In the US, we have a lot of address that have two house numbers associated with them: a house number and an apartment/unit/lot/suite number. The number on the front door is always the more specific apartment/unit/lot/suite number, though sometimes the more general street house number is included as well. For manufactured homes in a mobile home park, there is often one house number for the whole area and then each house gets a lot number. For example, the street address of a house might be: 25 Maple Street Lot 7 More likely than not, the number 25 will not be on the house at all, but only the number 7. So that would lead me to believe that we can use a way with building=yes, addr:housenumber=7 and addr:street=Maple Street, but the street address 7 Maple Street would be somewhere else entirely, so it seems like the 25 part of the address needs to be captured some way. Alternatively, you could tag every house in the subdivision with addr:housenumber=25, but then you could differentiate the houses from each other. Another example is townhouses where you have things like 25 Maple Street Unit 3 In this case, you probably don't have separate buildings, so you can put building=yes, addr:housenumber=25 and addr:street=Maple Street on the way for the building, and you can put addr:housenumber=3 on the node for the entrance to unit 3, but again how do you avoid confusion with the house at 3 Maple Street?

In the US, we have a lot of address that have two house numbers associated with them: a house number and an apartment/unit/lot/suite number. The number on the front door is always the more specific apartment/unit/lot/suite number, though sometimes the more general street house number is included as well. For manufactured homes in a mobile home park, there is often one house number for the whole area and then each house gets a lot number. For example, the street address of a house might be: 25 Maple Street Lot 7 More likely than not, the number 25 will not be on the house at all, but only the number 7. So that would lead me to believe that we can use a way with building=yes, addr:housenumber=7 and addr:street=Maple Street, but the street address 7 Maple Street would be somewhere else entirely, so it seems like the 25 part of the address needs to be captured some way. Alternatively, you could tag every house in the subdivision with addr:housenumber=25, but then you could differentiate the houses from each other. Another example is townhouses where you have things like 25 Maple Street Unit 3 In this case, you probably don't have separate buildings, so you can put building=yes, addr:housenumber=25 and addr:street=Maple Street on the way for the building, and you can put addr:housenumber=3 on the node for the entrance to unit 3, but again how do you avoid confusion with the house at 3 Maple Street?