Maek, that is confirmed, those houses will be open soon, just wait for announcemnts.
https://www.youtube.com/watch?v=a1qsjUxIoYY
https://www.youtube.com/watch?v=seGPVCVxlxE There's the one north of Kvatch (crowns only). There's Hakkvild's High Hall, which comes/came with HotR, availible for gold if you've completed both of the dungeons (not sure if you need to have completed hard mode or not). And there's the house previously know as the Cozy Fenside Cottage (the name was changed, but it's near Aldcroft in Glenumbra I think). You need to have completed all Witch's Festival achievments to buy it, and I think it'll be availible when the Witch's Festival comes, if it isn't already availible.
Ps. There was a house in Coldharbour that was datamined, but there's no release date for it.