The homeowner vacancy rate was 2.9% in Q4 2008. A normal rate for recent years appears to be about 1.7%. There is some noise in the series, quarter to quarter, so perhaps the vacancy rate has stabilized in the 2.7% to 2.9% range.

This leaves the homeowner vacancy rate almost 1.2% above normal, and with approximately 75 million homeowner occupied homes; this gives about 900 thousand excess vacant homes.