Concrete building size in the construction window unclear

I would ring the neighbor's doorbell and ask him about his architect and his building plans. Apart from possible deviations in the interior layout, I see here largely only a younger twin of his house coming into being.

I would ring the neighbor's doorbell and ask him about his architect and his construction plans.

That's exactly how I would do it too. But only after the land purchase is finalized.

That is the plan. Thank you all for your participation!