They exist. Search for "complete prefab off grid house". Here's an elaborate one. [1]
* how much does it cost?
* what’s included? What are the specs on the windows? What kind of toilet? What’s the flooring made from? What are the screws that hold on the bathroom mirror?
* how long is the warranty?
* where is it located?
Obviously these questions don’t apply to a spec house listed on an architect’s site.
But more generally you find when attempting to purchase an off-grid house or even a small/tiny house, that they leave as many question marks up to the buyer to DIY as possible.
I’m advocating for the reverse: sell me the cheap Xiaomi phone of houses: something mass-market, with sane trade-offs, and all the boxes checked in advance, including the parcel where it lives.
Go ahead and put a price tag on the whole package, builders. Customization = bad (for me).
If somebody else wants the modular custom-built PC of houses, that’s fine.
Me, I’m good with mass-market.
Until there are thousands of these things and the kinks have been worked out you can’t have that. Every innovative architect home has one (or more) secret horror story/screwed up detail you haven’t heard about. When doing something new you need to bear the mental burden of making the house work, build yes but also maintenance which is also specialized and non-standard.
There will be a lot of customers learning this the hard way as the industry catches up with demand.
So you want mass-market off the grid?
You realize thats kind of an oxymoron?
The mass market is by definition only on the grid. Because the grid is predictable and there you can mass produce.
But off the grid allmost always has to be customized. Just alone the getting things there and installing them part.
And like others mentioned, what do you do off grid if your mass produced solar/thermal heating system breaks in the winter?
Order a new one? To be delivered by helicopter?
Off-grid power, water, and sewerage do require on-site work, and usually more land than the house alone uses.
That is to say, I love the design. But I suspect my wife wouldn't.