Another issue with my original construction, was that a lot of the geometry of the first and second floors was duplicated without me realising it, which in turn affected the surface values of the building maps (it made them all blurry and distorted to look at). So I went through each face of my buildings and deleted them until they didn't overlap any more.
This time round I decided to make use of tile-able textures, with some brick textures I took from my photo references to create my texture maps, editing them so they tiled. I made sure the bricks were more darker tones, and had a grimier surface property as my previous texture used seemed to bright and clean compared to the surrounding buildings
Even though I wanted to add a lot more external decoration and derelict things to the building, the time I had to work on this before I re-submitted it was limited... so with the time I had I decided to create some Chinese lanterns to go outside the old restaurant, which helped in adding to the exterior aesthetic to the building.