I have a contractor who threatened to place a lien on my property due to non final payment. Contractor finally completed the project in which I was promised in writing it would take one month to complete (contractor was 5 months late). Contractor also stated in writing he would deduct $100 per day for every day he was late in completing the project. I received the final bill and the $100 per day deduction was not included. I explained that to the contractor I was not going to pay the billed amount without the $100 per day deductions; however, contractor is disputing the claim and is now threatened to put a lien on my house. Can this contractor place a lien on my house for the billed amount/non final payment?