Kary has extremely good advice. You are asking legal advice from a community of real estate agents, and we are not legally able to aid you with this sort of question. Unofficially, I suspect you will have to go after the person that owes you the money without the leverage of the home.

All the best!

This is actually a very complicated question (or at least the answer is), and you really need an attorney to help you on this assuming your lien is for a significant amount of money. I'd also warn you that enforcing your lien has some strict requirements, including time requirements, and that would be another reason to see an attorney ASAP.