So I will show my dream house to the builder.
Or to Uncle Günter's dachshund, that could amount to the same thing. Builders like to formwork and bricklay - people who like to tinker are called engineers.
Let's not misunderstand each other: not all builders think in a straightforward way. But with a fairly high probability, the builder will only be able to imagine the project if the basement floor plan resembles a subset of the new house floor plan.
However, that would not necessarily be within the realm of possibilities, but smarter concepts call for an architect.