modern Bauhaus, lots of glass, 170 sqm ground floor/upper floor, currently in phase 3

Screw the surroundings . I don’t understand what you’re constantly trying to say with it? As a neighbor in an old, ugly house from the 70s, I would be glad to be able to look at a modern building. I also built in a gap. All around only old, ugly houses. My house increases the value of the surroundings by 100000000000000%! The OP is building for himself and his family, not for the neighbors.

screw the surroundings . I don’t understand what you’re always trying to say with that? As a neighbor in an old, ugly house from the 70s, I would be happy to be able to look at a modern building.
I also built in a gap in the row of buildings. All around are only old, ugly houses. My house improves the surroundings by 100000000000000%!
The OP is building for himself and his family, not for the neighbors.

I have rarely read such nonsense. Why do you think the
Building Code (Baugesetzbuch)
§ 34 Permissibility of projects within the consistently built-up parts of towns
is supposed to be applied here?

The municipality doesn’t prescribe that just for fun.

We ourselves built a Bauhaus villa in a §34 area.

I see your house more as a timeless, imperishable work of art in which one can also live.

It doesn't matter whether it's a cube, Bauhaus, or city villa. The main thing is no multi-family house thrown in between, and the occasional neighbor suddenly no longer sees any sun in the garden

The house has some bottlenecks that should be fixed. "If necessary," the exterior suffers

Screw the surroundings @11ant. I don't understand what you keep trying to say with that? As a neighbor in an old, ugly house from the 70s, I would be happy to be able to look at a modern building.

The OP is building for himself and his family, not for the neighbors.

But between "for himself" and "against the neighbors" there has to be something else that fits besides just such a slap in the face.

I also built in a building gap. Surrounded only by old, ugly houses. My house enhances the surroundings by 100000000000000%!

Well, weak math or Sicilian nonsense, but I absolutely agree with you on the enhancement. Your neighbors' houses are clearly of an older taste, yes, but your house is significantly less aggressively modern. Maybe you could name the post numbers (in the house pictures thread?) where you can see the much less brutal contrast.

Two different discussion areas are coming together here. The exterior, which may have been subordinated to the internal function and is ultimately approved or not by the building authority, and the interior.
Something about the statement from the OP "to expand the garage because it might be too tight inside" does "frighten" me somewhat.

I am considering adding a door from the utility room to the garage and possibly enlarging the garage further.

It simply requires an individual and honest plan of where things will go. But that should have been asked and clarified by the architect. Even if you live spartanically, you must be able to store things dry and frost-free.
I find the calculation fairly tight and with a house like this, money should not be tight in the end for areas like design, equipment, etc.
Therefore, I stick to my point......less outside, more inside.....in terms of space, function, and quality. I am also missing some items in the calculation.