wip - 10x for comments
I can’t get your image to load for some reason
the image server was collapse 
Can see it now
Looks good considering there is mostly no sun, be a lot nicer if there was more sun. With that background I think you could get away with the sun behind and left of the camera at at least a glancing angle on the front.
I’d also like to see some stuff on the balconies, plants , people furniture, etc.
10x here no sun be cause this is very old project … but after 1 year client create project for left building 
and this render present this building
here is first render:
here you can see where is the sun position in my first render
i like the original render but think the ‘zoomed in’ version suffers a bit from lack of resolution or something.
nice job though