ᐅ Changes to the House and Floor Plan After Submitting the Building Permit Application

Hello,
a general question—although it doesn’t directly affect me right now, I find it interesting to know. Let’s assume the building permit application / planning permission has been submitted: What changes are still allowed without the application needing to be reviewed again?
Obviously, major changes are clear—especially those affecting structural engineering, legal regulations, design guidelines, etc.
Also, smaller things like changing a bedroom into a children’s room or having a door open to the right instead of the left, and so on.
I’m more interested in those kinds of changes that aren’t so clear. Maybe we could compile a kind of list here as a general overview.
I’m particularly curious about:
- The spacing of the heating pipes for underfloor heating
- Changing the heating system from gas / condensing boiler to an air-source heat pump
- Position of the house (e.g., 3 meters (10 feet) backward or forward)
- Changing the garage from one large space to two rooms separated by a wall
- Adding an extra window in a room

It would be great if others could contribute here (including from their own experience) so that a brief overview can be created. This might be interesting for some.