The little cabin where I live does not have a basement. Tornados come through the neighboring counties several times a year. My best option at those times is to load up the dogs and cats and drive to a neighbor's basement. I'm planning on building a nice little garden/tool shed--maybe 16'x16'--when I'm able, and I was playing with the idea of building it with a basement. Help me think it through: What problems do you see with this idea? Does it sound generally feasible or do you think it would be more trouble than it's worth? I know very little about sheds or basements, and I fear I may be overlooking some obvious points.