Can a mechanic lien be placed on my property without a signed contract? I live in Colorado and the project was over $500. To start from the beginning my roofer started the process to replace my roof in August 2019. They were suppose to replace the shingle roof, gutters and metal parts of my roof. They only completed the shingle and gutters and tried to put metal on but did not know how to do it. They stopped trying to put metal on it and let me house sit without a roof since Jan. (I still don't have a completed roof.) I have had to hire another company to complete my roof. Now the old company has filed an intent to put a lien on my house for the full amount that they never finished. I offered to pay them the amount they did finish but they want the full amount. Can they even put a lien on my house without a signed contract?