Size?
Building Permit?
Floor material? Wood Floor (pier and beam) is much nicer to stand on, compared to concrete... but 'crete is much better for metal working.
Locally we can build under 150sq ft without a permit.
I ended up building my "wife wanted a 10 x 12 shed" a little bigger... 18' x 24' in size. Standard 2x4 wall construction 8' side walls. Went with Engineered Roof Trusses (Commercial item).
I did a 16" o.c. Stud, so I should have gone with slightly different size to save material. Think of 4' wall panels... hence either 16' or 20' width.
Still pretty happy with the 'oversize' shed as once all the gardening stuff (riding mower, push mower, rest of the lawn stuff), wife's potting bench, kids work bench (RC car stuff, soldering, etc), storage, bicycles, pool stuff... it is crowded in there! Great part... It was built before the shop, so that stuff doesn't go into the shop!
Random Photo attached (note the odd ball 'last stud' sizing... I had messed up on stud spacing... first stud isn't 16" away, but needs to be offset by 3/4" so adjoining panels can be nailed to the same stud the 4' mark... :flipoff2:
EDIT: I placed "J" hooks into the concrete slab when it was poured, without realizing I would then have to scatter my studs to clear the hooks... Doh... hence the odd looking double stud on the right of the photo.
Here in Texas HEAT is killer for storage. If you look between rafters you'll see blocking above the wall. What you can not see is a 3/4" air gap that I screened. Full ridge vent on the top. Dust gets into the shed, but air flow keeps the heat down and helps ventilate the building
Side panels were 3/8" OSB, construction glue, nailed... the covered with Hardiboard (concrete based fiber board). With OSB behind it, not a problem if Hardiboard is hit...