This is a Plasticville O-scale apartment building that I use in our ATZ (All Things Zombie) games. I don't usually put this much detail into a model but I just started fiddling with it and kept going because I was having fun. O-scale seems to work pretty good with 28mm miniatures. The figures in the photo above look a little large because of the angle I took the picture.
The picture below gives you a better sense of how the figures compare to the building, scale-wise.
Those yellow biohazard-suited come from Copplestone, and you can see they match pretty well.
That's pretty much it for now. I'm a somewhat sporadic poster, but I'll try to get a few things up as I dig them out, along with some of the new things I'm working on.