Both buildings are made out of insulation foam and layers of single sided cardboard.
For the windows I used some plastic HO scale bits that I found at a flea market last year. I didn't catch the paint on the window sill until after the picture was painted, but I have painted over that. I really like the stucco texture on this one, and discovered it quite by accident just before I was set paint the whole thing.
This is the second building, which turned out okay. It was built using the same methods as the other building with the exception of the windows. The windows an this one are shutter made out of foam.
Here is the back side of the building. The small shed is there mostly to provide added stability as the model was pretty weak without it. It is made out of cardboard with small strips of foam added on for the planks.