I would certainly second what Gary has said re 'permissions'.  We have been very careful to get everything for our mill checked & double-checked  and yet still we find that there is more to be done.  Fencing permits are next.  The Agents Rural stopped by a couple of days ago when PB was putting up a chain across our drive and said (in my words obv) "you need a permit for that!".  PB explained that no other property than ours was involved and they were satisfied, and also very friendly.  But it goes to show that they do know what people are up to and I'm afraid that there is no 'getting away with it' any more.

Certainly I would imagine that if you are going to site a large caravan on your property in which to live, you will need to check with your local Adjuntament that it is ok.

PG