Still working on my Archviz portfolio here. I would be happy to hear some advices to improve.
For now i am focusing on realism (some architect friends of mine said: "oh, i would rather have blue sky…and this moss on the concrete base, i am not sure …)…but whatever… 
This one is based on a real villa somewhere in Belgium. I wish i d’live there…
clay version:
I think you “nailed it.” The clouds don’t really stand out, but upon inspection I do notice now that they are there, making the sky more believable. The lighting is believable, the trees and the lake work well, and all-in-all I think it works. (The “decking,” in such a place, no doubt isn’t “real wood,” and your treatment conveys that.)
Except for one small detail: that “chimney” on the roof isn’t connected to anything. 
Sure, you could model and add a suitably rich-man stove or free-standing fireplace if you want to.
Thank you for your reply 
Funny thing about the chimney, this is its “real” place on the real house. I have also found it weird…maybe it has some vent hidden below the roof.
I featured you on BlenderNation, have a great weekend!
