Bungalow floor plan 160-170 sqm with basement

No, the wishes are clearly defined and also feasible. However, no one here understands, and it is also not defined as your wish, that everyone and everything walks past the children's rooms and does not grant them peace in the evening. That they are virtually exposed to the open concept entrance/living area, and if they need to use the toilet, they have to expose themselves to every visitor and also to the outside towards the street, thus having no privacy and intimacy. You are not the only builder with your wishes, but you are certainly not one who implements them well.

I have to agree..

Oh, I love bungalow themes.

We also have a bungalow (I’m attaching the floor plan). My lessons learned:
1. Separate children's area: forget that in a bungalow! Due to the single-story design, you’ll never be able to separate it cleverly. The rooms are basically within calling distance. And I have to admit, especially with young children, I love it. My kids learned to play alone in their rooms when they were just one year old because they saw me working around the house. The advantage is also that later you can call out from the kitchen. But since we don’t want the kids to hear us when we get active in bed, we put the bathroom in between.
2. In a bungalow, never, ever have the main bathroom in sight of the living room door. When my husband has visitors, I want to be able to slip into the bathroom unseen in just my bra. We weren’t so considerate with the kids, but then we were selfish.
3. Basement: I understand you, but really consider whether you’d rather finish the attic (we have a half-hipped roof). There you have storage space, can move a child there if needed, guests can sleep there, etc. So basically build a single-family house almost classically. You can "separate" the top floor from the house just as you can with the basement.
4. Don’t make the hallway too small, but not too big either. In a bungalow, I find the hallway quite important because all paths cross here. I don’t even know how often I walk through the hallway each day. Since it’s so central, it should also be "cozy."
5. With most bungalows, you can tear out walls as you want. For example, we don't have a single load-bearing interior wall. So currently, upstairs we have our junk room and climb up by ladder. When the kids move out, one will get a proper staircase and the other room will be enlarged a bit. Then we’ll have a guest room and an age-appropriate staircase upstairs.
That also means, if necessary, you can build or move necessary walls and tear out unnecessary ones.

I don’t like those maze-like bungalows at all. For me, this house type represents closeness and togetherness. You see everything, hear everything (to my son’s dismay, “Mom, how did you know I was secretly watching tablet?”). You have to want and like that. If you separate everything from each other, at least the children's rooms belong upstairs. That’s a bit awkward with the very little ones, but by the time they’re three, it’s no problem anymore.

You have correctly recognized that the needs for a house change with the life phase. You just haven't realized yet that one: 1. All these different needs can only be accommodated in one house with inefficiency and many compromises 2. The law that you only build a house once in your life was never written, let alone enacted. It would also conflict with the wise saying that the first house is built for an enemy, the second for a friend, and only the third for yourself.

Ah, I love bungalow topics.

We also have a bungalow (I’m attaching the floor plan). My lessons learned:
1. Separate kids' area: Forget about that in a bungalow! Due to the single-story design, you’ll never be able to cleverly separate it. The rooms are simply within calling distance. And I have to admit, especially with young children, I love it. My kids learned to play alone in their room as early as one year old because they saw me tinkering around the house. The advantage is also that you can later call out from the kitchen. But since we also don’t want the kids to hear when we get active in bed, we squeezed the bathroom in between.
2. In a bungalow, never, ever have the main bathroom visible from the living room door. When my husband has guests, I want to be able to slip into the bathroom in a bra unseen. We weren’t so considerate with the kids’ bathroom, but there we were selfish.
3. Basement: I can understand you, but really think about whether you’d rather convert the attic (we have a half-hipped roof). There you have storage space, can move a child out if necessary, guests can sleep there, etc. So in the end, a single-family home built almost classically. You can separate the upper floor from the house just as well as the basement.
4. Hallway not too narrow, but not too big either. I find the hallway quite important in a bungalow because all the paths cross there. I don’t even know how many times a day I walk through the hallway. Because it’s so central, it should be “cozy” as well.
5. In most bungalows, you can tear down walls as you like. For example, we don’t have a single load-bearing interior wall. Currently, the attic is our junk room and we climb up with a ladder. When the kids move out, a proper staircase will be installed in one room and the other room slightly enlarged. Then we’ll have a guest room and an age-appropriate staircase to the top.
But that also means that, if necessary, you can install/move required walls and tear down unnecessary ones.

I don’t like these maze-like bungalows at all. For me, this house type embodies closeness and togetherness. You see everything, hear everything (to the chagrin of my son: “Mom, how did you know I was secretly watching my tablet?”). You have to want and like that. If you separate everything from each other, at least move the kids’ rooms upstairs. That’s still a bit awkward with very small ones, but at the latest by age three, it’s no problem anymore.

