With real estate valuation, we set ourselves the goal of determining, as a main purpose but not the only one, an asset element of the property, generally consisting of the market value, but which may be different from the latter depending on the purpose of the evaluation activity and the type of property to be evaluated. Another goal, closely connected with the first, is to carry out a due diligence that can concern different areas (urban-technical-cadastral), depending on the assignment received. The key thing is not to formalize a purchase, often carried out only out of empathy towards the property, but understand what will be possible to achieve within it, on the basis of personal needs and urban planning regulations in force.