While such work is not cheap, Terra Firma stayed with us throughout, including during some delays based on obtaining permits here in Oregon, so that wasn't their fault. The work was outstanding, with a three-person crew putting in three very busy days in cold and wet weather to drive 17 reinforcing titanium piers around roughly half the perimeter of the foundation, with most of them extending clear down to bedrock. They also managed to raise both sliding corners of the house, from slopes of about 1.5" (4 cm) on either corner, back to their original level, which amazed us (we were hoping to have just stabilization, with the possibility of raising the foundation just partway). The house sits on a very steep slope leading down to a creek, and years of slow but noticeable "sliding down the hill" are now not only corrected, but the whole foundation is now as level as when it was constructed 25 years ago. Perhaps needless to say, we're thrilled with the results. Contact Mike O'Brien at their Roseburg office near Eugene to get started: the company will do laser-specific measurements of your building to see if its base is off at all. The staff also does NOT engage in high-pressure sales tactics, so rest easy if you have him or someone else come over for an evaluation.