This document discusses property valuation. It begins by defining valuation as judging a property's present value based on utility, location, amenities, supply and demand. Cost is the amount spent to acquire a property, while value is the estimated sale price between a willing buyer and seller. For a commodity to have value, it must have utility, be scarce, and be transferable. Valuation is done for various purposes like buying/selling, loans, taxes, and more. Key factors that affect a property's value are supply and demand, location, features, condition, improvements, age, seller motivation, and marketing. The document outlines principles of valuation and factors that should be considered when assessing a property's fair market value.