A teardown sale is a property that is bought for the land, with the older (and typically smaller) home on it being demolished for new construction. Analysts will study sales over the last five years to see if they are the result of teardowns. If a teardown sale is found, it is deleted from the sales comparison model and therefore will not influence the valuation of the larger homes. All home sales that have been purchased for teardown purposes will be excluded from the overall sales pool to ensure uniformity and fairness.