Fortified houses

In Australia it is illegal to build a house that protects the occupants from intruders from the outside. If the police cannot enter forcibly then it is fortified.

Regulations in Australia and probably the same in other countries.

Engineering in Australia not governed by the Fair trading department like plumbers carpenters and bricklayers mechanics and electricians.
The engineering trades are welding and boiler making and fitting and machining.
These are industrial trades if you like. The others are used in domestic situations and consumers need protection.
This is also one of the reasons tiny houses are tolerated but if there is ever an accident on the roads then watch the laws change. This is also why my gypsy caravan is only the load on the trailer with a total weight of 700 kilograms.

steel house sketches

 The  above shows a two  story house with over six feet head room up and down stairs, and is towable on the roads. The draw bar and wheel assembly slide into tubes that pass threw the house and are bolted into place with bolts next to the house structure and the tubes go two feet into the house walls.

This sketch shows a three story house that tilts up on site. This also uses the same draw bar and axil assembly as the two story version.
There is a universal law that allows one to put anything on there land that is removable. These two structures are removable.
The floor is suspended on 20mmx20mm square tube.
These are light enough to be helicoptered into a wilderness site.

Steel welded frames

In my gypsy wagon I used 20mmx20mm steel tube for the frame and the thing came out stronger than I had thought. The towing width and the height are what governs a tiny house. What about a house on skids like when there was no wheels?
The two photos below show an early house on skids photographed up near the Queensland border.

The cladding is plywood with a steel roof.
Now if one were to build a sixteen foot high house and lay it on its side for transport then the height restrictions become higher.
Maybe a three story tiny house!
This is my gypsy wagon...