@UCDreezy Households are not saved to your account. When you first create them in CAS, the game (usually) saves them to your library. Also, the played household will be present in your saves where they show up in the house you assigned to them in manage worlds. Both of which (tray files for library and save files for saves) are kept in your my documents folder on your device.
The only way to have a household 'linked to your account'. Is to upload them to the gallery, which means you can find it under your profile in your shared items, where everybody can see and download them.
If you still have access to the computer in question, you can copy the tray and save files from that computer and put them on your new one, so you can basically pick up where you left off. If you no longer have access to that computer and you never saved the houshold to your gallery, I'm afraid there's nothing you can do about it anymore.
