Existing owner-occupied homes were 6.0 percent more expensive in August than in August 2015. This is the biggest increase in 14 years. House prices have been increasing since June 2014. House sales have increased with 21.3 percent to 132,910 houses in the first eight months of this year. This is evident from research on the development of residential house prices and conducted by the Central Bureau of Statistics (CBS) and the Land Registry (Kadaster).