If the Estate Agents and the owner of the property want a sale then they should pull their finger out and present you with all the correct paperwork. Why should you be doing all the work? Tell them there are plenty of other properties for you to look at. If they can't be bothered to get the correct paperwork for you to prove that this is a legal dwelling and not just an almacen then they are clearly trying to hide something. By all means buy your land with almacen if that is what you want but do it with your eyes open to what this means and pay for what you get i.e. agricultural land with an almacen ( store ) that you may be able to do something with and not a house with a cedula that will clearly be worth much more.