This example looks ok here https://www.openstreetmap.org/search?query=163-185%20jeavons%20lane#map=19/52.21058/-0.07114
but to find the houses with nominatim 165 jeavons lane doesn't work but 163-185 jeavons lane together does??
so we need more info on how to enter those numbers.
For semi- detached pairs ( two houses joined ) a search works. more dense numbers are messy with two or three story flats. nominatim finds this one (of a pair_ "20, Drivers Avenue, Huntingdon CP (Hunts), Huntingdon, Cambridgeshire, East of England, England, PE29 1UP, United Kingdom" here http://www.openstreetmap.org/#map=19/52.33466/-0.17465
The house numbering here works fine, try it. https://www.openstreetmap.org/way/159765075#map=18/44.74378/-63.46505https://www.openstreetmap.org/way/159765075#map=18/44.74378/-63.46505
There a bit here on flats http://wiki.openstreetmap.org/wiki/Key:addr:flats