We filed a mechanics lien, the owner doesn't care, he said he will pay us through escrow once the house sells, can I send an invoice to the escrow company and add additional late fees and the cost of the lien that I had to do?
Sounds like the property owner may be setting you up for failure. You only have 90 days from recording the lien to file the lawsuit, or the lien will be unenforceable. Civil Code 8460. You should probably consult with a construction law attorney.