Tenant wanted to build apartment in my barn. I wanted a toilet, shower, and bedroom in there for my own use when I am there. So I said ok. He said he would pay for all materials and provide all labor. He built an extravagent apartment thinking he and his wife would someday buy my property and live there themselves, renting out the other houses. Since then his wife has died and he learned he could not buy my property because I am not ready to sell it. Meanwhile against the rental agreement he has been subletting the apartment for $500 a month to an uncle who helps him with his 3 kids. Over the course of the project he asked for me to help out. I twice gave him $2500 he was supposed to pay back. Since he can't buy the property and will now have to move out, he is threatening to put a lein on my property to get compensated for "ALL OF THE MATERIALS AND LABOR" he has put into the property. We never had a contract. I never agreed to pay him anything. I never had any control over what he chose to build in the barn. I have never even seen it, and he did not bother to get any permits for any of the work he did. Can he put a lein on my property? He is not a contractor.