ᐅ Carport attached directly to the house? Canopy over the main entrance?

Hello everyone,

I just need to clear up some questions and ask about your experiences.
We are planning to build a house on a plot of about 550m² (5920 sq ft) (see sketch).
The house should be placed as far "down" on the sketch as possible (southeast) because we want to maximize the distance/space at the "top" of the plot (northwest). I hope I have explained that clearly.

Originally, I wanted a double carport with a storage room behind it, but I think that takes up too much space (about 9m x 6m (30 ft x 20 ft)?). Therefore, we are now considering a single carport with a side storage room (blue sketch).

Another option would be to build the carport directly attached to the house and skip the house entrance canopy (also marked in blue), simply extending the carport to replace the entrance canopy. Do you understand what I mean?
At the moment, I’m a bit hesitant about attaching a carport directly to the house because it won’t be built by the main construction company. I am concerned about sealing between the carport and the house, and if there is any damage, who would be responsible, etc.

Maybe this is all completely unproblematic? What experiences do you have?

Has anyone placed a carport similarly and integrated the house entrance canopy this way?
What would you do?

Thanks and best regards!
Anmacatili