Posted: Wed Apr 25, 2018 11:08am
In order to increase the available power supply to your house (over and above the amount contracted for at the moment) yes, you will need a 'boletin', prepared and signed by an electrician who is authorised by Iberdrola to do so.
Many consumers have been caught out because their house has historically been drawing more power than they are contracted for, which wasn't a problem until smart meters came along.
In answer to your last question, yes, you will need a 'boletin', but so far as regards the cost of updating your installation and issuing the document, obviously different electricians will quote different figures, and may have differing views on how much work needs to be done.
But I think that first of all you should ask the estate agent why you weren't informed of this issue, and whether the vendor will be paying for the upgrade.
Geoff.