The main issue here is understanding what is the actual cause of the sinking: 1) extensive dewatering of the soil under the building and around it 2) some mis

The main issue here is understanding what is the actual cause of the sinking: 1) extensive dewatering of the soil under the building and around it 2) some mistake in the calculations of the project and/or some foundation work made in difformity from the project 3) a combination of the two IF it is only #1 (this is what the builders say) then stopping the water drainage or even (in certain case) re-watering appropriately the soil would stop the sinking (at a relatively low cost). IF it is #2 or #3 it is certainly possible to "better" the soil underneath or "add" some (underground) supporting structures (at a much, much higher cost). And of course someone will have to pay the bill. Techically, IF the cause is #1, it is called "subsidence": https://en.wikipedia.org/wiki/Subsidence https://en.wikipedia.org/wiki/Subsidence more specifically: https://en.wikipedia.org/wiki/Groundwater-related_subsidence https://en.wikipedia.org/wiki/Groundwater-related_subsidence Edit: P.S.: Seemingly the SF Millennium got just cited here also: https://en.wikipedia.org/wiki/List_of_leaning_towers https://en.wikipedia.org/wiki/List_of_leaning_towers (maybe exaggerating a little bit, look for Santos, Brazil, strangely not listed in the wikipedia page)