ᐅ Is it practical to preserve an existing basement and build a garden shed on top of it?

Hello!
We have built a new structure in the front yard of an older house that has partially subsided. The older house dates back to the 1960s and has a partial basement. All areas without a basement have noticeably settled.
We are now considering whether to demolish the house completely or only partially. We would like to continue using the basement. Is it practical or even possible to demolish the entire house down to the basement and build something like a garden house on top?
Or would a partial demolition be better, leaving only the foundation walls on the basement?
We would like to install a shed roof with a solar system on top...
My questions are: what would you recommend? Is it worthwhile to keep the basement? What would be the most cost-effective option?
Thank you in advance.

Ma_rei_ke schrieb:

We have built a new structure in the front yard of an older house, which has partially settled.

That means the new building is already there, and it actually lacks storage space if the basement is demolished; the demolition was not part of the building permit / planning permission, ...

Ma_rei_ke schrieb:

We would like to continue using the basement. Is it reasonable or even possible to completely demolish the house down to the basement and then build something like a garden shed on top of it?

In principle, I am in favor of preserving the basement, but there is still a lot of information missing here (and a picture is worth a thousand words). Hindsight is 20/20: my “golden” advice would have been to ask this question earlier and to coordinate the combination of the new building and the old basement in terms of planning and design from the start.

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https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/

I also believe in preserving the basement and, if possible, more of the old house.

As @11ant already asks, are there any legal restrictions that oppose this?

Instead of the solar thermal system, I would recommend photovoltaic panels.