Prefabricated house construction - who creates the plan for the earthworks?

Hello everyone,
I am new here and looking forward to meeting some of you :)

We plan to have a prefabricated house built turnkey by a provider, whereby we would then contract a basement construction company for the foundation slab.
This basement company must receive a plan for the earthworks, right?!
One that shows exactly where on the property the house will be located, at what height it needs to be placed on the property, that soil from the back of the property is to be moved forward for leveling, and that the garage’s foundation slab needs to be placed here or there. Things like that.

Who creates such a plan? The prefabricated house company?

Many thanks in advance and best regards,
Alex

Who creates such a plan? The prefab house company?

Yes. Either you buy the base slab through the house company, then everything runs hand in hand. That is best. Or you yourselves are the contractor for the base slab, then this service (creation of plans by external parties) would very likely be an additional service from the house company, which they would charge you for. Many prefab house manufacturers have their preferred base slab/cellar partners with whom they cooperate. I would always have this service handled by the house company because of the warranty.

wow that was quick

Thanks for the response and have a nice evening!

The civil engineer can plan that with you as well.

I recently saw a house where the builder planned the property line incorrectly. It shouldn't be done that way.

Who submitted the building application? The property plan is mandatory there. Please upload it here, then we can take a look to see if it works well like that.

We plan to have a turnkey prefabricated house built by a provider, whereby we would subcontract the foundation slab to a basement construction company.

I would (as the Bavarians nicely say) "never ever" release a house provider from the responsibility that the house and its foundation slab fit together exactly. So why actually decide on a "prefabricated" house?

Soil is to be pushed forward from the back of the property for leveling,

Your avatar includes a woman in a wheelchair – how does that go together with a property that needs leveling? (Sloping terrain rarely has a moderate ramp gradient)