We hired a contractor to pour our concrete slab. He came to see the site, received a copy of the site plan and specs relating to the slab. Later, he texted me a price. I even met with both him and the steel building contractor who would be erecting the building just 2 weeks after the price. This was in June, in the end of September, the job was finally finished [not due to our delays, but his]. At no time during this entire 3 month period did he attempt to tell us that he needed to renegotiate the agreed upon amount or that it would be higher. He was billing on a monthly basis, which we paid quickly. I was keeping track of the bill totals. His final bill was $4700 more than what we agreed to pay. Once I emailed him and said we never agreed to a new amount, he made all kinds of excuses. I have documentation of all of these amounts [in both texts and emails]. My question is if he attempts to file a mechanics lien, would it stand?