ᐅ Floor Plan and Space Considerations for a Detached Single-Family Home

Is it true that I am fully bound to an approved preliminary building inquiry?
For example, is it not possible to build smaller than previously specified?

Regarding built-up areas on neighboring properties:
The east and west neighbors have built approximately 60 to 80 percent of their land areas with houses/barns/garages.

The preliminary inquiry is not approved—it only tells you whether an application with the same content would have no chance or not. You cannot generally say "smaller is always possible."

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BastianBW schrieb:

Am I completely bound by an approved preliminary building inquiry?

No. A preliminary building inquiry is done to save money. Specific questions are asked, and the submitted documents are only prepared to the extent necessary for the authority to answer these questions. If, after analyzing the surroundings, you are unsure whether you may build a three-story house with a ridge height of 12m (39 feet) above street level directly on the property line, you do not have to submit finished floor plans including setback calculations and fire protection concepts. A site plan showing the location, height, and number of stories of the neighboring buildings and a corresponding building volume on your lot is sufficient. Only the questions posed will be reviewed and ideally approved. The fee charged corresponds only to the scope of this review. When the full building permit application is submitted later, these points will no longer be re-examined, reducing the subsequent fees accordingly. However, if your plans differ from the initial concept, for example if you decide to build only two stories, a re-evaluation is required and full fees apply. Also, building too small may violate the integration requirement under Section 34 of the Building Code.
Most preliminary building inquiries focus solely on planning law (Building Code and Land Use Ordinance), since the planner does not need to invest much time and effort into the room layout and extensive calculations only to find out later that three stories are not approvable. In your case, this is insufficient because the neighboring buildings do not comply with current regulations. There are deviations disadvantageous to you under building regulations. From the outside (forum), the situation cannot be assessed, as much now depends on the interpretation of the case officer at the approval authority. It is therefore especially unfortunate that no one there is willing to discuss the project with you and the planner in advance.
Hence the dilemma mentioned earlier: for meaningful answers, your project must be very concrete. The more detailed your preliminary inquiry, the lower the potential savings, and the fewer the possibilities for variation later on.

What is your opinion on this floor plan?
The idea of divisibility was removed,
the staircase and utility area have been moved inside the house.
Personal opinion:
Is the upstairs bathroom too large? Is the dining area sufficient?
Buildable? (Load-bearing walls, etc.)

Thank you very much

What matters here? Just the concept, or should the approximate dimensions be included as well?
If you use the exterior dimensions, it will become very tight in some areas, causing the design to fail. (Wall thicknesses)

ypg schrieb:

What counts here? Just the concept or also the approximate dimensions?
If you take the external dimensions, it gets very tight in some areas, causing the design to fail. (Wall thicknesses)

I forgot to adjust the wall thicknesses.
The exterior walls will therefore be a bit thicker.
I will update that, thanks.
Otherwise, I’d also appreciate opinions on the room layout and division.