Single-family house with walkable green roof carport on a slope

For the 50 sqm, living/dining/cooking is usually combined. Your house is not small. You have more rooms. Kitchen-living room and dining room instead of a large open space.
Small bedroom with dressing room instead of a large room. Why not? We had also planned a small bedroom with an adjoining dressing room. During construction we removed the wall. It was too tight.

Fingers crossed for the floor. The earthworks are extra, right? Is the back wall and static requirements already included in the price? The structural engineer calculated an insane reinforcement for us and made the ceiling slab even thicker

For the house with slab foundation and basement, we have a fixed price. The slope/pressing water etc. is taken into account. We have not yet fully finalized the carport. Waiting for the final price. Earthworks are separate. Once the hole is there, and we know what it actually cost, I hope I will be a bit calmer.

Do you already know your future neighbors?
Building gaps and being in the village is a special combination but it also holds a lot of positive potential. Just imagine it if you haven't done so yet.
It can be very helpful during (and of course also after) the construction phase. With a small plot you sometimes have to move things out and it leads to obstructions. If you get along well with the neighbors, they will also watch over the construction site for you...
We, for example, made an appearance at the village festivals right after purchasing the plot and our neighbor knew the plans before we submitted the preliminary building inquiry and later the building application.

Something can still happen, building will be more expensive than planned, but the big question marks are the earthworks and the support.

Even with large plots not everything fits on there. We have 400 sqm of steep slope and not a single 90-degree angle. The plot burst at all seams despite over 1200 sqm.