can't you make it bigger?
No, not easily. 120 square feet is the maximum without any sort of permit. Plus I have some serious propertly line offset issues. If I went the permet route, the county is involve, the community board is involved and the land owner is involve (don't ask). I started out planning an 8 x 10 so this feels like the Taj Mahal. Put some rafters up today.
Oh, I hung some rafters today. Great fun.
Two suggestions that might help a lot for such a small space. First, on the gable end, make a little door on the top, like you see on barns, so you can store 10' material and other things easily. Getting boards through the 2x4 ceiling joist would be impossible for anything longer than 4'. Second, you can get a small overhead garage door, say 5' wide, or maybe a little more, and put that on the gable end rather than the normal door. The extra width will help all the time and in good weather you can open the door and give the shop more space. Make sure you put something angled on the floor for the garage door though, you want the water to pitch off the structure rather than onto the floor. The best steel door in my area is Garaga, a canadian door company. I have this set up on a utility shed and my similar sized work space.