Hmm I can see what you're trying to achieve....I think.
The split down the middle of the edge of the brickwork, to separate the shot.
However, (I hope this doesnt sound horrible), I think the right hand side of the image is wasted. There's nothing in it to interest me at all. Nor to offset the left and the graffiti.
What I think may have worked, from what I can see of the scene, is a portrait of the graffiti and the window above it, half and half, black and white, so to speak.
I hope this doesn't put you off sticking with it, because it's only my opinion, and I really hope it doesn't sound too harsh.