Damn, wastzzz, you beat me, while I was slowly typing/eating breakfast... anyhoo...
Never mind that your house appears to be about 500 sqft, tops... your camera pitch and/or perspective is way, way off from bg. Maybe use an enormous ground plane (invis to cam) next time, which will help you know where your horizon should be (or if using a plug, turn on grid).
I really wonder if you used reference images, at all. Even artsy-fartsy modern houses have to comply with building codes etc. It is not plagiarism or denies you the ability to call your creations uniquely yours, if you use reference images to at least make sure your buildings follow even the most basic building standards. And, sorry, but what the hell is up with that garage? Even flat-top roofs are thicker (occupy more space vertically) than your garage and main floor would suggest. You would not be the first though to post an image here that did not seem to account for roof trusses and/or floor joists. If you show us some real world reference images that have similar roofs, I will take it all back.
