Build a terraced end house with an additional unit (GÜ) on your own

Let's be honest, 11ant, like many others, advised you from the beginning not to build there. With the current knowledge and the great neighbors, building authority, and property, you probably wouldn't build there anymore, would you?

Of course, it was somewhat foreseeable, but you shouldn't blame him for that now. At least he tried everything to make it possible for the neighbor. However, the municipality probably should have designated rows with basements and without basements from the outset. Such a mix was sure to cause trouble.

Let's still keep our fingers crossed that it somehow goes smoothly. No idea how the whole thing looks legally in detail!?

Many other builders build in the area quite normally and without problems, coordinate with the neighbors, for example, dig deeper in advance so that the other neighbor can build a basement, etc. – that can work quite well.

Our way to the house was not easy either – but that is rarely the case when building.

We had already bought our plot of land back in June, until the neighbor moved up in November. By the way, the only plot that remained unsold for so long.

For us, the plot was without alternative: price okay, short distances to school and daycare and to my wife’s work. Convenient for me in terms of traffic. Aldi, Lidl, and EDEKA within walking distance – two large highways right outside the front door. You don’t have much choice in our region.

Many other builders in the area near us do it the way you described - that would have been fine with us too, saving us the 12cm and 5000 € for the insulation.

Probably a dummy question, but I don't understand what is bad about an additionally thick wall and insulation in a row of terraced houses. Isn't more wall and insulation a great thing due to soundproofing?

Many other builders build normally and without problems in the area, coordinate with the neighbors, for example, digging deeper in advance so that the other neighbor can build a basement, etc. – that can work quite well.

Our access to the house was not easy either – but that is rarely the case when building.

We had already bought our plot in June, until the neighbor moved closer in November. Incidentally, the only plot that was not sold for such a long time.

For us, the plot was indispensable: price ok, short distances to school and daycare and to my wife's work. Convenient transport for me. Aldi, Lidl and EDEKA within walking distance – two major highways right outside the door. You don’t have much choice in our region.

Sooner or later you will also have normal, nice neighbors, then everything will be forgotten. Only stories with entertainment value will remain, which probably no one will take at face value.

Probably a dummy question, but I don't understand what's bad about an additionally thick wall and insulation in a row house block. Isn't more wall and insulation a great thing because of soundproofing?

Thermal insulation is unnecessary since the other side is not exterior.
Sound is basically not reduced by ETICS. Just use 20 or 24 cm calcium silicate brick on the neighbor’s side and then it's quiet.