There is no common law in Nevada. If he is trespassing on property that is yours, you might file for a restraining order. If property is in your name, he has no right unless he can prove some implied or written contract between you for reimbursement or payment for work performed. If you two have come to an agreement, and it is in writing, either can file against the other to enforce.
Answered on May 27th, 2013 at 4:01 PM