Floor plan and extension of a house - Year built 1966

The bathtub directly at the knee wall? How is one supposed to get in there?

Where there is enough headroom for a toilet, there is also room for the tub. I don't think the house is small either. However, two questions arise for me: Who makes the children's beds upstairs? And What do you do in the bedroom with a panoramic window front? I already find balustrade-free designs exciting on the upper floor, but then also across the entire side, so that when naked you don’t even have a little wall behind which you can hide from views... apparently also towards the street. It’s definitely stylish - but I wouldn’t want to live there.

I am not a structural engineer, but I think you would need one. As far as I can see, you want to remove some walls on the ground floor. In our new build, we also have a very large open-plan room and we had to have it calculated separately and pay a considerable surcharge for more steel in the concrete ceiling so that it is structurally possible. In the original plan, we had a support pillar next to the kitchen island.

Where there is space for a toilet at head height, there is also space for the bathtub.

I have marked the 2 m line. However, standing urination is necessarily prohibited there.

For the complete renovation, all walls up to the top of the new window height will be removed, then a ring beam will be installed, and on top of that the extension will be built in timber panel construction. The existing brick walls will be insulated with wood wool and will receive a curtain facade

This all sounds very much like "a layperson reading about stylish pipe dreams on the internet," and such concepts regularly die in bank meetings (which is, to put it nicely, "not to the detriment of the project goal"). I agree with the suggestion to show the existing plans and pictures of the house as well as to create synoptic plans, and I suspect a bungalow. The continuation of this with the basement stairs located in the corner does a grave disservice to the floor plan. More convincing solutions can be found with facts about the existing structure. Economically, this "renovation" would be a costly Pyrrhic victory ;-)

Hello and thank you for the answers.

Economically, this "renovation" would be a fancy Pyrrhic victory ;-)

I am not firmly convinced that a renovation is necessary when a new build only costs 50k more. It’s not like you couldn’t get a new build for 450k if I use my floor plan as a basis.

I’m not a structural engineer, but I think you’d need one.

Without an architect and structural engineer, nothing will be built. But it will be a wooden ceiling and should be doable.

Who makes the kids’ beds upstairs?
What do you do in the bedroom with a panoramic window front?

If I can no longer climb the furniture stairs (thanks Sol), then the kids should be old enough to do it themselves.
The panoramic window works because the street is far enough away and our area is already very quiet and green. The view is definitely worth it. Directly in front of us are only trees. To the left and right is a house on the other side of the street.

Where a toilet fits head-height, the tub also fits.

The toilet can be moved further forward, but peeing only works sitting down. That’s not a problem.

Are there pictures and plans of the existing building?

I have attached a sketch of the stairs. It should work. There would still be room for one more step.

If you’re already planning yourself, then please do it properly. Demolition is shown with yellow dashes and the new build in red. Original remaining black.

I know, it was only supposed to be for me. I thought it would still be helpful.

70 cm exterior walls on the ground floor?

Please ignore the outer line. In the end, that depends on the construction of the necessary insulation with curtain facade.

Standing seam is a very expensive facade and roof covering.

What would be a cheaper facade?

The missing entrance area and lack of a wardrobe are more suited to a small holiday home than a family house.

A holiday home is a nice place to relax, that’s exactly what we want to have with our house. But seriously, it brings the evening sun into the house and we miss that a lot.

Wood beam ceilings require substantial beams with appropriate bearings for such spans. Or some supports. Large, open spaces are better achieved with concrete ceilings.