Floor plan optimization single-family house approx. 150 sqm - on a small plot

How about converting the attic and creating a workspace there?
My mother solved it that way.

If it's just about a workspace and a cabinet for folders, then something can also be done in the hallway on the upper floor...
For example, in your hand-drawn floor plan. Right drawing, bottom center of the plan. My parents have a window there, and at the window they once had a workspace and next to it a chest of drawers. It looked good too.

How about converting the attic and creating a workspace there? My mother solved it that way.

Symmetrical? *SCNR*

For Olivia Jones, just without mega heels. The "office" is enough as a laptop bag storage and for the annual tax declaration session, but for regular home office only with controlled residential ventilation

Good that controlled residential ventilation is on the list

How about converting the attic and creating a workplace there?
My mother solved it that way.

If it’s only about a workplace and a cabinet for folders, then something is possible in the hallway on the upper floor...
For example, in your floor plan drawn on paper. Right drawing, bottom center. My parents have a window there, and at the window, they once had a workplace and next to it a dresser. It looked good too.

We don’t want a "third" floor!

Yes, it’s only about a workplace "for emergencies" and some folders. It’s questionable whether my employer will ever send us back to home office. With the office as a separate room, we somehow always exceed the set max. 150 sqm..

Either the kitchen becomes too small or the living room but probably everyone here knows that...

A new draft is available, the house is 1 m deeper, so the living room has become larger.

In my opinion, the office feels too convoluted.

I really don't like the bathroom situation on the upper floor.

I agree with you, I don't like either of them.

Swap the utility room with the office. Then the office won't be cramped and a utility room is just a storage room anyway and in my opinion can be cramped.