House construction in the Ruhr area on existing land

The property boundary is probably implicitly defined by the outer wall of the main house. Other divisions make relatively little sense since you have to build on there.

yes that makes sense - the only thing that would probably work is if, as seen in the picture, the terrace is reduced in size and the balcony on top is omitted, then you could probably get more living space, but I don't think you can do much differently.

I will definitely get informed about this now.

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

Sorry for asking...
I am currently going through the forum, sooner or later I would certainly have come across this thread. But thanks to you, I already have it now...

Building authority is also reachable by phone and email. Corona? They should also have the 1:100 scale plans of the parents' house. So that one can estimate how to build the house without a basement.

The property should have boundary stones. Then you don't need a surveyor at first. The data is also all available in the Geoatlas NRW. That is sufficient for the conscientious planner. Extending an existing building is easy.

We can also do more with the plan from the Geoatlas.

Just look for the boundary stones and then you can measure.

Building authority is also reachable by phone and email. Corona? They should also have the 1:100 plans of the parents' house. So you can estimate how to build the house without a basement.

The plot should have boundary stones. Then you don’t need a surveyor for now. The data is also all available in the Geoatlas NRW. That is sufficient for the conscientious planner. Adding onto an existing building is easy.

We can also do more with the plan from the Geoatlas.

Just look for the boundary stones and then you can measure as well.

I actually didn’t know that – thanks, I’ll take a look at what I can find and yes, if I can’t get further by phone, then at least certainly by email. That already puts me one step further and I can make things more concrete.

Alternatively, you can also sketch what you want to build and then submit a preliminary building inquiry. This way, you have it in black and white what they will approve. Such a thing should be handled by the architect or the planner from the construction company for you. We can only give tips.

Alternatively, you can also sketch out what you want to build and then make a preliminary building inquiry. Then you have it in black and white what they will approve. Something like that should be done for you by the architect or the planner from the construction company. We can only give tips.

Yes, you have already given me a lot of great input, thank you very much for that. As I said, I have absolutely no idea about this whole topic and am slowly getting my head around it. I am now trying to get as much information as possible and then talk to the companies to see if anything like that is even feasible within our budget. Because if they tell us no, that we can't get anything decent for €350k or that it is simply too little to even build something new, then the matter is settled anyway despite having the plot of land.