose by 11 per cent, it was found.
British estate agent Knight Frank said the tax plans had sent French interest in luxury London homes rocketing.
Liam Bailey, Knight Frank's global head of residential research, said: "It is too early to see the impact of the proposed wealth taxes in France in terms of actual purchases in London.
"But there is strong evidence from our web search statistics.
"This evidence from web search activity backs up a noticeable spike in anecdotal comments from our office network, where French applicants have become much more noticeable in recent months."
Prime minister David Cameron angered the French last month when he said he would "roll out the red carpet" to wealthy French citizens and firms who wanted move out and pay their taxes in Britain.
He told the B20 business summit in Mexico in June: "I think it's wrong to have a completely uncompetitive top rate of tax.
"If the French go ahead with a 75 per cent top rate of tax we will roll out the red carpet and welcome more French businesses to Britain and they can pay tax in Britain and pay for our health service and schools and everything else."
Francois Hollande only got elected on the 6th of May, so I am not sure if the figures for April also is a true reflection of a "socialist" president in power.