Developed Sketch

I've taken the design which I liked the most and drawn it out again bigger so that I can develop it to make it better and to add more detail onto each part of it with various textures and whatnot.

I drew this one using a ruler rather than freehand so that I could keep it in proportion and to ensure that the lines were straight.
As you can see I have started by just adding small bits of texture to different parts of the structure to just show what these parts will be made of, the building itself will be bricks and the roof will be tiles.