The virtual address of any property refers to its location on the road network, as indicated by the local numbering/lettering system, where no official house numbers are assigned to it. It generally covers sides of the property where no entrance or mail delivery point is located.

These are assigned the house numbers which would be given to that side of the property following its context within the city's postal numbering grid. The virtual address cannot overlap existing addresses belonging to neighboring properties; rather it may take its cues from the address range endings on bordering properties.

An address is a locator and not a property of the building. Streets are renamed and renumbered while the building stands, so an address is current rather than permanent and an old one stays valid for the period it applied.

A building with several entrances usually has several addresses. One of them is the main address and the others are recorded beside it rather than replacing it.

An address is not a position. Two buildings can share one address, and a large site can have an address on a street it does not touch, so the address does not locate the building on the map.