You extend the roof of the carport over part of the house. That makes the roof bigger, but you don't have to build another roof.To what extent would covering the garage enlarge the ground floor? Or do you mean that the garage would have to be located basically in the basement?
At the very beginning, I saw a picture of a house with a large flat-roofed corner bay window on the ground floor. I thought that was super cool!
That's why it immediately got dropped from the planning againSuch things are especially mega expensive.
But the carport will not be done by the construction company, rather privately by us in self-performance. If you do these "fiddly bits" through the construction company, in my guess the bill will end up just as high – for less living space. That's why I don't see the advantage. Besides, as I said, I don't see a huge saving potential on the upper floor, maybe 10 sqm. Also, that wouldn't automatically get rid of the "stair hatch" you hate...You extend the carport's roof over part of the house. This makes the roof bigger, but you don't have to build another roof.
But the carport is not being done by the construction company, rather by us privately as a do-it-yourself project.
If you have these "fussiness" done through the construction company, my suspicion is that in the end the bill is just as high - for less living space.
Besides, that wouldn't automatically get rid of the "stair hatch" you hate so much...