We are the Company that was responsible for the build out of a store. The GC we hired managed his own sub contractors while we were the suppliers of the Millwork and hired other contractors directly. We have signed an additional Agreement on Feb 1st with the owner of the store to build and install an ADA counter required by the city and close the permit and obtain CC for the store against payment of the outstanding balance on the contract. We have fulfilled both these obligations the first for the ADA counter on Feb.9th and closed inspection and permit with final issuance of CC on the 28th of Feb. However the store owner does not want to pay. Can we file a lien for the work we did? Thank you