A Khajiit small/medium house similar to the stone Lorkhaj temple style (e.g. Do 'Krin Temple):
Khajiit temple and Orc longhouse are lacking indeed to this point! And a ship would be a great idea too for some pirate roleplayers (maybe one ship home per racial type of boats in game).A Large Ship.. can be at port or out at sea off small island with 1 palm tree.
Last, Plot of land with Orc Long House. (kinda like Skyrim ones, tooked into mountain, with logs as a fence. ) Or again... blank stale of land, or mountain top that isn't race centered.