$6500 Tax Credit - Time Frame

You must have lived in the same principal residence for any five-consecutive-year period during the eight-year period that ended on the date the replacement home is purchased. For example, if you bought a home on Nov. 30, 2009, the eight-year period would run from Dec. 1, 2001, through Nov. 30, 2009.
NP Dodge Real Estate Blog Author - Robert Wiebusch