Floor plan for a single-family house with 200m² with a separate apartment 75 + basement 140m² + garage 56m²

I will not say anything about planning with 3 children's rooms without having a suitable partner yet. Omitting the basement is perhaps not the worst idea, otherwise it will be a monster of a house, in case things turn out differently with family planning.

I can only strongly recommend involving an architect, without any specifications, only with your space requirements. Having your own draft redrawn cleanly is, in my opinion, fatal! For example, the dressing room: How do you want to use it with 4(!) doors as such? No reasonably sized wardrobe fits in there, it is just a walk-through room. You have apparently already realized this yourself by drawing a wardrobe in the master bedroom, but then what is the purpose of a dressing room? And then both in the main apartment and the granny flat these strange mini-hallways. Once between office and bathroom with 3 doors, and in the granny flat there are even 4 doors. Do you really want to have it like that? These are just 3 examples why an architect needs to be involved. Unfortunately, everything looks like Tetris.

During the waiting time for the architect’s draft, we also went wild with planning ourselves, but we only did that for us and to get a feeling. No one other than us has seen that plan, and that was for the best. It’s not for nothing that people study for this...

Honestly, I don't really understand your statement? Did you build a house after you were two, then another with the first child, and then another house with the second child? And now you are building the next house for 3 children? In my family and circle of friends, planning is done first and then building. The planning stops at the number of children's rooms. Of course, only if nothing unplanned happens (which always happens).

The standard family today has 2 children and therefore the house has 2 children's rooms. If you look at ready-made designs from house providers, you almost always find 2 children's rooms. I just wanted to say that it is hard to find a finished floor plan with 3 children's rooms. By the way, I have not yet built a house and have always lived in rental housing so far, so you can move if the space is no longer sufficient. :D

Unfortunately, nothing is planned yet here because it doesn’t fit in too many places. Take a look at the ground floor, you are planning an office and BATHROOM directly opening onto the terrace, right? I would always plan the kitchen and dining area near the terrace. I have attached something from our planned house + property for you. The access road is where the arrow is and the terrace faces south.

From my point of view, it is very important that you become clear about your needs and wishes. Because even an architect will only plan the house and draw the floor plan based on your wishes. If you plan past your needs and budget, you haven’t achieved anything. Think about what is a "must" and what is a "nice to have," not everything can be accommodated in one floor plan.

Unfortunately, I cannot understand your argument? Which rooms can I leave out?

He rightfully means that a floor plan does not only consist of walls, doors, and windows. Or one could also say that rooms in a house are joined where there is a lot of passage that is possibly not private, then the rooms are connected with hallways. But one does pay attention to where it does not invade privacy, to harmonious transitions without doors, but also beautiful and enriching sightlines, if the size or budget allows it, while one must say that sightlines cost nothing and the word is actually only used for outdoor areas. One could also say alignments.
A hallway itself does not have to have a door; otherwise, one would get tired of doors if they are distributed senselessly. Through alignments without doors, one gets fewer corners, which is also positive in its effect.
Although we "planners here in the forum" often use the wordplay Tetris, the art in our Tetris is also to bring the colors together so that exactly here between the figures the wall and thus also the door could be omitted.
One might think that you played Tetris too seriously ;)

By the way, as a tip: doors are not placed arbitrarily in rooms where heavy or bulky cabinets are placed, preferably so that the cabinet can be placed behind the door hinge; in other rooms so that either there is a sightline without a door, none with a door, or one does not necessarily "bump into" the furnishing.

So far no terrace is planned (financially), and everything should be green at first, and then it will be seen where one likes to spend time most. A small terrace was planned behind the house and between the house and the garage, but that will come much later.

You already need the planning in the building application. The main terraces must be approved. In most LBOs, the terrace must not be in the distance areas.
Even if one plans to realize something later, a plan should basically be created beforehand where something can and should still be realized later.
With you, there is a complete lack of any private living spaces away from the street towards the garden. I see no "normal" life at all between the house and the garden. After all, the garden is the summer extension of the living room, a living space where one would also like to furnish oneself.

