[OSM-newbies] How to tag one of a named group of houses

[m902]

Where possible, I'm trying to use Karlsruhe Schema to tag houses and 
other buildings.
But I'm finding numerous examples where it is too limited.
This way <http://www.openstreetmap.org/browse/way/132578897> is an 
example. It is a terrace of houses called Addison Terrace (and the two 
blocks to the north are also part of the terrace).
So the actual address of one of the houses in the terrace is "26 Addison 
Terrace, New Road, Gillingham....".
Now I could probably drop 'New Road', but the problem is that Addison 
Terrace isn't a highway.
So "addr:street=Addison Terrace" doesn't work (Nominatim appears to 
ignore it).
So I could:
1. Select a section of New Road in front of Addison Terrace and give it 
alt_name=Addison Terrace and use that in addr:street (but so far as I 
can see Nominatim ignores that also).
2. Overlay a second highway called Addison Terrace over a section of New 
Road. Will work with Nominatim I guess but it hardly seems good practice.
3. Create a footway called Addison Terrace in front of the houses and 
use that (except there isn't one)
4. Draw the footway from New Road to each house and call each one 
Addison Terrace & use that (!!)
5. There is a service road behind the houses so I could call that 
Addison Terrace (except it isn't)
5. Some sort of relation rather like AssociatedStreet (is there one?)

I'm stuck...help please.
Thanks in advance...Martin

PS There's another example just to the south, with 3 apartment blocks 
together forming a complex called Nexus. I've fixed that temporarily by 
giving the service road the name Nexus and using that.
PPS I'll be using the JOSM Terracer plugin to create the terraces
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