I am a contractor on a small residential home. I was renting the home but it was uninhabitable. It was leaking from the well head into the bedrooms and the plumbing did not drain due to no venting installed. The electrical was hanging out of the ceiling and walls. And black mold was all over inside. The landlord agreed for me to make repairs to the property as I lived there. I still paid rent with the agreement that she would pay for all the repairs. I funded all necessary materials and labor to bring the property to code and make improvements. All on the landlords directive. Once complete she filed for eviction and refused to pay.
You should consider preparing a letter to mail by certified mail, return receipt requested, to the owner to set out the facts and to demand the relief that you want. Make sure that your letter is professional and business like as it may be evidence later. Attach to your letter support for your claim, and photographs of your completed work.
If need be, consider filing suit in small claims court (assuming that your claim is less than $20,000), using your letter as evidence.
You may have mechanic's lien rights. You really should retain a construction attorney to review and evaluate your legal position based on the contract and pertinent documents. The right to be entitled to file a mechanic's lien is set out in Texas Property Code Chapter 53, and you really need to make sure that if you file a lien, you have properly and appropriately done so.
Good luck.