The number of million-euro homes in the Netherlands rose last year by more than a fifth to 65,000, according to property researcher Calcasa.

Although half are detached houses in leafy areas of the Netherlands, prices rose so much in 2019 that Calcasa created a new category of ‘ordinary’ million-euro houses – built after World War II and smaller than 200 sq m.

Many of these houses are in Amsterdam, with 100 in the Prinses Irenebuurt. There, for example, 84% of the homes on the Henriëtte Bosmansstraat are thought to be worth at least a million. Other areas with ‘ordinary’ millionaire house owners are Overveen, Amstelveen and Heemstede, according to the report.

Konijnenlaan in Wassenaar is once again the Netherlands’ most expensive street, while villas in Wassenaar and ‘t Gooi as well as historic canal houses in city centres remain highly-priced. The most expensive neighbourhood in the Netherlands is Diepenbrockbuurt in Amsterdam, with an average house price of €2.43m

The body works out potential prices on the basis of the house size, land plot, building year, type of home and location.

Meanwhile, the number of million-euro homes has trebled in the past six years, the report said.

Since the figures are based on 2019, it has not yet calculated the effects of the coronavirus on house values.