Everything was produced by Alex Roman. This includes the modeling, texturing, lighting and rendering, and the post production and music mixing.
What is more amazing than watching the video is learning that he did all these on his own. On this video, he used 3ds Max, Vray, After Effects, and Premiere.
The video above is actually an excerpt from the original 12 minutes video. Watch the whole video in HD format on vimeo.
Here are other related videos:
Compositing Breakdown (T&S)
Exeter Shot - Making Of
You can also see some of his CG and architectural visualization works on his online portfolio on CGSociety.