Bungalow floor plan for 3 persons, 130 sqm, please opinions...

Yes, that's completely enough. You just have to get a bit creative with the furniture and occasionally rearrange it. I always rearrange my son's furniture from time to time, depending on which part of his Lego army he is playing with. There’s also a certain minimalism involved. My son wants a big Lego set? Then he has to think about where he wants to put it. Does he really still need the big Playmobil castle?
In my daughter’s room (the smaller one), there is a mid-height loft bed, underneath the book box and a cozy mattress (70x140), otherwise a horizontal Kallax shelf (4x2), a desk, a play kitchen, a dollhouse, and as a wardrobe, 2 Kallax shelves. Still, she has plenty of space to walk and build.

One must not forget that the rooms are not seen through our eyes, but through children’s eyes. For them, 10 sqm is big. And when they get older, they don’t need any more space either. Every step is too much :rolleyes: My husband’s eldest had pulled the TV cabinet next to his bed so that he only had to move minimally. And I don’t think children need a sofa in their room later on.

https://www.hausbau-forum.de/threads/grundriss-bungalow-160-170qm-mit-keller.38758/post-491251

Here I once took pictures of the children’s rooms. In my daughter’s room, the bed is now elevated, the "bed" at the back right has been moved under the bed, and the desk is now by the window.

Yes, that's completely enough. You just have to get a bit creative with the furniture and occasionally rearrange it. I always rearrange my son’s furniture now and then, depending on which part of his Lego armada he’s playing with. There’s also a certain minimalism involved. My son wants a big Lego set? Then he has to think about where he wants to put it. Does he really need the big Playmobil castle anymore?
In my daughter’s room (the smaller one) there is a mid-height loft bed, underneath it the book box and a cozy mattress (70x140), otherwise a horizontal Kallax shelf (4x2), a desk, a play kitchen, a dollhouse, and as a wardrobe 2 Kallax shelves. Still, she has plenty of space to walk and build.

You mustn’t forget that rooms are not seen through our eyes, but through children’s eyes. For them, 10 sqm is big. And when they get older, they need just as little space. Every step is too much :rolleyes: My husband’s eldest had pulled the TV console to the bed so he would have to move as little as possible. And I don’t believe children need a sofa in their room later on.

https://www.hausbau-forum.de/threads/grundriss-bungalow-160-170qm-mit-keller.38758/post-491251

Here I once took photos of the children’s rooms. For my daughter, only the bed is now raised, the "bed" at the back right moved under the bed, and the desk is now by the window.

The desire is to have access to the terrace between the kitchen unit and the island and the sliding door to the living room in order to vary between open and closed living. The living room should remain facing west to take advantage of the view. One idea would be to expand the main house with a pitched roof upstairs for children's rooms and a children's bathroom, but to keep the remaining rooms on the ground floor. The thought behind this is whether the space for a large staircase is worthwhile and whether the costs will not explode in relation for the roof expansion and water upstairs?