Floor plan optimization, single-family house, city villa 12x12m

Instead, look for an "external" architect who can give you a realistic cost estimate

…and creates a sensible floor plan.

Oh, you wouldn’t do any more? Why not? Really out of interest!

That has other reasons than sound and honestly, I don’t know how to explain it :p Because of the air space, the house seems “smaller” because it is more open. Also because of the front door in the line of sight with the living area. Although the house has 200 sqm, it doesn’t feel like it because you always have the front door in view. That is purely psychological...

that has different reasons than sound and to be honest I don’t really know how to explain it :p
Because of the airspace, the house appears "smaller" because it is more open. Also due to the entrance door being in the line of sight with the open space.
Although the house is 200 sqm, it doesn’t seem like it because you always have the entrance door in view. That is purely psychological...

Ah okay, I think I know what you mean. Interesting, I wouldn’t have come up with that idea at all!

...
Although the house is 200 sqm, it doesn't feel like it because you always have the front door in view. That's purely psychological...

So should a well-proportioned house with an open space have at least about 250 sqm to 300 sqm? Or an angle to the line of sight into the open space so that the view from the open space to the front door is interrupted? :)

I would at least not paint the front door anthracite on the inside anymore but white. Then it won't stand out as much. Those are of course all first-world problems ;)

The discussion about air space yes/no is not new here. I have an air space, whereby mine was made soundproof at the top with an all-glass wall. I don't notice any heat loss. I still love this view from the double-height window front and would therefore build the air space again. The glass wall is an alternative if you absolutely want air space but are afraid of sound transmission. My house does not feel smaller to me, rather more spacious when I look at the tall window front. However, you also need a nice view for it to be worthwhile.