I'm not a lawyer, but from way back in the day when I was studying law I think I remember something about having to show that you intended to exclusively occupy the land/building? Stuff like changing locks on doors, putting locks on fence gates, etc. The nastier you got with locking the real owner out, the stronger your claim was. I remember thinking it seemed pretty a*se about face. Anyhow, be interesting to hear what a real lawyer says. Keep us in the loop