Floor plan for narrow semi-detached house - basement + 2 upper floors + attic without knee wall

The building envelope is very strange. My general urgent recommendation for the joint planning of semi-detached houses I particularly extend to also joint construction if there is to be inconsistent building with/without a basement.

The building envelope is very strange. My general urgent recommendation for the joint planning of semi-detached houses especially extends to a joint construction as well, if there is going to be inconsistent building with or without a basement.

The building envelope is like this because previously there was a single house. Now the property is divided – so that it makes some sense for both, I only get this (smaller) part of the building envelope on my (larger) plot. But the neighbor can still only build exactly like this, because otherwise the floor area ratio wouldn’t fit again. Development plan from ’63 – I also find it strange to define a floor area ratio and then set a fixed building envelope on the property. Otherwise, we would build wider. We are building together with the same developer, both with basements, same roof, etc. The neighbor then has the garage directly next to the house because there is only 5m distance to the boundary. If I could afford it, I would have bought both and built a nice single-family house on it :)

Definitely reconsider that, having no bathroom on the ground floor. Friends of ours have it that way, and I’ll just say this: it’s crap!! They say so themselves, by the way. If you ever want to sell the house again, that will become a problem.

You don't have to cut into the entire south side and can extend the terrace from east to south... Then the guest room will just have to make do with one window.

Definitely reconsider that, having no toilet on the ground floor. Friends of ours have it like that, and I’ll just say: it sucks!! They say so themselves, by the way.
If you ever want to sell the house again, it will be a problem.

I really don’t think it’s okay that everyone here is adopting my wife’s point of view. That wasn’t the agreement :D

But you have to say: currently we have a terraced house on a slope, access via the basement, and there we have the guest toilet in the basement. On the ground floor – living room, kitchen, and pantry. It’s not ideal, but it doesn’t really bother us that much.

But I understand: you want a toilet on the ground floor – I will revise the plans accordingly :)

Because of the building envelope and such: often it may be exceeded for subordinate components like stairs (for the exterior stairs this is probably already the case, right?!) but also for conservatories and bay windows. This way you could extend your dining room with a bay window, but the top-level window in the basement office would be omitted.