Thank you for your suggestions & tips!
@ manu:
How would you arrange the bathroom? It is only important to us that you don’t look directly at the toilet from the door.
@ Bauexperte:
The washing machine, dryer, a freezer (100x60cm), & the heating system are to be placed in the utility room. That space should be sufficient? Everything else would go in the storage area under the stairs & upstairs in the storage room.