Own floor plan design 135 sqm opinions and experiences

Hello everyone,
we have an approximately 650sqm2 plot and are planning a single-family house with a gable roof of about 135sqm. Currently, the exterior dimensions of the house are 10.8x9m. The knee wall is currently about 1.25m, but measured to the unfinished floor. The position of the house on the plot is already fixed for us due to the orientation and the building boundary. The terrace is almost facing south with a very slight tendency to the east. The plot is somewhat larger towards the south than shown in the picture.

Our wishes were
- a straight living-dining area
- about 4m of kitchen units on one wall
- small office on the ground floor
- half-turn staircase
- small cloakroom in the hallway
- entrance area not too narrow
- staircase not in the dirty area
- not to build too large

Actually, we were almost finished with the self-planning and I was just working on the detailed planning. The longer you wait, the more thoughts come up.
The utility room was planned on the west side because the house connections are located in the west/south corner of the plot. The bathroom is directly above it.
Now comes my wife's strong wish to mirror the house so that the utility room faces east towards the neighbor and the office towards the garden/street.

The argumentation:
- You spend a long time in the office and that side is nicer
- The utility room forms a unit with the garden part on the west side, which is also intended as a work area with a shed.

The problem is that the bathroom and bedroom are not to be swapped. We need a minimum of 3.4m width for the bedroom and this cannot be realized that way. I have already spent hours trying to find a solution.

What do you think about the swap regarding the house connections and the longer water line inside the house from the utility room to the bathroom?
Do you have an idea how the problem can be solved? By now, we would also give up the half-turn staircase, but even with another type of staircase I have not succeeded so far.

Otherwise, I would also appreciate feedback regarding other things. Many thanks in advance.

Now comes my wife's strong desire to mirror the house so that the utility room is located to the east towards the neighbor and the office faces the garden/street.

The idea of persuading the sun to rise in the west from now on finally brings fresh air to the discussion "abolish daylight saving time yes or no."

We were actually almost finished with the self-planning and I was just in the detailed planning. [...] and that cannot be realized like that. I have already spent hours experimenting.

Does that mean, if you had been satisfied (or had remained satisfied) and no complications had arisen, you would have pressed the general contractors with the "detailed planning"?

Before I go to a general contractor with the plan, I would still do my own detailed planning, such as ventilation pipes, ventilation boxes, final window sizes, etc. However, as described above, we are now in a dilemma that cannot be resolved.

Forgot to mention, by the way, the kitchen should also face east because the view of the house from the street, in combination with the utility room door and window band, is not pleasant to look at.

Where the house stands on the plot is already fixed for us due to the orientation and the building boundary.

Well, then you should post a proper plan of the plot with measurements and details of the building window as well as planning floor plans with a few more measurements. And generally maybe follow the post: .

Because maybe you have to start planning all over again if the room requirements change.
That could be, for example, separating the connection/technical room and utility room with washing machine, placing the entrance on the street side, or whatever.

because the house view from the street, combined with the utility room door and the ribbon window, is not pleasant to look at.

If you think that's the case, then you might as well do without the ribbon window, because it is an optical design (because you want to present it) as well as a planning detail for facades so that, among other things, no one can look inside.

I would still do my own detailed planning, such as ventilation pipes, ventilation boxes, final window sizes, etc.

Oh, you are very confident. Even the long-established, most senior, and veteran members of the forum do not dare to talk the experts into that.

Before I go to a general contractor with the plan, I would still make my own detailed planning, such as ventilation pipes, ventilation boxes, final window sizes, etc. However, as described above, we are now in a dilemma that cannot be resolved.

In the second sentence you admit not being able to proceed in a Leistungsphase 2 topic, but in the first sentence you feel competent regarding Leistungsphase 5: are you an HVAC planner? (otherwise that hardly fits together).

Oh, you are quite confident. Even the long-established, most senior and senior members of the forum do not dare to do that – to talk the experts into it.

I have been doing residential planning for four decades (far, far more single-family homes than multi-family residential buildings) and professionally evaluate the competencies of the providers. I use my expertise to have a say, but leave proposing concepts to the experts of the executive branch who are technically up to date on a daily basis. In building services engineering there are hundreds of standards, which it would be hopelessly uneconomical for me as a relatively generalist planner to learn by heart. These are very extensive fields on their own. To some extent, as a conductor, you also have to be able to trust that the orchestra musicians master their instruments.