I was hired by a property mgt company in Washington State to build a deck on a property they managed. I provided an estimate that stated that the job would proceed on time and materials. upon completion the invoice was more then the estimate because of increased scope of work. The mgt company said I did a great job but the property owner refused to pay the additional cost. I have never had any contact with the property owner. I filed a lien against the property as my only option. The property mgt company says they are not responsible because they were acting as an agent of the property owner.