I am not an expert on soil, but I am familiar with that situation because we have to deal with it. The permafrost layer is supposed to be frozen permanently, but the ground moves. It seems that this melting is being caused by climate change. Because of that, the houses, which are built on pilings, are much more unstable.
We build a pad that is made up of several layers of various substances such as sand and rock, and the homes are built on those pads. Before now homes did not move very much, but we now see that some new houses have already moved. The structure of homes that are only two years old has already moved. You can see that on the inside.