What if I want to rent out my Spanish property?
If you possess a property within the Valencian Community -the provincies Alicante, Valencia or Castellón- and you want to rent out your property, then you are obliged to register this property.
Rental Spain – how to register your property?
In order to register your Spanish property for rental, you need to fill in a form called Declaración Responsable which you can download http://www.gva.es/downloads/publicados/IN/25082_BI.pdf
You need to specify the category of your property, choosing between (S) (Superior), (P) (Primera=First) or (E) (Estándar=Standard)