Ideally a physical address should point to a public entrance. Such an address can be geocoded.

Locating a person or business from that entrance is a separate concern. Which must not involve 3D or indoor maps.

Where in the world do you live that there are no multi family homes?

>Locating a person or business from that entrance is a separate concern. Which must not involve 3D or indoor maps.

No, it isn't. If it were a separate concern what would be the point of encoding the address in the first place?