It’s worth noting that this was possible because the player in question used a special crown store housing plot and used a truly absurd number of decorations to make a shack, which is a bit like buying an Aston Martin because you need a radio. Still, it’s an impressive testament to what can be done with the game’s housing system, and if you want to buy a huge plot just to build yourself a tiny shack in the sky, who are we to stop you?
Elder Scrolls Online Homestead home built with only decoration items!
Source: Reddit; thanks to Daras for the tip!