Do I need to file a mechanics lien? Or do I need to do some other kind of contract agreement. I did some construction work on my friends house a couple years ago and he was going to pay me when he was able to get the money to do so. He has decided to sell his house and I want to make sure to protect myself for the monies owed to me and I was wondering if a mechanics lien could be filed so that the title doesn't get transferred until my bill is satisfied.