Addresses with two house numbers?

Question

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?

Answer 1

The general consensus on addr:* tags now seems to be to put the main number in addr:housenumber and the minor number in addr:unit. In the example above for 25 Maple St Unit 3, we would have the following:

addr:housenumber=25
addr:street=Maple Street
addr:unit=3

Answer 2

What I do where a building contains multiple apartments is to tag it with addr:housenumber or addr:housename to indicate the address of the block, and then add addr:flatnumber to indicate which apartment numbers exist in the building. So you would have something like:

addr:street=Foo Street
addr:housenumber=25
addr:flatnumber=1-6

or, if the block is named:

addr:street=Bar Street
addr:housename=Baz House
addr:flatnumber=1-25

I think the wiki also has a tag for specifying how to interpolate the flat numbers if the block only contains odd or even numbers.

Answer 3

There seems to be many ways to do this in the wild, while searching I've seen:

building=entrance + ref=* more than 20 usages around the world, means flat "D" (can't do a search for that
addr:flatnumber 50 usages in world, + addr:flatnumber:interpolation=all/even/odd (just used once)

But I still think this is a general problem, there exist many places that have only one housenumber or address but include many sub addresses.

Unit numbers
Entrance numbers
Building numbers
Tent location
Parking numbers
Cabin numbers (in hotels)

Perhaps something like:

addr:subnumber=* 
title:addr:subnumber=Lot

or

ref=b-k
ref:title=flat/lot/entrance/blabla?

Answer 4

Can't you use something like addr:housenumber=25/7 for 25 Maple Street Lot 7? The housenumber tag allows alphanumeric characters not just numbers. So you could even write something like addr:housenumber=25 Lot 7. I think this solves your problem.

Addresses with two house numbers?

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