A lot of builders don't bother getting the "footings repinned".
Normally, the surveyors mark out the locations of the corners of the house using pins or stakes, then the footings are poured and you hope that either the footings are in the exact correct location, or that the pins are sticking out high enough to show above the concrete of the footings AND they haven't moved at all.
What's the big deal? Well, if the "as built" survey showing the actual wall location is off by as much as an inch, it can be a serious problem. At best, the site can be shut down and we visit Committee of Adjustment - at worst? Let's not think about that.
So I always have the surveyors come and set new pins in the solid concrete footings for the exact location of the walls - a simple, cost effective step that can prevent a lot of headaches!
