Here is a new structure I am working on. This is something I see all the time in HO, but not as much in O, a shallow relief building. Kind of like a flat, but with some depth, so you could add more roof details, and lighting.
This is intended to be an apartment type building that you might see backed up to the tracks. While I have seen some building fronts used like this, not as many backs. The roof line is the back of the building, so typically I think the windows, and the roof line are more plain/utilitarian. I have some down spouts to add, some fire escapes, and steps, so this is a work in process.
It seems like a lot of times you see a store front as a flat up against the wall with the tracks in front of it, but I think more likely the tracks ran behind the store, or in my case the apartment.
As always comments and suggestions welcome.