Very nice Royaly. Glad to help when I can.
Try moving your distant light to the side a bit so it rakes across the fornt of the builing. The more drama the better! Looks like you have a good sunset reflection in the glass at one end, so try moving the the sun light in that direction and making it a little yellow or orange.
Also, I have that same HDRI and depending on which direction your model is facing, the lighting goes form overcast to bright and sunny. Put your model in a folder and spin the folder 90 degress at a time and rerender. You won't believe the difference in the lighting and the quality of the sky.
Jake