I'm not sure what you are asking or saying? Are you the owner of the property? Or are you a mortgage note holder or lien holder for the person that is the owner?
If you own the property, then yes, you can consider getting a HELOC on it. If you are a lien holder, no, you cant get a HELOC against a property that you don't own.
I'm not sure if I understand your question, I apologize if I have interpreted your question wrong?