I suggest you to review all your meterial as they're not near to be physically correct. At this distance it's also kinda hard to see your normal map. As metioned by Mr.Dwalker, couple of your mesh are too fat or squashed. Take more shot up close and work on those material as possible.
Make some decals to simulate stains from rain (particularly on the roof, below the windows etc.). The roof is too saturated in my opinion and looks too clean. I also find that the building looks way too blocky, add some extra geometry on the corners and add noise (manually) so they're no longer pefectly vertical (you could do the same for the trim around the windows). You can do this easily without having to rebake anything or change UV layouts. Try doing it for the wooden planks as well. Even a little bit of noise will make a huge difference, without it they just look perfectly flat and unrealistic.
edit:
Here, I went into Photoshop and did some quick editting using the liquifier. Also desaturated the roof. You can see it makes a lot of differences even if the noise added is very tiny. It would look better if done with geometry because the liquifier in Photoshop uses a spherical brush which is not really what you'd want for this.
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The stair railing is also too thick. and a bit short.
I don't know how close you are trying to get to the concept, buy your windows are much wider. Your barrels also appear too squat.
The awning could probably use a few more segments.
edit:
Here, I went into Photoshop and did some quick editting using the liquifier. Also desaturated the roof. You can see it makes a lot of differences even if the noise added is very tiny. It would look better if done with geometry because the liquifier in Photoshop uses a spherical brush which is not really what you'd want for this.
http://imageshack.us/a/img802/4954/z2ad.jpg