Play around with the cropping a bit. I think you could use a little less of the big roof skylight, but keep the symmetry. There may be a second picture using the skylight but leaving out the area around the clock.
I really like the composition - I think it's a good balance of the skylight, the roof, and the clock. It makes an interesting statement about time - you have the old clock on the one end, and the new high-tech roof projecting forward from it. Great use of the square format too.