Originally, as a subcontractor, I filed a mechanic's lien on commercial private property in New York County. We are still in the process of negotiations with the owner of the property as time of the original lien is about to expire. I am considering to give the owner extra time without unnecessary litigation, but I want to preserve my rights to sue if the original lien expires. I read that the extension of lien on commercial property can be given for 1 year, but not sure if I have to serve affidavit of service as at the time of the original filing.