Has there ever been a more first world problem than the Sandbanks beach dispute? Sandbanks is the most expensive seaside real estate in the UK. One house that sold for £13.5 million in 2023 is now valued at £8.9 million — a 33 per cent drop in value. Another widespread belief is that the public has right of way over the foreshore regardless of who owns it. AdvertisementEven if it is a grubby triangle of grit and seaweed at the back of a £3.5 million house.