By Mike Rosenberg, The Seattle Times
There’s a 2 in 3 chance that a house in King County now costs more than half a million dollars.Home prices climbed more than 10 percent in every county within the Puget Sound region last month, led by especially big gains in the city of Seattle. The median price of a single-family home in Seattle grew 17.6 percent from a year prior, the biggest increase in 19 months, according to monthly home sales data, released Monday.