Land planning for a triangular plot

I would also prefer if my 76-year-old father adopts a living situation more suitable for him. But that won't happen. What happens to the other house is of secondary importance to me for now. In the course of the division, my brother will probably get the house with the remaining property - with appropriate compensation to me.

As far as the garden is concerned, it looks like this according to the building inquiry. The house on the right then has the garden to the south.

What happens to the other house is of secondary importance to me for now.

Really? As far as I can see, you are blocking your father or his successor from the terrace and the balcony. It would be interesting to know how the rooms in the old house are currently oriented? Is a south-facing terrace possible without any issues? Are modifications necessary for that? If so, who pays for them? Apart from that, doesn’t your planned house with the south-west tip lie within the distance zone?

South terrace is easily possible there, the living room is also located there. The balcony faces west, adjoins the two children's rooms, and was actually never used. The kitchen is located in the northwest corner, below it the dining room. Below that, in the southwest corner, a patio. Overall, I think it is manageable.

What function does the wall by the street have?

Wurm initially answers the architect's request positively and then the office backtracks?

Or did the architect's question look different?

I am surprised that setback areas are simply not observed. I would have rejected that at first as well.

I would have tried it this way.

South terrace is easily possible there, the living room is also located there. The balcony faces west, adjoins the two children's rooms, and was actually never used. In the northwest corner is the kitchen, below that the dining room. Below that, in the southwest corner, is a patio. Overall, I think it's manageable.

That's what I thought. So it will be pitch dark in the kitchen. I would be very upset about that and far from "manageable." But for the little son... well, that's another story. Normally, the old house would have to be replanned and rebuilt, and that would be on your tab.

The earth mound - no idea, the parents did it that way back then, maybe they didn't know what to do with the excavated soil. It is a dead-end street with little traffic. A hedge would have done just as well. The city did not reject it because of the clearance areas, it is permitted up to the middle of the street (§6 Building Code NRW 2018 Abs 2). The reason for rejection is the outer area issue and the undesirable precedent effect for the remaining plots further along the street.