I must confess: ... I don’t understand the house and both apartments! I am very open to many kinds of living structures, but I cannot comprehend this house design. It resembles more a utility building like a farm when it comes to the relation of house to property.

a living room facing the street (south side), sorry, I had not mentioned that before,

And why is that? What is the focus here? On the street? South side? On the side-by-side so that mom is always there and can watch you at the grill? (Where is that supposed to go?)
And if you want a bunch of children, how is the narrow hallway at the top of the plan supposed to work?

because of possible divorce, a marriage contract would be mandatory

First comes the step of staying together. And there you are working on a few screws so that the target group shrinks considerably. One must know that, so you, and as far as I'm concerned, the topic will not be discussed any further.

I was told that a hip-and-valley roof is almost as complex as a gable roof with two dormers,

we do not want to argue about taste here, but the roof does look somewhat "out of place" ;)
Dormers would at least have a use, but I already planned without dormers in 1999 because they simply make the building cost unreasonably higher when you don’t need them. But you will need dormers with the single-story design. Because that simply won't work otherwise.

For example, the dressing room: How do you want to use it as such with 4(!) doors? There’s no room for a reasonably large wardrobe, it’s just a pass-through room. You apparently already realized this yourself when you drew in a wardrobe in the master bedroom, so then what’s the point of a dressing room?

There is already a hallway drawn in the dressing room, how many wardrobes do you think are needed? I have a 2.5m wardrobe in the dressing room and 2.8m in the bedroom. Do I really need 7 to 10 meters of continuous wardrobes?

Once between the office and bathroom with 3 doors and in the granny flat there are even 4 doors. Do you really want it that way? These are just 3 examples why an architect needs to be involved. Unfortunately, it all looks like Tetris.

In some other floor plans it was always said that there should be a door between the bathroom and the living rooms. For me, this is a must, so I ask you how it is supposed to work without doors?

From my point of view it is very important that you become clear about your needs and wishes. Because an architect will only plan the house and draw the floor plan based on your wishes. If you plan beyond your needs and budget, you have achieved nothing. Consider what is a "must" and what is "nice to have", you can’t fit everything into one floor plan.

The advantage of Tetris is that the pieces fit well together.

For example, the dressing room: How do you want to use it as such with 4(!) doors? There’s no room for a reasonably large wardrobe, it’s just a pass-through room. You apparently already realized this yourself when you drew in a wardrobe in the master bedroom, so then what’s the point of a dressing room?

There is already a hallway drawn in the dressing room, how many wardrobes do you think are needed? I have a 2.5m wardrobe in the dressing room and 2.8m in the bedroom. Do I really need 7 to 10 meters of continuous wardrobes?

Once between the office and bathroom with 3 doors and in the granny flat there are even 4 doors. Do you really want it that way? These are just 3 examples why an architect needs to be involved. Unfortunately, it all looks like Tetris.

In some other floor plans it was always said that there should be a door between the bathroom and the living rooms. For me, this is a must, so I ask you how it is supposed to work without doors?
The advantage of Tetris is that the pieces fit well together.

From my point of view it is very important that you become clear about your needs and wishes. Because an architect will only plan the house and draw the floor plan based on your wishes. If you plan beyond your needs and budget, you have achieved nothing. Consider what is a "must" and what is "nice to have", you can’t fit everything into one floor plan.

I thought I did that right at the start:

I thought I did that right away and so far I find my design very fitting:

my apartment:

[*]Parents’ bedroom (only one door) + dressing room + private bathroom (shower + [optional large bathtub])
[*]3x children’s rooms (min 15m²) with separate bathroom (shower + [optional bathtub])
[*]2x offices
[*]Living room (min 20m²) with fireplace
[*]Kitchen (min 15m²) + [optional kitchen island]
[*]Dining room for 5 persons
[*]Bathroom downstairs + [optional shower]
[*]1 sauna inside (or outside)

granny flat:

[*]Standard with office

Wishes:

[*]Between bathroom and living rooms there must be an additional room/hallway
[*]All rooms with windows (at least the bathrooms)
[*]Laundry room (upstairs)
[*]Access to the garden (north)
[*]More light/volume in the entrance area
[*]Pantry

Although we "planners here in the forum" often use the word game Tetris, the art in our Tetris is also to bring the colors together in such a way that exactly here between the figures a wall and thus also the door could be omitted.
One might think that you played Tetris too obsessively ;)

I loved Tetris and also Sudoku, that’s why I still find my plan so good so far and have only planned one improvement in the kitchen, namely a door to the garage again.

