I see the good contrasst between sky and building, but the building itself lacks contrast as does the foreground which for me, detracts from the overall contrast of your photo.
This photo has the appearance of being over post-processed. I find the contrast it definately high and it has beautiful colors but the focus is off. It could be because the contrast is to hi for the type of shot and IMO doesn't work in this challenge. The subject in the photo also lacks interest and I also find it very boring. There is also some noise or dirt in the top right hand corner of this photo. Good luck in this challenge. <4>