I just notice that the doors a little small…
very nice, i cant wait to see more
I love the composition, but there is a notable lack of details, such as plants, surface inconsistencies, etc. I would put some cacti or something in the courtyard, and maybe the suggestion of a few pebbles or something to break it up.
Well, that depends on the occupants 
Though basic it already has a good mood.
Reminds me on some Sci-Fi sets, somehow, …
I like it. 
Looking forward.
Very nice. Like modron said, more details. Personally, I’d like to see a fountain or a palm tree in the courtyard. Looks like tho!
dante
I really like the vibe that this piece resonates. I don’t mind the center being empty, but would like to see all the roofs slightly slanted, instead of just some. Also, a nice starry sky would be great.