By the way, as a tip: doors are not placed arbitrarily, in rooms where heavy or bulky wardrobes are placed, best so that the wardrobe can be placed behind the door hinge, in other rooms so that you either have a view axis without a door, none with a door, or you don’t “bump” into furniture with the door.

Okay, I have now partially rotated and slightly moved the doors, but that does not fundamentally change the floor plan.

You already need the planning for the building permit. The main terraces must be approved. The terrace is allowed in most building codes to not be in the clearance area.
Even if you plan to implement something later, a plan should basically be created beforehand where something can and should be implemented later.
In your plan there are totally no private living areas away from the street toward the garden. I see no "normal" life between house and garden at all. The garden is, after all, the extension of the living room in summer, living space where you want to furnish comfortably.

Thank you very much for the good explanation. I have marked the terrace in turquoise and the paved paths in yellow for better assessment. Also the planned use of the plot: 2/3 for me and 1/3 for the granny flat (mother).

And why is that? Where is the focus? On the street? South side? On the proximity so that mom is always there and can watch you at the grill? (where will that be?)

The south is important because of natural sunlight, at least I don’t know anyone who wants their living room facing north.

And if you want a bunch of kids, how is the narrow hallway at the top of the plan supposed to work?

Until just now I thought the hallway is extremely wide with about 115 cm; at work the hallway with 20 people is only 5 cm wider (DIN 18040 part 2) and I personally prefer large rooms rather than a wide hallway. How wide should a hallway be planned in your opinion, 130 cm?

Dormer windows have at least a use, but I also planned without dormers in 1999 because they simply increase the cost of building the house disproportionately if you don’t need them. But you will need dormers because of the single floor. Otherwise it just doesn’t work.

I think that’s the difference, am I right in assuming you were allowed to build with two full floors? Then a flat roof would also be fine for me. I just looked it up and in at least two articles it said that a hip roof does not have to be much more expensive than a normal gable roof, depending on skylights and materials.

two full floors

Again: YOU can only have one floor, so you need dormers to light the middle windows. What you have drawn is two stories.

In some other floor plans it was always said that there should be a door between the bathroom and the living room. For me that is a must, so I ask you how it should work without doors?

Try not to create new hallways everywhere just because your Tetris doesn’t fit. Because what you have are placeholders, basically unsolved Tetris.

Okay, I have now partially rotated and slightly moved the doors, but that doesn’t fundamentally change the floor plan.

That was just a tip/advice.

The south side is important because of natural sunlight, at least I don’t know anyone who wants to have their living room in the north.

Well… step out of your apartment comfort zone: The dining area takes the place of the chill area, because you don’t need daylight to watch TV. South-facing light is even counterproductive. Children, who spend most of their time in the dining area, need daylight for playing and crafting at the big table. And more than 115cm width to walk into the garden. Besides, other household members also use the path to the garden, so 115cm can be called a bottleneck. In addition, playing children in the garden should be able to be observed for a few years from inside over the living area (kitchen).

Until just now I thought the hallway was extremely wide at about 115cm,

I loved Tetris and also Sudoku, that’s why I still find my plan good so far.

That’s why you also forgot the chimney flues upstairs? ;)

I have a 2.5m wardrobe in the dressing room and 2.8m in the bedroom. Do I really need 7 to 10m of continuous wardrobes?

I am happy to repeat what I have already written before: Why do you need a dressing room if the wardrobes don’t fit in there? In other floor plans, the wardrobes are in the dressing room because – as the name suggests – that’s where you keep your clothes and dress. In the bedroom there is then only a dresser, if anything at all. But in your case, the main wardrobe is in the bedroom because the dressing room has so many doors that you can’t use it for its actual purpose or only a 2.5m wardrobe fits in there. For me, that is a walk-through room and badly planned.

In some other floor plans it was always said that there should be a door between the bathroom and the living areas. For me that is a must, so I ask you how it is supposed to work without doors?

Yes, of course there has to be a door. But a 1.29 sqm mini-hall from which 4 doors lead off is unnecessary and not nice. But that’s what happens when you think it only depends on:

The advantage of Tetris is that the pieces fit well on top of each other

For me personally this is not logically planned, but everything is just somehow squeezed in. But if you like it that way and it is your dream house, then everything is fine.