Ideas for a detached house approximately 155 m², 2 full floors

So 11.18 x 9.16m just happened to be that way behind the decimal point and is not a standardized width measure from a prefabricated house provider?

Hello Katja, it is a solid house, not a prefab. The information comes from the developer's offer.

We can also go with square. But so far we have been with the design to have more garden.

There is nothing against a non-square rectangle; it is often better than a square: you have to be able to "afford" a square, it only "works" (similar to a single-flight straight staircase) properly from about 12 m house width onwards.

So 11.18 x 9.16 m just happened to come out with those decimals by chance

9, 11, 16, 18 – once you have four correct numbers, you keep using them on all further lottery tickets

I'll take a look at Mittelrhein.. But we have already gone through many floor plans.

Same here. That's why I know quite well which providers with their building proposals come closest to the builder’s own design. They have many functional proposals in this size both with single- and double-flight straight staircases (and also with 45° rotated staircases, which are not a gimmick).

And me first. Therefore, I know quite well which providers come closest to the builder's own design with their construction proposals. They have many functional proposals in this size, both with single and double-flight straight staircases (and also with 45° rotated staircases, which are not gimmicks).

Do you get the floor plans after requesting a catalog? Or anywhere online? PS: I will try that as lottery numbers...

Or also somewhere online?

Dasmassivhaus de - in my opinion, the suitable series are called Domus (~XL).