Building boundary exceeded for semi-detached house

The friendly clerk at the building authority said quite openly that the smartest thing would have been simply to build so that the houses fit together

That may be the perspective of the building permit issuer, the building inspector’s view will certainly be different.

he unfortunately had to act

Yes, that is often perceived as a hard lot.

and ensure that at least the second semi-detached house is built according to plan.

Well, that too would fit the stereotypical narrow-mindedness of a bureaucratic stickler, inflexible and impractical. However, we do not know all the circumstances of this case, so condemning the outcome of the actions would be unfair. Nor do we know – at least that applies to me – all the circumstances of the OP and his neighbors. Free-standing or permitted? Developer or general contractor or general subcontractor or …? Staking out by surveyor or foreman? Site management by architect or owner? Building authority overloaded or cooperative? Necessary construction supervision certificates?

Now the semi-detached houses stand offset from each other, it looks poor and causes additional costs because parts of the walls have to be insulated additionally and unplanned.

Consequences of unauthorized extensions with attentive building authority: building stop, fine, new building submissions, exemption application, supplementary approval. Between the devil and the deep blue sea – the OP must decide. Perhaps he will get infected neither here nor there, certainty only afterwards.

Now I wanted to build and gladly stay within the permitted building envelope.

What does your responsible design author, that is the one who signed the building application, say about that?

Could it be that the building window is 5m? Only your planner interpreted it incorrectly? 5.50 m sounds somehow arbitrary.

Have you talked to the neighbor? He might have built according to the plan.

Could it be that the building window is 5m? Only your planner interpreted it incorrectly? 5.50 m sounds somehow arbitrary.

Have you talked to the neighbor? They might have built according to the plan.

I would take up the suggestion from and submit new building documents (with an exemption request if it is really 5.50m) then wait for the supplementary approval. Maybe you will meet an official who can look beyond the desk edge.

So here, no building inspector ever came to the entire construction area…. Our neighbor is certainly also a bit too far forward compared to his submitted plan … nobody cared

we even specifically obtained a building permit for filling on the east and west sides because it is not allowed according to the development plan … everyone after us just did it in the exemption procedure

So once again to the OP:
Answer the questions from my predecessors …

Who measured, are you building with a general contractor? Do you have a building permit or are you building under the exemption procedure

Please upload the development plan with building zones. Possibly also the text version.

"It is ensured that the neighbor has exceeded." Who says that?

This is what its survey has shown. Despite all communication problems, it does not help to repeatedly ask questions that have already been answered.