I drive Sand Lake 5 days/week to work. It looks like they are building a city. Especially this week since they have been tilting up the building right next to Sand Lake. I'll get a ground level pic tomorrow.
And as far as the Potter showbuilding being big. A while back I called it something stupid like Guardians of the Magical World: Cosmic Timeturner. Anyway this pic shows 2 workers on the roof. It gives perspective. It's a BA building.
Obviously, credit to Bio for the amazing pics!