The data also shows that new home sales were down 8% from a year earlier and second hand homes up by 16% which could be good news for those who have been unable to sell.
The biggest annual increases in May were in the Balearics with a rise of 33.1, Cantabria was up 30.4%, Andalucia was up 10.7% and Catalonia was up 3.1%.
The biggest decreases were reported in Castilla-La Mancha with a fall of 15.2%, Galicia with a fall of 6% and Comunidad de Madrid was down 5.5%.
Meanwhile, the latest figures from the General Council of Notaires shows a sharp rise in the number of Chinese buyers in Spain, suggesting that they are responding to the golden visa rules which grant citizenship to non European Union nationals who invest a minimum of €500,000 in real estate.
Looking at non-resident demand for Spanish property in the first quarter of this year broken down by nationality, and comparing it to the same time last year, Chinese demand increased by 666%.
But Mark Stucklin of Spanish Property Insight pointed out that while no other country comes close, it has to be said that Chinese demand started from a low base of less than 10 sales in the first quarter of 2013, rising to 69 sales in the first quarter of this year.
The next best performer in terms of non-resident demand growth since the Spanish Golden Visa scheme came into force last year was the United States with an increase of 143%.
The only other country with an increase of more than 100% was Argentina, up 115% to 28 sales, once again starting from a very low base.
Big increases in purchases by non-residents from countries outside the EU are likely to be driven by golden visa buyers. ‘However, the Spanish golden visa scheme has not been a great success since it was launched last year, partly because it is still early days, but mainly because competitors like Malta and Portugal offer more attractive golden visa packages,’ said Stucklin.