Wow, thank you so much for your input...
I actually really like your floor plan... What are the dimensions of the house? Or do you happen to have the floor plan with measurements?
Where is the TV placed in your home? We find 20DN visually interesting... so extending is not practical... The floor plan really fits our ideas quite well... Thanks for that... do you have a fully covered terrace?

Wow, thank you very much for your input... I actually really like your floor plan... What are the dimensions of the house? Or do you have, by any chance, the floor plan with measurements? Where is the TV located in your home? We find 20DN visually interesting... that's why the expansion doesn't make sense... The floor plan really fits our ideas quite well... Thanks for that... do you have a fully covered terrace?

Gladly. I have attached the complete plan. The TV is on the wall panel between the kitchen and living area or hangs there. A small downside: the sun shines on it during the day. That hardly bothers me, my husband always lowers the roller blind on the large window. A good TV compensates for that quite well.

We also initially wanted a low roof pitch. Due to a planning error (hip roof was not allowed), we had to switch to a half-hip roof, which required a significantly higher roof expansion. Now I have to say, I think it’s great. We have "headroom" up there and the house has something of the reed-thatched coastal houses that I really like.

The terrace is only about 1/3 covered. But we also have a huge one measuring 5x9 m. In front of the bedroom window, a 5x5 m cover will be added in the next few years.

What helped us a lot was seeing a bungalow from the inside once. I still remember my grandparents' bungalow. Typical for that time with a very long hallway and extremely separated private area. I always found that annoying. If you’re ever in NRW, you can come visit us ;)

Now again, very slowly... not that we all didn’t understand that ;)

Then you have the entire 2nd floor completely empty...

We never advised you to have “a second floor”!

With the basement, we would create more flexibility, since many rooms disappear there... Also laundry room etc...

Define basement! Isn’t a basement a “floor”?
By the way, one does not speak of floors, but of stories, and then there is also the definition of a “half-story”… but let’s get to the point:

So you are planning ground floor + basement, because a ground floor + converted attic is 2 floors, and ground floor + basement is two floors? o_O

You are bothered by a staircase leading to the attic floor, but not by a staircase to the basement. o_O
You put necessary rooms like laundry room, technical room, storage room in your other story (basement), even though the staircase might cause problems someday. o_O
You are giving yourself an argument that is basically untenable, because you are planning two stories anyway, so with stairs. If you’re unlucky and have knee problems at 50, that will be an obstacle for you.

Furthermore, you are planning "2-3 living rooms with daylight" in the basement. That means: you are planning 2-3 additional recreation rooms in the basement, i.e. finished with electricity, bathroom? (there was something said about parents) (-> lift system), heating, ventilation, appropriate daylight illumination and a ceiling height that turns a basement room into a living room, so that it is even allowed and approved to stay in. You get daylight only with special daylight shafts in a basement story, i.e. proper windows and then huge excavation, there are several options. However, these all have the property of being on the house’s outer wall (because they are basement windows) and pose a risk of accident to children playing in the garden (I don’t even want to start on burglary protection).
So they must be secured accordingly again, but so that they still provide the second escape route. -> fall protection, escape route from inside to outside.
All of this turns a simple basement into a residential basement.
Meaning: 180sqm basement = 180,000€
180sqm basement with living quality (I am assuming half, since technical and laundry rooms do not have to be finished, but adapted to ceiling height), that is 90sqm basement + 90sqm living basement = 300,000€
The roof remains cold, but you have 180sqm of space that no one sees because it disappears in the basement. Most of the space is not needed anyway (180 for a basement is really a lot) and if the kids have parties down there, two rooms on the ground floor suffer.

But with 2-3 living rooms with daylight, the kids would have retreats there in their teen years or later...

We want everything ourselves on one level....

As already said, you are not the first to come up with an idea of a bungalow.

According to your argument, it would be more logical to lead your basement stairs up into the attic, because it is there anyway. Just leave out the basement.
The rooms that are still necessary in old age or with knee problems are also planned on the ground floor (You remember: “We want everything ourselves on one level....”). Small technical room, laundry room near the kitchen… all bungalow-like, and all for you.
One room that can be useful for small children close to the parents and then two rooms plus bathroom in the converted attic, which the children can move into once they reach school age. A construction effort hardly worth mentioning, maybe 50,000€. Windows that look at the sky instead of the concrete look of a light shaft.

That would be a room separation (children//parents). And when the kids leave the nest, the two rooms in the 40sqm attic don’t hurt if they lie fallow, are converted into a fitness room, or the grandchildren sleep there sometimes. In any case, you would have your level and whatever is upstairs does not bother you.

Where is the catch now?
You invest 250,000€ more for less living comfort, then later have a huge basement that you possibly can’t enter for doing laundry in the worst case, and also have two empty rooms on the ground floor… and you think: I wish I had the technical and laundry rooms here instead…