I used to live next door but one. I built a road next door through swamp land. I think this was owned by a friend from Sheffield who was a builder. At one time it was built with bricks at one side, warned by locals not a good idea. Next winter I saw water flowing in and out of the bedroom window it had sunk. This was in late 60,s or early 70,s. I belive it was pile driven to 60 feet but nothing firm found.