Suggestions for the floor plan of a single-family house about 175 sqm, gable roof house

10 sqm more living space was offered to us for 17k EUR

...I would commission that 10 times without seeing it :D

10 sqm more living space was offered to us for 17k EUR.

I would like to take that twice, with a raised eyebrow for 30k

We have initially planned about 10-12k for the staircase. Which doesn’t mean it can’t be simpler as well.

A staircase is primarily there for one purpose, namely so that the residents can beam themselves on foot between the floors. What secondary purposes are your other expectations for a staircase, and with what priority? a) to make the banal act into a sensual experience as a walkable sculpture b) to bring a touch of Hollywood glamour to Mettmann c) to impress the Hoppenstedts we know from the theater subscription d) to give the staircase builder the chance to show all his skills There have to be some reasons why the staircase is supposed to be an amulet against the evil spirits of zero-eight-fifteen after all.

Then it would be interesting to know what exactly is included in the ancillary construction costs when the outdoor facilities are already listed together with the kitchen. We mainly had fees there. These were considerable but not 50K.
Otherwise, prevention is of course better than stepping in it.
Maybe you should have your financial plan made much more precise soon.
What would be totally stupid is if you have 40K left over afterward and the dining area is actually too cramped.

Yes, we may have calculated more cautiously because everyone warns that it always gets more expensive. And because the garage is currently on hold.
We have actually included the ancillary costs of purchasing the property in the ancillary construction costs (notary, land registry entry), otherwise soil survey, surveying, construction power and water, insurances, foundation buffer, and the connections up to the property rather generously, because this cannot yet be calculated exactly.
Overall, we already have a fairly concrete cost calculation in Excel form. To make this more precise again soon, there are appointments this week with the kitchen and staircase builders and for the flooring.

So you mean we should consider snapping up the 10 sqm for 17k ... :) Then at least 5 sqm could be used to arrange the dining area more comfortably and we would probably still forgo the covered entrance and add the corner to the utility room, which would probably make another 4-5 sqm. But maybe someone has an idea where the front door could / should be placed then or if access to the utility room would still go through the kitchen, e.g. to the drinks crate, or rather from the entrance / hallway area?

or rather from the entrance/hallway area?

Entrance to the utility room through the hallway,
you don’t want to see craftsmen going from the hallway through the living room through the kitchen into the utility room.
The utility room window out, and instead put in a terrace door,
with us the craftsman van is parked with the side door open in front of the tiled utility room, with the laundry it goes straight out to the drying rack,
just some reasons from us for that

I haven’t read all the feedbacks yet, but I’m still going to write my feedback now based on the draft on page 15 (I think it was page 15?). The empty space in the living area seems huge, lost, and wasted to me. Furthermore, even with the laundry chute, I would want to carry the washed laundry through the kitchen. The utility room is also way too narrow and small for that. Unfortunately, these days the utility room is always underestimated and everyone wants to pack everything in there. And then they cut and save one square meter. Are you putting a storage room under the stairs? The kitchen also seems much too small to me—definitely no saving here. You spend so much time in the kitchen. Or is there going to be some kind of kitchen extension on the side where the toilet is? Meaning behind the dining table. Then the niche should be at least 60 cm. Nevertheless, the workspace is very small. I like the upstairs area. However, I still don’t see any use for the gallery and would therefore maybe even plan a utility room upstairs to do the laundry there. The laundry is generated upstairs as well.