If you want a house to be able to exist for 1000 years without human contact, you should look at neolithic burial chambers, e.g. long barrows[0], and copy their

If you want a house to be able to exist for 1000 years without human contact, you should look at neolithic burial chambers, e.g. long barrows[0], and copy their construction. If you want a house to be able to exist for 1000 years with human contact, then the only thing you need is for the humans to care and to proactively fix problems as they happen. [0] https://en.wikipedia.org/wiki/Long_barrow#/media/File:Wayland_Smithy_Long_barrow.jpg https://en.wikipedia.org/wiki/Long_barrow#/media/File:Waylan...