That's depends on your criteria for a good house.
Boulder tree refuge has a huge amount of space, but weird round rooms.
Mournoth Keep has awesome "tiers" and is right near a way shrine
Velothi Reverie has a really nice internal layout including a "dungeon"
I'd recommend looking at http://eso.mmo-fashion.com/housing/
Lois McMaster Bujold "A Civil Campaign"Reputation is what other people know about you. Honor is what you know about yourself. Guard your honor. Let your reputation fall where it will. And outlive the ***
my fave is Velothi reverie as its practically a large home sold at a price of a medium one.
of the small houses - Autumn's gate has decent amount of space inside and out for its price, while if you prefer more arid environments, Twin Arches is amazing value for the 73k gold it costs. even with inability to use its flat roof (shame!)
Lois McMaster Bujold "A Civil Campaign"Reputation is what other people know about you. Honor is what you know about yourself. Guard your honor. Let your reputation fall where it will. And outlive the ***
I'm actually hoping for an Orc Longhouse =/ It's a shame there isn't a design like that yet.
Strange how nobody is mentioning the Hunding's Palatial Hall, which is HUGE, multiple decks, multiple ocean views, views of the harbor, it is absolutely amazing. Also, the Forsaken Stronghold is awesome too, huge with plenty of awesome views.