I want to set some furniture atop other furniture.

[Ayan_Calvesse]

The floating tricks we use indoors rarely work outdoors. The closest we get is floating decks on top of fences.

The only way to get those items placed as you want is to use one of the various mods that's prohibited under the ToS.

Your choice on whether you want to take that step as other players have. If you decide to do it, talk to the players who are already floating items in their yard. No one is going to openly give you details in the official forums. Your best bet would probably be going to one of the housing related Discords.

To be fair its the minium height requirement. I've seen people float the brick flooring up to the 2nd floor on the large forge facing to extend that porch. And people float the Gazebos about the same height and have 2 bridges to reach them for a look out tower.