Well said Nobrot, I was just going to post a reply almost saying exactly what you have said but you beat me to it.  

If you find an estate agent that you trust and I am more than happy to recomemend ours (please PM me for details) they will give you the releant building and renovation details.  Our agent has lived in the Tortosa area for quite a few years not the usual one or two that some agents seem to have only lived here and then claim to know everything.

Just be aware that, of course, you can't just build anything in Catuluna just as you can't in other areas or other countries.

Debbie :)