Floor plan design of an extension apartment with an unusual layout - Your ideas?

Hello everyone,

my partner and I moved into an end-terrace house last year, which was expanded in the 90s with an annex apartment.
The original idea of the builders back then was that a caregiver could live there later if the residents needed care. For this reason, there is also a connecting door from the annex apartment into the kitchen of the main house.
However, since my girlfriend and I are only in our late 20s and we don’t need the space in the annex at the moment, it is now going to be converted into a small 2-room apartment.

Since we are having trouble making a final decision about the new floor plan, we would be very grateful for some ideas. I will briefly list the key data and requirements in clear bullet points for you:

[*
We do want to make the door to the main house disappear (e.g. with drywall), but want to be able to reverse this later if needed (e.g. if we need care in 60 years).
[*]The bathroom is disproportionately large, but we do not want to go to the trouble of moving walls there.
[LIST]
[*]Instead, we want to place cabinets there as storage for household items (vacuum cleaner, cleaning supplies, etc.)


[*]We would like to build new walls (e.g. tear down the kitchen wall and build a new one), but the windows should not be moved.
[*]We could imagine creating a room without exterior windows, but instead with "clerestory windows" high on the walls and a frosted glass door – is this allowed under building regulations?
[*]The kitchen needs to be redone anyway; if necessary, we would also build it on the other side of the bathroom, since we can tap into the bathroom pipes there.

I have attached the floor plan with compass and also overlaid the satellite image so you can see the lighting conditions (e.g. large trees from the southwest take away a lot of light).

We are now looking forward to your suggestions! Feel free to use the floor plan template attached to sketch your ideas for the new walls with PowerPoint, Paint, or similar!
:)
Best regards
Adrian

Honestly? Forget all the renovation stuff and leave the apartment as it is. Close the door to the main house (95% chance you won't be living there in 60 years anyway) and rent it out. If there is any demand for such an apartment at all: - apartment/small - poor layout with slanted walls - parking situation? - garden access/use? A renovation won't make the apartment any better.

We would like to build new walls (e.g. tear down the kitchen wall and build a new one),

Why? It's a nice apartment as it is now. If I were single and a tenant, I can section off an area for myself if I want to. If the office agrees (because of parking space and such), then rent out the apartment as it is if you have no use for the rooms yourselves.

The builders' ulterior motive back then was that a caregiver could later live there if the residents needed care. For this reason, there is also a connecting door from the annex apartment to the kitchen of the main house. However, since my girlfriend and I are only in our late 20s and we don't need the space in the annex for now, it is now to be converted into a small 2-room apartment. [...] We do want to have the door to the main house disappear (e.g., with drywall), but we want to be able to reverse this if necessary (e.g., if we need care in 60 years).

I see no further "conversion" here than sealing off the intermediate door opening and changing the doorbell sign for the new tenants. Possibly they will also be given separate meters. Or they are only taken in as "subtenants" and the hassle with an additional parking space is saved. Such caregiver room reserves often only lead to a sale before their activation. Before I turn sixty years old, I will have moved for the fifth time. In the time until then, no one (including owner residents!) will have been encountered who lives in the same house for six decades. And I am very surprised that there are still people in your generation who plan to cling to a property for so long. By the time you are in your mid-thirties, every first grader will know that this is a significant risk factor for dementia.