House construction in the Ruhr area on existing land

You could possibly build somewhat narrower, but longer, and place the official terrace facing west. The second terrace then to the south. This way you also achieve some privacy regarding your parents. *if it has to fit into the building envelope. Otherwise: make use of the building envelope. I cannot read the screenshots/photos from the screen.

When it comes to energy consumption, your parents save real money if you insulate the large wall with your house.

Do you get the property transferred to you, otherwise won't both houses belong to your parents?

I cannot read the screenshots/photos of the screen.

Press + then it works.

Press +, then it works.

I have an iPad, everything is different there...

According to my investigations, the property should be 24*43.5 m. Even 2 terraced houses would fit on it.

According to my investigations, the plot should be 24*43.5 m. Two terraced houses would even fit on it

If you can read the plan, then have a look whether the terrace must be within the building envelope. 500 sqm is quite a lot... I am a bit confused about the size of the building envelope and cannot assign the size.