I called many contractors to find some one to level our house a year or so ago but no one would bid on the job. They were afraid of the liability. Some contractor wanted soil engineering work done with no estimate of the cost of that work, and no assurance that the house could be leveled. I found this unacceptable, so after calling dozens of contractors I didn't like the idea but decided to just live with the problem. There was a difference in the floor height of nine inches and there was no step.
A year or more later Patrick Dunn from TerraFirma called and said he had learned about our house problem from one of the contractors we had contracted and TerraFirma had a solution.
TerraFirma did the job. I am extremely pleased with the work done. The workers went beyond what I expected in every way. They were friendly and polite. Answered all my many questions and work quality was superb as was cleanup each day and at job completion. There was absolutely no problems with the work done. I highly recommend TerraFirma.