This is a bit of a interesting effect. The building isn't all that tall. I had to use a wide angle lens to get as much of the bottom in as I did. Wide angle makes a deep depth of field so the whole building was sharp. To create the effect here I started with 2 layers. I used a Gaussian Blur filter on the lower layer. I then masked the top area of the upper layer so the blur would show through. It creates a sense of distance in the photo making the building appear taller than it really is. This would be a photography for fun thing.
Taken with the 17mm 1/160th sec f11 iso 400