Conversion / Renovation Single-family house (Built in 1961) Ideas / Suggestions?

For me/us, the renovation of a single-family house is coming up in the near future.

I have been trying for some time to bring in ideas and see what is possible to create something more modern and open out of this rather old-fashioned architectural style.
It works very much in my favor that, apart from the roof covering, not much has actually been renovated since the year of construction in 1961.
Before I now go to an architect/structural engineer, I would actually like to know exactly what I want. Maybe some people here have a few ideas/suggestions on what can be made of this and might give me a different perspective on the floor plan.

Anforderungen der Bauherren

Style, roof shape, building type:
Roof shape and building type already specified
An open modern style is aimed for (as far as possible) (possibly also a small extension on the ground floor)

Basement, floors:
see drawings

Number of people, age:
initially only me, but hoping for a family :P

Space requirements on ground floor, upper floor:
GF: living room; kitchen; dining area; WC
UF: bathroom; office (later possibly a children's room); bedroom with dressing area

Number of overnight guests per year:
negligible; no guest room needed

Open or closed architecture:
open as much as possible; slight separation between living room and dining area/kitchen

Conservative or modern construction:
modern

Number of dining places:
4-6

Fireplace:
possibly

Music/stereo wall:
living room should allow use of a projector

Balcony, roof terrace:
not necessary; garden available

Garage, carport:
garage (more than 1 parking space will not be possible here)

Kitchen garden, greenhouse:
later possibly a greenhouse (but that has nothing to do with the floor plan)

Further wishes/special features/daily routine, also reasons why this or that should not be:
I do not like the current staircase situation at all.
Above all, I am considering whether it should be completely restructured.
Wasting as little space as possible on staircases.

Maybe someone nice will find time to give it some thought :)

Most people can't read PDFs. And then so many of them! :rolleyes: I only converted the floor plans + 1 view, each including a zoom.

I didn't quite understand the thing with the staircase: You might want to tear down the staircase? If you tear it down, you could also knock down the chimneys. Then one immediately wonders if the outer shell with this corner has to stay like this, and if that's in question, one wonders whether a demolition + new build wouldn't be much better. ;)

Maybe you should say something about the budget first.

On the one hand, I don’t see a staircase, on the other hand I see an exterior modern architectural style.

A staircase should connect the levels and be comfortable for the associated lifestyle in a single-family house sector.

A staircase is often a load-bearing element or has load-bearing walls as a frame, which support the staircase and also the intermediate ceiling.

I would not open any walls without a structural engineer and accept the staircase as it is.
And then the budget determines whether you only renovate or also change the entire floor plan. I would do that with an architect.

I myself would not change much there. I roughly like it, the staircase location is also fantastic.
Quite open and modern.
You could tear down the partition wall between kitchen/dining on every floor. A dressing room for the bedroom is already visible.
You currently don’t have guests, but certainly later, when you have family and children.

And what is the orientation?