@terrygrundy I just took a dive into a paper about coastal erosion in that area, and discovered that on average the cliffs retreat by 0.2 m to 0.3 m (one foot) per year. But some places remain relatively stable for years, while there are sudden collapses that measure one to tens of meters/yards. A house like this could disappear in one fell swoop, without warning. I'm not surprised it's been abandoned!

Oh, and great photo, by the way!