Found great duplex but...foundation has some settlement

[Jose Casanova]

Hi everyone, first time posting (newbie here). After the original offer fell through, I'm next in line (back up offer). Just came back from seeing the property. Property is good overall, only issue is that the foundation is settling in one of the units. It's a two-story duplex and one of the corners (kitchen floor) is settling a couple of inches. It's a concrete slab.  Property is about 30 years old so I don't think it will settle anymore, but I'd like to fix it. I guess the proper way to do this is to reach out to a civil engineer, but wanted to know how expensive these repairs might be. Order of magnitude...is it in the $5k - $10k range? $10k-$15k? $20k + just trying to get some idea so I can run my numbers again and negotiate the price again. Appreciate any suggestions on how to proceed. And any potential ranges based on your experience. Thanks in advance!