Floor plan 9x11.30m, 4 people, 2 offices

So first of all:
Apart from minor details, which can be fixed with some wall adjustments, I would consider the design buildable as well as functional and nice.
(if the orientation SN is not added)

Then everything is fine :)

However, I do not see that, because the office is too narrow.

Please fill it out! If the basement is not within the budget, we don’t need to discuss any details here because everything will change.

If you want to know the changes I propose (after the budget is known), let me know, then I will sit down briefly and show you the changes.
regarding ’s objection: Neighbors initially did not finish the room (children’s bathroom), but waited for the children blessing – meanwhile, the room served as a storage room.

The idea of finishing the room on demand is interesting on the one hand, but more expensive on the other. Water and sewage connections still have to be installed, including underfloor heating. However, in the bathroom, a lower temperature is usually chosen than for example in the living room.

Many thanks in advance for your input!

Please fill it out! If the basement is not included in the budget, we don’t need to discuss details here, because everything changes.

If you want to know the changes I suggest (once the budget is known), let me know, then I’ll sit down briefly and show you the changes.
Regarding ’s objection: Neighbors initially didn’t finish the room (children’s bathroom), but waited for children to arrive – meanwhile the room served as storage.

We are tied to a prefab house provider who markets the property exclusively. We also have an offer for a house of the same size etc. – with a basement. So that fits the budget.

Looking forward to your ideas :)

2 and 3 are missing.
And 4. THREE doors in the dressing room. You will then have less closet length than we do in our approx. 6 sqm. What is the armchair for? Is there some kind of fashion show going on there?

We still need to find out what different knee wall heights cost. Currently we have 1.60 m in the plan, possibly we can increase that. Then there is also the possibility to put more cabinets here. But sure, the dressing room here is just a passage room with many walkways and doors.

Thank you very much for your input!

We are tied to a prefabricated house provider who markets the plot exclusively. We have an offer for a house of the same size, etc. – with a basement. So that fits the budget.

So that means real estate transfer tax on the plot AND the house?

So it means real estate transfer tax on the land AND the house?

Yep, we have to live with that and it's still within the budget

Yep, we have to live with that and it's still within the budget

Please make sure the price lock-in period is appropriate. We don’t want the BU to take its time with the planning and then demand an increase of x%. A 10-15% increase at that price can be a dealbreaker.

You still owe me answers on a few points... :-)

The idea of expanding the room as needed is interesting on one hand, but on the other hand more expensive.

More expensive, not expensive - exactly.

Water and sewage connections still have to be installed, including underfloor heating.

Installing the connections there is not that expensive. And underfloor heating doesn’t matter where it is located: 9 x 11 remains 9 x 11.

In the bathroom, however, you usually choose a lower temperature than, for example, in the living room.

That has nothing to do with the floor plan or the children's bathroom issue. Apparently, the OP wants a children's bathroom. I personally don’t like children’s bathrooms either, but this is about the OP’s plan, and the children’s bathroom doesn’t hurt: it doesn’t take away necessary space from any room and apparently the OP can afford it. However, I would point out that here you are planning 3 showers for currently 2 people plus guests. That can be worked on – especially since the guest room will never really be a bedroom anyway. So, now I wanted to show the improvements, but I have to realize and also say that the plan doesn’t work at all, because the basement stairs are blocked by the AB access. Exactly for this reason, I wonder – also because the prefabricated house manufacturer, to my knowledge, is not responsible for basement construction – whether the price concerning a basement, finished and apparently developed as a living basement, is actually safe. From experience, nothing is safe, certain, or available if you don’t mention it here. Usually, OPs manage to get through here without a clue regarding the budget.