I had an idea for a compact G scale layout for a while - one that would fit in a 'spare room', instead of requiring a full basement or garage. I decided to set up a test layout in my 12 x 11.5 greenhouse before moving the plants in. The (sortof) 'L' shaped table takes up 8.5 x 8.5 feet, but leaves aisles with less than two feet of clearance to either side.