But we didn't see any in the Trailer did we ?
I hope it's just a huge surprise.
Whether something is in the trailer or not doesn't mean it will or won't be in the game.
I had people rather annoyed at me before release when the one trailer came out, before the announcement that rideable horses were in the game. A lot of people were ranting about riding horses, pointing out the one saddled horse you can see in the trailer. I mentioned that a saddled horse tethered to a hitching post didn't equal rideable. Morrowind had saddled guars, but none were rideable. Until something is announced or the dlc comes out, I'd just wait and see.
As far as building in the "Breton style"; I hope it fits the weather and terrain of Skyrim. Otherwise having your Breton style house collapsing under the weight of the snow, sinking into the melting ground every spring, or blown down in the blizzards and windstorms wouldn't be a good thing. Hopefully it is also well insulated....