You know if you shrunk it slightly, perhaps to 12x16 you might not even need to involve an inspector. In some towns in NH anything under 200SF doesn't need a permit.
Also, DKR brings up a good point, if you are exposed to wind you may need hold downs. However my experience has been you have to be very exposed, I've done a number of single pitch wood sheds (sort of like a bus stop) that one would think would flip right over very easily, they aren't even pinned, just resting on granite blocks and none of them have flipped over yet. They are also so rugged that I'm confident if they did it wouldn't be hard to just roll them back up on their feet with a tractor... but that's probably not exactly the assurance you're looking for!

But my point is to consider the exposure you have to wind. If you're in a typical NH site carved out of a wooded area you're probably not in need of tie downs. But if you're fortunate to have a million dollar view you probably get some pretty good weather!