The other way around: the non-full storey in the attic may only have this height on less than two thirds of the ground floor area or exceed it.
"Full storeys are storeys whose ceiling upper edge on average protrudes more than 1.40 m above the ground surface and which have a clear height of at least 2.30 m over at least two thirds of their floor area. Cavities between the top ceiling and the roofing that cannot accommodate rooms are not considered storeys."
My ground floor area is 12m*16m = 192 m².
That means at 2/3 = 192m² * 2/3 = 128 m².
The area with more than 2.3m in my case is exactly 128m².
The area with less than 2.3m in my case is exactly 64m².

For simplicity, you can also just consider the upper or lower part up to the midpoint.
So about 42 days for masonry and electrical work?
I am always in favor of not holding back young enthusiasts, but here I see black. Such a huge house even with occasional help from friends — I’d rather guess 6 to 7 months, provided one keeps their job.
Thank you very much for your comment. I really appreciate your remarks because they are very concise and show me that I probably miscalculated. I had estimated 4 months and that 2-3 people would help me every weekend.
...and good health cooperates. Many people underestimate the physical strain.
That is incalculable, but I understand what you mean. If I break an arm or a leg, the construction site will come to a halt and everything will be delayed by several months.
Me too. One data point. If I hold our little house at most against that... masonry + ceilings per storey took about a week with a crew of 4 if I remember correctly, so let's say 50-60 man-days for 2 full storeys plus attic. Electrical rough-in was 2 men for one week, so 10 man-days. Ytong, so easy to cut, build, and chase.
Here you have to at least double everything, rather more. We are then talking about ~150 man-days for the two trades. But floors and painting are still missing, which also take several days at this size. Even if you are a fast worker, you will need 4-5 times the 42 days. Then there are other trades from the family who will also expect the builder to help if they do it at family prices. That is no longer done just on weekends and “dad/buddy/... helps”. Working full-time and spending all your free time on the site quickly wears you out.
Thanks for the calculation example, I will have to recalculate that again after the floor plan planning.
Apparently, you didn’t understand exactly what I criticized. I criticized the same thing as st3lli83 on the first draft, namely the tiny hallways and the dressing room that is a walk-through room. You have now also become aware of this through st3lli83, as you write.
You see that correctly. Here is an example from the perspective of an electrician who is called due to a lamp problem:
[*]Light bulb burned out.
[*]Light switch not confirmed
[*]Emergency switch confirmed
[*]No light bulb in the lamp
[*]Cable break
[*]Switch defective
[*]Fuse tripped
[*]Cable damaged (drilled through)
[*]A loose connection?
[*]etc.
This was your answer to me, so sorry that I didn’t understand directly from you why something might be wrong there.
Otherwise I continue to advise you to go to a proper architect and have the plan drawn according to your space requirements.
The drafter asked for a template, so I will do that. I am here for a floor plan planning, or what else is this subthread for? And so far a lot has been written here, but two questions have not yet been fully clarified. Floor plan planning means for me, what is needed?
[*]What should be upstairs and downstairs? The utility room can be in the attic.
[*]How big a room should be. The utility room in the attic could be bigger.
[*]Where to place the house and/or garage, so for me the garage on the boundary or 0.5 m away from the boundary.