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 final destination of the asset to be evaluated. Closely connected with the first intent, there is a second one, which consists in carrying out a due diligence that may 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 to understand what it will be possible to achieve within it, on the basis of personal needs and urban planning regulations in force.