Housing sales are down in the Washington suburbs

The number of closed sales was lower in most suburban counties last month, but prices were almost entirely higher.

Long & Foster says the biggest drop in sales was in Loudoun County, down 16 percent from a year ago. Arlington was the only county to see a sales increase, up 6 percent, and remains the region’s most expensive county, with a median selling price last month of $570,000, up 11 percent from a year ago.

Sales in Alexandria City fell 3 percent compared to a year ago. In Fairfax County,…