Hi. I think the best advice is to hear what the agents say, but check out what they tell you at the local adjuntaments office.
They will tell you exactly what you can and cannot do on any piece of land providing you give them the polygon and parcela number.
They are the only people who will give you the truth.. Also use a solicitor, agents will tell you, you don't need one, but I think most people here would say, you might live to regret it if you don't.
I'm living here and loving it, so good luck with your search [smiley=vrolijk_26.gif]