Our neighbour has demolished the existing house on the site to build a larger one. The house will be timber frame, like most things up here, so not exactly massive. The footings still have to be 1 metre deep, concrete trench fill, which is probably reasonable on soil. But 3" below the surface here, you hit broken rock and at 6" it's solid granite. So there's been a digger with a hydraulic jackhammer slowly cutting down the full metre through the rock, prior to substituting concrete for granite! Took two days of almost continual hammering.