 The average apartment rent in the D.C. metro is up a little more than 2% from a year ago. That doesn't sound like much, but it's twice the national rise. The average two-bedroom in the D.C. metro is now $2,400 a month, but you can double that for newer buildings in top locations. Northern Virginia's office vacancy rate rose to 24% in the second quarter. CBRE does say most lease renewals in Northern Virginia were not downsizing.