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

We have also insulated the entire wall, since it was not clear at the time of the start of construction how the middle house would be built.

It doesn’t matter how the other one builds. The load-bearing exterior wall aligns flush with the property boundary (OK, leaving 2 cm of air). The places where the houses do not overlap will be insulated afterwards. That’s how everyone builds here.

It doesn't matter how the other person builds. The load-bearing exterior wall closes flush with the property boundary (OK, leave 2 cm air). The places where the houses do not overlap will be insulated afterwards. That’s how everyone builds here.

If you agree with the neighbor. Because that would require insulation on the neighbor’s property, which is not tolerated under neighborhood law in Baden-Württemberg during new construction.

And since the property had not yet been sold at the start of construction in October, no one could coordinate with anyone.

In your case, everything is already built anyway, so it doesn't matter. Future builders should still consider building without cavity insulation. Under the same conditions you describe, this is at least possible in northern Germany.

And since the plot was not yet sold at the start of construction in October, there was no one to coordinate with.

The owner was then the city. But whatever, they probably wouldn't have agreed anyway.

And of course: Good luck! I hope things work out well for you! I'm really sorry about how it escalated

In your case everything is already built anyway, so it doesn't matter.
Future builders should still consider building without middle insulation. Under the same conditions you describe, this is at least possible in northern Germany.

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

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

But that is currently your smallest problem. I am also keeping my fingers crossed and hope that there will be a happy ending.