After looking at this painting on the screen, I could see something was missing. I have gone and done some amendments on it which have helped a bit.
The blue wall above the middle doorway was really bugging me as well as the tone of the water. I added a window to the blue wall and created a balcony. I also darkened the water a bit more with Cobalt Turquoise. Hope this does the trick and makes it more balanced.
BTW.... this is the first Architectural watercolour I have done. Painting buildings have always scared me!!!!!!