Floor plan optimization single-family house 140m2 on narrow plot

Maybe again with a windbreak and terrace, that would be perfect.

True, but that has little to do with the existing structure. Probably mirrored as well. The entrance is in the backyard. I wonder if the outside stairs exist?

Then the course of action would be clear to me: continue using the basement...

If the ceiling of the basement is so low and presumably also damp inside, you might as well just knock it down. Besides, you are free in the planning of the entire property. I wouldn’t be squeamish about it, and the excavator, which is already there anyway, doesn’t care either.

That's true, but it has little to do with the condition. Probably mirrored as well. The entrance is in the backyard.
[...] I wonder if the outside stairs exist?

Okay, I agree with that question; also with the one about the terrace, whether it exists. The vestibule would be removed, and the new entrance could be placed where the cellar stairs currently come up.

If the cellar ceiling is that low and probably damp as well, you might as well just knock it down.

If damp, then yes. Floor height is 235, so room height probably about 210, which wouldn't matter to either the jars of jam or whoever goes down there. Except for laughing, you don't go to the cellar for anything enjoyable. The cellar is a cellar substitute room substitute. You don't put the trampoline there, only store it.

Okay, I join the question; also the one about the terrace, whether it exists. The windbreak would be removed, and the new entrance could be placed where the cellar stairs currently come up.

The terrace does not exist. Further below, I will show all views.

If wet, then yes. Floor height 235, so room height probably about 210, would be irrelevant both to the jam jars and to the one who goes to them. Except for laughing, no one goes to the cellar for anything enjoyable. Cellar is cellar replacement room replacement. You don't put the trampoline there, just store it.

Unfortunately, the cellar is damp, but I have pictures of this right away.
First, the exterior view (the facade is deceptive)

Southwest side:
[ATTACH alt="Südwestseite.jpg"]87346[/ATTACH]
South side:
[ATTACH alt="Südseite.jpg"]87345[/ATTACH]
East side:
[ATTACH width="264px" alt="Ostseite.png"]87350[/ATTACH]
Northeast side:
[ATTACH alt="Nordostseite.jpg"]87343[/ATTACH]

Cellar stairs:
[ATTACH alt="Kellerabgang.png"]87352[/ATTACH]
Cellar floor:
[ATTACH alt="Kellerboden.png"]87353[/ATTACH]
Cellar walls:
[ATTACH alt="Kellerwand_01.png"]87354[/ATTACH]
[ATTACH alt="grundrissoptimierung-einfamilienhaus-140m2-auf-schmalem-grundstueck-668863-2.png"]87357[/ATTACH]

Interior walls:
[ATTACH alt="Innenwand.png"]87356[/ATTACH]

Unfortunately, I will not be able to finish my floor plan today, but given the current dynamics of the project, I am already curious about the reactions to the pictures.

Do you already have an offer for the demolition?

Do you already have a quote for the demolition?

Not a concrete one yet... but I expect about €30,000.

Clearing out and gutting will be done by myself.