Floor plan single-family house approx. 160 sqm - suggestions for improvement?

The reason for the gallery is that we would like to have a large window that extends over two floors as a highlight of the house.

Isn't the central stringer staircase highlight enough? - a "small" house like that shouldn't be overloaded either.

A house with a shed roof would fit into the development plan; a few plots away (same development plan) there is a house that is similar to our wishes.

If that was built without exemptions, I assume someone precisely explored the limits of what is possible down to the centimeter.

The deduction of the bathroom as well as the air space from the floor area ratio results from the statement of the gentleman at the building authority,

The floor area ratio is naturally calculated according to the standard valid at the time the development plan came into force. However, that would then probably "in reverse" also exclude the technical room on the ground floor - maybe that should then be more advantageous upstairs.

Try to get 4 straight exterior walls.

With the eaves height and also with a lot of calculating to avoid a full floor, I see that becoming tight.

Staircase looks very small.

Calculated at least for very slim people, and steep.

Yes, the staircase seems to be only about 270 cm long. Too steep and quite narrow. I refer once again to the common staircase layouts included in post 1 of .

And with that, every further word is almost superfluous. If the staircase doesn’t fit, the rest doesn’t fit.

Still, as a supplement, when planning the furnishing on the upper floor, one should sensibly also consider the 2-meter line from the roof. For example, I see problems for the person who sleeps at the top in the double bed.

With a eaves height of 450 cm, the actual knee wall will be max. 100 -110 cm, I estimate. That’s why the windows on the upper floor don’t fit or are just all skylights.

Basically, also always scale the house correctly into the site plan of the plot. Then you can see whether other house shapes might possibly be more favorable.

The bathroom and dressing room are very large, but the hallway with stairs appears too small and too narrow. There is no storage space. The house is too small for an atrium; better to create a storage room instead. The bedroom will also not work well. And yes, the sloping ceilings must be taken into account. This will make the rooms upstairs even smaller. Children's rooms of 11 sqm become 8 sqm...

Good morning,

thank you very much for your answers.

Unfortunately, four straight exterior walls on the upper floor with a room height of 2.5m will not be possible upstairs. We are now trying again without a bay window and cutting out a bit in the ground floor to reduce the external dimensions for the floor area ratio. A part of the terrace below will then be covered.

Although the gallery is generally considered a space hog, since it is deducted from the floor area ratio, it is a "highlight" that even has a positive effect on the calculation.
I understood the note about the eaves height, but I have a question about it:
If the ground floor has a room height of 2.6m, and you subtract the intermediate ceiling (0.5m?), that results in a knee wall height of 1.4m, right?
The land here in the north is as flat as can be.

Currently, we live in a semi-detached house with a knee wall height of 1.3m; below this are the head parts of the beds. I do not find that disturbing.
The shed roof will be an offset shed roof, so we will have slopes to the north and to the south. As mentioned, there is a house here that (hopefully) comes very close to ours.
The gentleman from the building authority said that this would be approved again 95% (I know this is not a legally binding answer, but somehow you have to start ).

I will adjust the staircase, thanks for the hint.
I will also draw in the furniture.

but since it is deducted from the floor area ratio, it is a "highlight" that even has a positive effect on the calculation.

But you don't build a highlight if the rooms below have to suffer.

I have taken away that a utility room upstairs might have a positive effect on the floor space index.

If I now plan a laundry room as a children's room in the plan (meaning with connections for a washing machine) and mark it accordingly: Will it be checked after the house is built whether the connection is also where it should be according to the building permit?
At the moment, as I said, we live in a (rented semi-detached house) and I have also looked at the floor plan of it, and according to the floor plan, the storage room (without any connections or anything similar) is currently in the children’s room. It is the same development plan.
The technical room downstairs would remain for heating, electricity, water boxes.

Our problem is actually the low floor space index. When the development plan was created, these were former settlement plots with a minimum size of 1500sqm – so such low floor space indices make sense there.
In the context of densification, it is already difficult to find a plot over 400sqm, so one wonders how to place a single-family house for 4-5 people on it...