Length of the garage underground?

Building a new driveway also costs money. Developing a slope from below is often a bit more complicated than from above.

It’s not about replacing a driveway. It remains, does not have to, and/or will not be altered by the parking lot. The parking space // underground garage is in competition here. Well then: the architect will still mention it or include the price of the underground garage with special depth in the fee :)

How is one supposed to calculate anything here without a plan?

Site plan with the house and garage drawn in is the minimum. Don’t forget the topography.

How big is the garage supposed to be?