New Iberdrola supply – what is the ‘expedient’ builder no.? Favourite Spanish Property Insight › Forums › Spanish Property Forums › Real Estate Topics, News & Discussion › New Iberdrola supply – what is the ‘expedient’ builder no.? This topic contains 0 replies, has 1 voice, and was last updated by Anonymous 9 years, 6 months ago. Author Posts May 13, 2009 at 8:39 am #54985 AnonymousParticipant I have recently contacted Iberdrola to arrange the initial electricity connection for my new house and they have requested the following: In order to make the new contract we need you to provide us with the “expedient” builder number. You can get this number from the electrician or the builder. Can anyone please explain what this number is and where I could obtain it from i.e. is it on any official paperwork , as I am having difficulty getting a response from the builder. Thanks. Author Posts The forum ‘Real Estate Topics, News & Discussion’ is closed to new topics and replies.