Does Wikidata really not let us say what suburb a thing is in?! (I guess I knew that already, but still… hurrumph or what?)
@abbe98 Yes, location (P276) is the most promising, but it needs a qualifier to make it work properly and I'm not sure which one it should be for suburb: https://www.wikidata.org/wiki/Property:P276#P276$C4DD2803-6801-451D-AF05-9B68B785BBEB
The trouble is that a suburb isn't an administrative territorial entity.
@samwilson I guess suburb would likely be the most specific location value possible in most cases. So you wouldn't need a qualifier.
@samwilson dosn't any of P276, P131, or P8138 work?