Real estate appraisal

Real estate appraisal is the practice of developing an opinion of the value of real property, usually its Market Value. (Real estate appraisal is American usage; many other countries use the terms property valuation or land valuation.) The need for appraisals arises from the heterogenous nature of property as an investment class: no two properties are identical, and all properties differ from each other in their location - which is the most important determinant of their value. So there cannot exist a centralised Walrasian auction setting for the trading of property assets, as there exists for trade in corporate stock. The absence of a market-based pricing mechanism determines the need for an expert appraisal/valuation of real estate/property.
See more at Wikipedia.org...

An estimate of the value of real estate property using various methods.