Since you have similar conditions. Do you already have a cost calculation that you might be willing to share with me? I think that would be a great help for us. ... What reasons do you think speak against a room above the garage?
Maybe first: we will build with an architect and single contract award. The cost estimate is based on his experience, the soil report, and the height survey = I also recommend this to you. Accordingly, we will have about 140 sqm gable roof with basement. In the basement (240 cm room height) there will be an office and guest room, i.e. about 30 sqm of living space, the rest storage and technical room. The requirement was as large as necessary, as small as possible – it should function without restrictions. Costs: we are building in the Rhine-Main area without own work and are opting for controlled residential ventilation, raised living space on the ground floor to about 275 cm, anthracite-colored windows, 2 bathrooms (one of them just a shower bath), many windows, and possibly a lift-and-slide door. No KNX, no fireplace, no balcony, no bay window or similar. 465k incl. incidental costs plus garage Room above garage: you are building quite large. Just integrate the room into the house. There is space. Would you like to live above the garage? I wouldn't even as a guest... We are planning with 2 children and even a third would still have space in the office or guest room.