Realistic cost estimate: Single-family house with unfavorable development location

I had such a hard time uploading it because I don’t want to upload someone else’s "work" without credit,

You could have simply named the model: Team Massiv Friesen-/Kapitänshaus 155. For inspiration, you could also check out Viebrockhaus and (don’t be put off by the construction method) Gussek Haus.

You could have simply named the model: Team Solid Frisian-/Captain’s House 155.
For inspiration, by the way, you could also look at Viebrockhaus and (don’t be bothered by the construction method) Gussek Haus.

That simple :oops:? Because of the frequent mentioning of companies with detours (see also "e**Haus* in the thread here), I got the impression that this would be sacrilegious here. But then we can speak freely :D Of course, we have already reviewed Viebrockhaus and Gussek Haus, but the designs with an office/guest room on the ground floor are always just so huge.

In any case, we would insert a wall on the left side of the ground floor that separates a study from the open living area and leave the rest as it is.

I don't find this intervention in the standard floor plan insignificant and it often has a domino effect.
- The planned wardrobe will be eliminated for room access. Where should it go then?
- The dining table will be squeezed into the middle because the couch has to go somewhere. Terrace access is also a question?
- How exactly should the staircase run now? As in the standard floor plan, then the dining table is in the way. If the direction of travel is to be reversed, then the staircase in the upper floor ends in nowhere or is there supposed to be no open gallery?

I’m afraid with your budget you will have to take the risk of being "bored to death."
One connection per meter, here in the relatively inexpensive east of the country, costs 120 EUR per trade on a paved surface. You need at least 3 trades (electricity, water, sewage), so 360 EUR * 70m (possibly even 75, you pay up to the main line, not just the property boundary). Sewage can be even more expensive because a proper sewer has to be built.
Just that alone will cost you 25-27,000 EUR. Plus possibly necessary intermediate "trades."
Oh, and the connections themselves also cost about 5,000 EUR.

We paid just under 15,000 for 5 utilities (gas, water, electricity, sewage, telecom). For 12m from the HAR to the middle of the street.

Whether telecom still digs for a flat 800 EUR at 70m, no idea.

If you have 500,000 all in, then the turnkey house (usually without floors, painter, and kitchen) must not cost more than 350,000 EUR. And then you hardly have any other choice except boring standard houses, and that only with the cheaper providers. Unless you go down to 100m². But then it will probably be too boring after all...

I don’t find this intervention in the standard floor plan insignificant and it often leads to a cascade of problems.
- The planned wardrobe will be removed for access to the room. Where is it supposed to go then?
- The dining table will be squeezed into the middle because the couch has to go somewhere. Terrace access is also a question?
- How exactly is the staircase supposed to run now? If as in the standard floor plan, then the dining table is in the way. If the direction of travel should be reversed, then the staircase ends up nowhere on the upper floor or is there supposed to be no open gallery?

You place the table crosswise, the window by the couch moves up a bit. The living room has plenty of space and whoever wants the staircase including the air space in the living room, go ahead.
You pay for that with tiny kids’ rooms.
The wardrobe can go where the storage room is, no one needs that anyway, it only makes the entrance smaller.

Shower in the guest WC. For those who need it. No one will shower there and then run through the whole house with a towel around their waist to the wardrobe.

The floor plan easily wastes 10 sqm for a "twist." Alone because the large hallway hardly makes sense without the staircase, but the staircase in the living room takes up a lot of space. And this air space... you can hardly burn space and money better.

I don’t find this change to the standard floor plan insignificant at all, and it often drags a whole lot of consequences behind it. - The planned wardrobe will be dropped for the room access. Where should it go then? - The dining table will be squeezed into the middle because the couch has to go somewhere. Terrace access is also a question? - How exactly is the staircase supposed to run now? Like in the standard floor plan, then the dining table is in the way. If the direction is supposed to be reversed, then the staircase on the upper floor ends up nowhere or is there supposed to be no open gallery?

The wardrobe would go into the storage room. The dining table in the middle in the "bay window". Terrace access behind the sofa. The staircase should run as it does with the professionals, not like with me :D I wish I had uploaded the floor plan from Team Massivhaus right away; mine was really just schematic.

Thank you very much, that’s exactly the answer I was hoping for! I’ve now contacted the suppliers again in writing and hope to get a clearer statement about the connection costs. Unfortunately, we don’t have 500,000 saved up, but that would be the amount we dare to take out as a loan (or the difference to our own capital). And the thing about being boring sounded a bit flippant from me, I admit that, but we currently live nicely and therefore we’re not under pressure to build a house that we’ll only regret later. So rather than building something completely boring just because the budget only allows that now, we’d rather wait a few more years and save up a bit more equity. I will discuss the objections in your second thread with the family; we really fell in love with the staircase in the open space, but also think there are good counterarguments here.