As the appraisers determine “market value” for properties they use recent sales of properties that are as comparable to your home as possible. However, rarely are two homes “identical”. Therefore, the valuation model makes adjustments to sale prices to reflect those differences. If a house exactly like yours sold, but has a three car garage, and yours only has two… the sale price of the other home will be adjusted downward. This ensures sale prices of comparable homes are properly considered, and reflect an apples-to-apples comparison to your home.