House construction in the Ruhr area on existing land

Building authority is sufficient. Property dimensions, building window dimensions. How far can be built over? Terrace outside the building window possible? If the building authority says that a surveyor is necessary, then he is necessary, at the latest when it is finalized that you want to build there. A local/regional general contractor or main contractor with a solid reputation is the right construction partner here. The "center" is questionable.

The property boundary is likely implicitly defined by the exterior wall of the [Elternhaus]. Other divisions make relatively little sense since you have to build on there.

walk along the rows of houses to see what has been modernized/renovated in recent years and what you really like. Because you could just build like that, and if new owners have pimped the floor plan, maybe you can take a look. Young people are uninhibited about it and proud to show it

I know every single neighbor here and their houses from the inside. They are all identical to my parents’ house. Since all the others are just older tenants, they haven’t made any major changes. Modernizations were only done in the sense that windows/roofs were replaced. Or a bathroom was redone inside, but that’s all.

whether the house basically has to look the same in principle as my parents' house.

Exactly such questions are too tiring for me to read in such pseudo screenshots ("+" unfortunately also enlarges the disturbances).

Building authority is sufficient. Plot dimensions, building window dimensions. How far can building be extended? Terrace outside the building window possible?
If the building authority says a surveyor is necessary, then he is necessary, at the latest when it is certain that you want to build there. A local/regional general contractor or developer with a solid reputation is the right building partner here.
The "middle" is questionable.

Yes, I will do that directly on Monday.
And as I said, if anyone has good experiences with general contractors/developers in our area, I would be grateful for tips!

And as I said, if anyone has good experiences with BU/GUs in our area, I would be grateful for tips!

Since: it shouldn't be hard to find such companies mentioned and discussed - after all, the region is not a blank spot on the map, not even in this forum.