For the game, I'm working on the New Commerce Museum of History...
The whole building, or the facade/front only? Either way, I like the look of your plan! Might have to borrow that for my next round of buildings... My only quibble with the plan above is the main door looks undersized - shouldn't it be about 30-50% taller than it is, judging by the positions of the windows?
I also like the look of your iron fence out of plastic embroidery mesh. I really must track some of that stuff down, so many uses for it! (the local Michaels doesn't seem to stock it, and I haven't made it to a proper fabric/sewing store yet...)