Comment by makeitdouble

Yes, I'd totally hate my house collapsing over me and my family because the neighboor excavated the rocks that were keeping my house's foundations stable in place.

I assume heavily changing the water infiltration/leaking paths could also have significant effects on how the ground behaves even outside of the area that is worked on.

PS: My dumb brain 30min after waking up: "surrounding properties" + "value" + "at risk" was the phrase I first read from your comment.