Yurt platform on grade versus sunken piers

[Asheville Yurt Company]

For your consideration, one of the disadvantages to being close to the ground is dampness. You want to be off the ground at least 2 feet, preferably 3, with a ground cover under there to keep the damp from rising. This will help with the humidity issues but it also exposes you to wind issues so generally an elevated platform is enclosed with skirting as well as having the footers. Your call tho.

[ljamies1]

I dug four holes at least four ft. deep and then found the small/ single concrete blocks which have the spacing on the inside for a 4x4 post to fit into. fill each of your holes with the concrete blocks so their inside hole is facing up and you can drop your 4x4 post down into them/ tamp any gaps with paving sand/ now you have four posts facing up and firmly anchored into the ground/ best part is everything is removable. This is my current set up/ going on a year and a half in upstate ny/ no frost shifts yet...

[andrew3d]

Even down South where frost heave isn't a problem, I think piers sunk at least 4 deep is warranted. I believe you have better protection against strong winds and gusts if your foundation isn't going to move.