180 sqm non-replacement house, best adaptation to the plot?

Barn character what does a city dweller understand by that? Here in the village there are plenty of barns certainly not 1:2

Barn character – what does a city dweller understand by that?

That’s certainly true, every region has the most diverse barn formats... Since the city dweller ;) actually comes from the countryside (SLH) and has also revitalized rural England: something roughly like in the pictures (the black-modern house by no means reflects my color preferences, rather beige-gray brick)
1 1/2 stories (this point does worry me somewhat, whether a 2 or 2 1/2 story of this long-narrow type would look just as harmonious as a 1 1/2 story), long and narrow, steep roof shape... whereby one barn has a quite interesting “appendage” with a shed roof (?), not entirely puristic.

Someone here in the forum had a very nice example of a dark red-brick 1 1/2-story house, unfortunately forgot who...

Maybe a bit about the surroundings of the property: villa area with predominantly light red or yellow bricks with white frames, from around 1900.

The pure orientation of the garden to the southeast neighbor that arises from this must certainly be considered exactly again in the end.
So, I’ll now get started on making the elephant food :p@11ant and try to be more specific.

Was on the property again today with my youngest, checking the sunlight exposure... we already have a wonderful roommate... :D jumped off the property fence...

1 1/2 storeys (this point does worry me quite a bit, whether a 2 or 2 1/2 storey of this long-slim type appears as harmonious as a 1 1/2 storey), long and slim, steep roof shape...

I don't understand your concern. 2 are allowed, aren't they?! Barns are visually 2-storey

Storeys: Max. 2 storeys plus roof

With us, barns are tall, but the basic form that still fits and a lean-to roof are a must.

Uh, that rules out almost all proposals. Would try to get a bit narrower. With an attic, you have plenty of living space for three.
And you stand out with it.
At least 3m downstairs. Maybe also a gallery or a very open staircase. Barns are airy and tall. No forward or backward recesses. Actually completely the opposite of the design with slanted walls. Whoever likes that

I know so-called barn houses from Scandinavia; there are also providers/carpentry businesses in Germany that build so-called barn houses. Great, modern architecture. In NL, I once saw something from "Zwarthout" or similar.