150 sqm detached house - demolition & new construction - recommendations?

Unfortunately, no terrace can be accommodated in the garden. The slope on which the house stands is about 30° steep. That is why the house cannot be moved further back. However, the view from the [EG] is very good.

These are infos that would be good beforehand.

Instead of the entrance, plan a terrace; you will be grilling in the south.
Large doors and windows. In summer, the greenery cools quite well

Think about the slope retention demolition construction. We had left the old wall standing Advantage: - no demolition - no disposal - no retention - guarantee that the slope does not slip. More than 30 degrees Disadvantage The house has shifted further forward

It seems to me the internal staircase is the problem, it somehow ruins everything.

Balcony corridor and covered external staircase?