This document provides an overview of principles of property valuation. It defines key terms like valuation, cost, price, and value. It describes the objectives and purposes of valuation and the roles of valuers. It discusses different types of property values like market value, realizable value, and liquidation value. It also outlines factors that affect property values such as economic, legal, physical, and social factors. Finally, it describes the three main approaches to property valuation: income approach, market approach, and cost approach.