Terrace planning for a corner terraced house with a large garden - What to consider?

Ask him how he would solve it, what his recommendation is:
a) best technical solution and impact on material consumption
b) best optical solution and consequences on the technical side and material consumption
c) cheapest solution and consequence on the technical side

And then you can come back here again, whether he's talking nonsense or not.

The risk that he simply adopts your ideas but nothing comes of it (either because it's not good or he can't do it) is too high.

Hello,

how would you build the terrace? I have 60 by 120 large slabs.
So in the front I am building 4.20 deep and the house is 7m, I want longer, at least 8.50. In the picture I have drawn it in, if I make the terrace 2.40 from the bay window outwards and extend the strip straight as it looks. In the corner I have also made a bed. In total it would be 75m2. The idea was only 3m in the bay window area, otherwise the strip around it narrower.

Is the terrace too big? I don’t want everything paved, but because of the corners we are paving, 74 m2 quickly arises. And I am unsure whether I should have a splash guard built.