Single-family house with gable roof approx. 137 sqm, 1 full floor

I also think that not nearly as little light flows in through the west and east windows as is sometimes suggested here.

In the attic, your windows are very, very small – regardless of east/south/west. Your 17m² bedroom has a 1m floor-to-ceiling window. Ours, with 14m², has a total of 4m floor-to-ceiling windows (which I find a bit too much, but my wife loves bright rooms – and it’s her house).
On the ground floor, you currently have no west windows. Only north and east, which means it is dark from noon onwards.

it's about insertion into the environment (§34). Could you maybe upload a Google satellite image of the surroundings for us? You can hide the street names there.

I couldn't find the hide function^^

In the attic your windows are very, very small - no matter whether east/south/west. Your 17m2 bedroom has a 1m floor-to-ceiling window. Ours with 14m2 has a total of 4m floor-to-ceiling windows (which I find a bit too much, but my wife loves bright rooms - and it's her house). On the ground floor you currently have no west-facing windows. Only north and east, meaning it’s dark from noon onwards.

If we rearrange the rooms partly as planned and relocate the carport and storage, we will of course also install new windows so that there is enough light coming in.

Since we will not have a door from the hallway on the ground floor to the living areas, the light from the hallway should also fall into the living areas, right?!

Certainly better than none at all. But what is the window or door on the ground floor supposed to look like? Clear glass? That means anyone from the street could look straight into your living room. That’s why these doors/windows are usually frosted, and then exactly 0 light comes into the living room. Even if it were clear glass – that you would brighten your living room with it unfortunately remains a dream. Way too far away.

I also think that far more light flows in through the west and east windows than is partly portrayed here. I estimate that the architect can assess that quite well.

The architect implements your wishes. Nothing more. If you think he won’t build you something because it would be too dark, you are mistaken. The only thing that matters to him is having the building permit and the money in hand. If all houses stand "crosswise," you will hardly be able to deviate from that. This also applies to the roof. The information simply was missing for an assessment.

What about the office - can that go to the [OG]?

What about the office - can it go to the upper floor?

Sorry, yes it could.

If all the houses are positioned "crosswise," you will hardly be able to stand out from the crowd there. This also applies to the roof.

At the very end of our street, however, there are also 3 town villas with a pyramid roof. But is that enough as an argument for the gable facing the street?