Detached single-family house on a slope with a granny flat

I also find the children's rooms too small, but we don't know how we could make them bigger.

Unfortunately, the staircase divides the house into two narrow halves. In this case, I might consider a split level with two straight staircases. Continuous. Or push a double-winded staircase to the edge.

Maybe redesign the master bathroom as a shared bathroom?

That at least saves space.

The plan was that my mother would have her own area.

... a very dark one, and her bedroom is not even a living room but has a basement window. The bedroom is 8 sqm... it’s a hole.

The architect says you can't make living space above the garage. Is that true?

Yes, no living space is allowed in the border area.

I have to say, you are really demanding a lot from the plot. It’s not large, and with the construction and disregard for the garden, it comes close to a violation. Two driveways to accommodate a granny flat, even though it won't even be rented out...

Just under 10 sqm walk-in closet is a bit decadent... then dreaming of a gallery remains a dream. Make a normal bedroom, and upstairs a gallery under the roof will emerge.

In this respect, I would pay some attention to privacy, not place the terrace at the intersection, and rather aim for a terrace garden. With split level, half a floor comes out for your mother. For example, living area on the ground floor, living area in the basement with terrace, utility rooms on the ground floor, then children’s rooms, then bedroom (without walk-in closet) topped with a gallery. Something like that.

Without dimensions, you really can't guess much now.

The house axis is positioned perpendicular to the ridge to comply with the ridge direction requirement of the development plan (?), and the house then leaves a maximum of a north garden. The slope direction cannot be the reason, because if the house were rotated about 45° to the slope, after a 90° rotation it would stand the same. The extremely expensive additional structural engineering and insulation effort for the angular bay window is not matched by any comparable increase in living quality. Even in the northwest, the bay window still casts a shadow on the mother-in-law's dungeon. Planning at its absolute finest. The planner’s set square urgently needs to see a chiropractor.

Good morning,

yes, the building line must be observed according to the development plan.

thank you very much for your input. This is all much more complicated than I had imagined.
Yesterday I received the second draft and am just letting it all sink in.
The children's rooms have become a bit larger, as has the kitchen.

I would be happy if someone notices things that I don't see and can warn me.

Quickly: the kitchen does not work like this. Draw scale-accurate furniture and especially the correct distances, e.g. at least 1m between the island and the opposite parts.

Without dimensions, it is difficult to assess the whole, but I also see quite a few bottlenecks in other places: dimensions of [Kinderdusche], access to [Kinderdusche], dimensions of [Elterndusche], length of the stairs, width of the garage, width of [Kinderzimmer 1]... As I said, maybe I'm mistaken because I can only estimate the dimensions at the moment.

yes, the ridge axis must be complied with according to the development plan.

Correct. But the supposed consequence of turning the house sideways under its ridge is nonsense and moves your garden to the wrong side of the property.

This is all much more complicated than I had imagined.

No, it is not complicated, but the planner has a knot in the set square. Below, I have placed your house twice on the plot; once as in the second plan; and once so that the house is aligned with its ridge axis, i.e. ridge axis parallel to the stair axis and thus also "normally" ridge axis = house axis or eaves side long and gable side short and therefore also less difference possible between ridge height and eaves height. My suggestion is of course only a basic sketch to demonstrate the more favorable division of house / garden. To fit into the construction window, several small changes would have to be made, but the roof relaxes as a result.