Great! Now the discussion is exactly where I wanted it to be. And now things are much clearer to me!
I also wouldn’t know how it should get brighter because of that.
Once there is a deep ditch behind the house and the slope rises steeply, it is darker than if you fill up the slope behind the house to the first floor, then have a flat surface there and the terrace a few meters away from the house.
But I also see light as one of the main problems. Am I right in assuming that in the architect’s design there would be no windows on the south side (=boundary development)?
Thank you for pointing that out so explicitly here. I overlooked this problem and the architect probably first considered the wish to connect the monument.
Over what period and are there no limits?
You can depreciate 9 percent of the renovation costs annually over 10 years. If I invest 200 thousand in the monument, that's 18 thousand depreciation per year, a huge advantage. After that, I can still depreciate 7 percent if I rent it out.
Where to put the terrace
The whole slope faces south. So, if the terrace is above the house, you have sun all day. You just have to walk a few meters. The terrace on the west side, i.e. towards the street, would only be the second choice. I would like to set up a second seating area there, but I find the privacy in the garden more pleasant.
I somehow still can’t imagine that you’re allowed to build directly on the northern boundary. So it would rather be like in your suggestion.
The architect and we are equally uncertain because there are only building pre-inquiries here for such information. That takes a terrible amount of time for such a simple question and to get ideas. In "my idea" from the first post, we would have mostly free boundaries, I could build windows to the south and further up the slope there is no house to the south anymore. Then a dining area with lots of windows to the southeast, maybe a conservatory as you say. In any case, it has to be the upper floor, preferably with ground-level access.
We are right up to the slope and the slope-side wall on the ground floor is a retaining wall.
That’s exactly how I would like to do it as well. Then I would also need soil that I take from the slope for the ground floor and fill the ground behind the retaining wall. Is that really so much more expensive that it explains the general skepticism here? You also have such earthworks with a simple basement.
If you build without a direct connection to the monument there are other possibilities and maybe windows to the south after all
By now it feels really good here to think things through together. Meanwhile I am also convinced that the disadvantages outweigh the advantages. Maybe I will be allowed to build next to the northern neighbor. I don’t want a window there anyway and can then make the terrace to the southeast. Parking space for the car then in front of the house.