Why get a professionally internationally qualified valuer to value a property?

Because they are not going to risk their whole career and reputation by just writing down the value the client states. Survey Spain’s valuers give their opinion of market value, generated in isolation of the effect on the client, as they know that other parties might be affected by it.

If the client changes the value without agreement of the valuer, it’s not the valuer’s opinion and shouldn’t have their name attached. If the client or anyone else brings forward market information that changes the evidence and therefore the valuer’s opinion, then it’s correct for the value to be changed. The valuer should go to the whole market evidence and not be selective to provide a value that suits their client. That’s not an open market value that would be applied by a knowledgeable buyer. The IVSC and RICS have a definition of market value and that must be the one that’s stuck to. Otherwise, the client might as well use a random number machine.

The estimated amount for which an asset or liability should exchange on the valuation date between a willing buyer and a willing seller in an arm’s length transaction after proper marketing and where the parties had each acted knowledgeably, prudently and without compulsion.