Start with the programme
List what each setting needs to do and who uses it. Separate everyday family life from occasional entertaining, service access and private retreat. Test the relationships before fixing room boundaries.
Design the relationships.
Then design the rooms.
A multi-level home begins with the transitions between shared and private life.
Read the section
A plan describes one level. A section reveals what happens above and below: overlooking, vertical routes, shared volumes and daylight. Review both together before committing to the arrangement.
Resolve the interfaces
Coordinate stair and lift access, acoustic separation and building services with the spatial idea. The most memorable room still needs a practical route for maintenance.