Urgh stop clay rendering...it hides your errors and reduces discernible detail. You have misaligned vertices, you've chosen a VERY poor place for the street lamp (that intersection with the wall is just... what were you thinking?), those planter type things you have on the side of the walls are actually what the lamps should be in, and they are modeled too low (should be level with the wall, also wrong shape), and your planter on the terrace foreground is some weird, ambiguous shape (the one in the concept art looks nothing even remotely similar to that, and i'm not even sure how or why you'd come up with a shape like that), and you have some very severe changes in wall thickness all over the place.

You really really really need to pay more attention to both the concept and how you're modeling. You're getting closer to the odst style, don't let your modeling kill it.