Lovely detail, light and composition. Doesn't sound like a very original or profound comment, I know, but it is these aspects that add up to give a charming result.
When I look at your photographs of buildings, I wonder what your mock-ups would look like if you were an architect... Or maybe you are, after all, in your sensitivity...
Interesting, I like the way the flowing, organic lines of the tree intersect with the rigid, geometric lines of the building. The b&w pp helps to bring this out. It does feel as though the horizon needs straightening though.
This is such a wonderful photograph. The way that you've placed the tree in relation to the building behind it causes the eye to reassess the scale of the objects. What a wonderful effect.