I got a quote from a previously used contractor for installing a door, fixing a cement floor, and install molding. $1,080 quote. B/4 the work was completed I paid 100% of the invoice. At the same time I asked him how much for installation of 4 windows. He said $300. I bought the windows & all materials. On day 17 of a "4 day job", he gave me an invoice for the windows for $1,153. I said you gave me a quote for $300. He said it took longer than what he had thought (and the work was still not completed). I offered him $500 to go away. He agreed. The next day I had 2 contractors in to give me an estimate to finish the work. I then found out that most of his work was shoddy and not to code. I stopped payment on the $500 check. He is now threatening to file a lien for $1,153.