Flatland UHouse?

Lots of people who want to make earth berm houses live in flatlands.
But no one has made a house like this yet. Mike Oehler provides two thought through ideas in his book:

Clerestory flatland house 3 bed 2 bath 2000 sq ft.

Shed roof flatland house 2 bed 1 bath 900 sq ft.

I'd like someone to make a flatland UHouse, preferably wofati style, just to test it out.

Any thoughts?

I think berming three sides of a house makes a lot of sense.
Leaving the roof free of soil might be the way to go.

I am not sure what you mean?

I had a friend in Texas who lived in an underground house.  Unfortunately, I never saw the house as I met her after it caught fire and they lived in a traditional house.

I was told folks didn't know there was a house there as you could not see it.

So much depends on climate, geology of the land, and overall plan.

Most wofatis are built on gently sloped land because of 2 reasons: 1. you can move less dirt to get the earth you need and 2. you can arrange the grading to be sure that water runs off where you want it to, rather than weeping through the walls or coming up through the floor of the house.

Somewhere here on permies there's a series of videos of a couple in I think Alaska who built an earth bag cold cellar by digging a rectangle in the ground, earthbagging straight walls, and roofing it. It turned into a swimming pool in the spring run-off, collapsed the walls and they filled it in.  A sad tale of wasted time and resources we can all learn from.

Sepp Holzer built cold cellars in the sides of steep hills, but he made sure he knew where the water might get in, and put a pipe sloped down hill to air, so that water that got in, had a place to run out.

Building a wofati on completely flat land wouldn't be that different from building a "house on slab" which happens all the time in my climate. Good footings, much stronger materials, earth bermed walls and roof, then the all-important "umbrella". This is a waterproof membrane - usually two layers with insulation in between - that covers the entire house and first levels of dirt on the roof and berms. Then you pile more dirt on top and the sides. So you've got a "mound" house with the land sloping away from it for runoff and you have a lot of protection from windy weather.

This fellow, https://permies.com/t/180629/Hobbit-Home-Progress is building a house that will be earth bermed including the roof. He's using lots of concrete, but it's designed to last far longer than a typical modern house and use far less energy, so it is more sustainable than one might think at first glance.

Absolutely critical in whatever you design, is a minimum of 2 ways out for fire safety.

But many people don't have a hill to build on. This is a serious downside.

I'm really looking forward to reading about what you come up with Sasha! My land is pretty flat as well with a 14' max differential gently distributed over 20 acres.

Like my friend's house was built on flat land, many root cellars use the same concept.  

Here is a thread that some folks might find interesting:

https://permies.com/t/16955/Underground-home-flat-region

Why not build an "earth sheltered home instead:

https://www.energy.gov/energysaver/efficient-earth-sheltered-homes