Simplest 10 x 12 shed foundation build: Rim joists on Tuff blocks

 He spent $3500 on this shed

Too pricey for me but the foundation looks very very easy.

 Square up the Rim Joists (2 x 8s)....

Remove 18 inch square of grass/ground about 2 inches deep

Use a tamper to firm and flatten/level the ground first

The Paver base fill till level with ground and tamp level...

Use torpedo Level on Tuff Block....so they are individually level but NOT level with each other....

Set the Rim Joists on top of the Tuff Blocks...

Put a 4x4 in each Tuff Block corner...

Then level each joist.....and hold the 4x4 with a deck screw...

 

 Mark the 4x4s where they need to be cut off.... and then you can remove the Rim Joists....

then remove (from the top)  7 1/2 inches length and 1 1/2 inches depth on the 4 x 4....

 use a chisel to level the cut...

So the 4x4s are on the  narrower end of the rim joists....of a 10x12 foundation...

 So the floor joists are 10 feet long spaced 16 inch on center on the 12 foot lengths but also have 2 x 2s in the center for the floor insulation...

Then six arrow-head anchors are inserted with anchor bolts for high wind...

 then attach floor joists with connector screws....

 then 1 inch floor insulation poly board with polyurethane spray foam...

three more tuff blocks and 4 x 4s are added in the middle of the foundation for support....

then 3/4" floor board is added and staggered (4 x8s)....

 

The walls are 2 x 4 framing and the roof is 2x6....birdmouth (5/8" cut on 2x6 is just about 1/3rd of the width) and hurricane strap

 

then wrap it for water-proof barrier (tape it)...and flashing around the door and window and then sheath it....with LP smart siding (or concrete fiberboard aka "fiber cement" siding in wetter climate).... using a cordless circular saw...

 then and forcefield 3/8" sheath the roof.... with flashing and tape...

 

then fiber-cement trim boards... using a cordless nailer...

 then install the windows and door.... use shims to plumb, level and square the window/door with roof sealant bead and flashing...and more trim board...

 then shingles.... and soffit wood...

  put 2 inches of XPS foam in and then nailed pegboard to the studs. Much better (and faster) than drywall.