Homebuyer Tax Credit I know the rule regarding building a house or having a contractor build the house the closing date of the house is considered the date that you first move into the house. And the date for this $6500 tax credit needs to fall between Nov. 6th & June 30, 2010. But what about a prefab house. Is it any different. I have a client that purchased a prefab which was delivered and set up. They didn't get the keys to the house or could move into the house until after Nov. 6