12x9.6m 2 full floors, basement, attic, 4 children's rooms

We have solid wood ceilings, a full 25 cm thick + filling + screed. In principle, it should work. I don't think they are cheaper than concrete. We have a solid wood house; with solid stone on stone, I would instinctively choose concrete. My neighbors designed the house dimensions so that precast concrete parts could be used for cost reasons.

Take what your builder can do. The unknown will be more expensive, and better is questionable.

The budget is tight for this size. I don't want to say it’s not doable, but you can forget about KNX, photovoltaics, and the like. Doing work yourself will hardly be possible with 4 children. You will need a Nordlys setting. The water from the Ikea faucet is the same as from an expensive designer faucet. What do we really need? If someone doesn't drink coffee, they don't need a fully automatic machine just because it's trendy.

OK, it’s already good that you need soil anyway. Friends of ours suddenly had a five-figure problem with their excavation.

Definitely take a look at these threads. Nobody really tells you the truth, sometimes something is forgotten, but that's the problem of the builders.

I already have all the offers and according to my assessment, with similar equipment you will definitely reach the 450k€.

Hello Haydee, hello Zaba12,

thank you for the hints. I am quite aware of the cost issue, but first of all, it is about the floor plan.

Yes, although the floor plan will be scrapped again if the money is not enough. There is potential for savings, but once that is exhausted, the only option is to build smaller.

450,000 minus additional construction costs, garage, outdoor facilities, you are well under 400,000 for over 200 sqm of living space + basement + attic. If the [Baukindergeld] does not come or your income is too high, you are closer to 300,000 than 400,000 for the house.

Building small is not an option. With 6 people, the living space is almost a must. The basement also makes sense. Consider including the attic as finished living space and planning the floor area smaller.

Otherwise, get offers based on Kaho’s floor plan. Definitely draw in your furniture with realistic dimensions. Think of a play area, Christmas tree, etc. This will change the floor plan again, but the price not so much.

OT: I didn't catch that. What is Baukindergeld and how much is it?

still active participation. I think it's great!

And all just with the cheap trick that you can also see the pictures

I find the facades rather modularly composed.

Overall, the floor plan concept seems to me as if it was simply based on the largest rectangle that can fit into the building envelope. This is not really the royal road to beauty. Try a counter-thesis (almost doesn't matter which one - the main thing is to change the way of thinking).