Also forgot to mention if you buy an illegal build (Almacen with a kitchen, bathroom and bedrooms) and the Government department are made aware of your property (dont upset your Spanish neighbour or he will report you) Do you think the Government will prosecute your local Mayor who turned a blind eye to the build NO. Do you think they will prosecute the builder NO. Do you think they will prosecute the Agent who told you all was ok NO. Do you think they will prosecute the Notary who did the paperwork and conveniently left the room while the black money was handed over NO. BUT THEY WILL PROSECUTE YOU.  Should you fight it NO - if you do you will just be throwing away more money as you will not win, they will not listen to anything you say - you have an illegal build and therefore have broken the law - you will have a fine which could be up to 100,000 euros. My advice go to France.