How tall is the neighboring building exactly? Are there balconies facing your direction? How far away is the house?
Do you know if construction is also planned on the west property in front, and if so, how? What does the development plan say about the neighboring property?
800 sqm is already a luxury here. But if you don’t have access from the house to the garden, you basically don’t need the garden.
Take a walk through some new housing developments in your area to get a feeling for how construction is often done today. Here, two of your houses are sometimes built on 800 sqm, and then you can’t see the sky from the sofa because the next house is so close.