[betamaxthetape]

The easiest thing to do for such cases is to add a note, perhaps with a picture of the building if you're comfortable.

There must be folk who dedicate their time to searching the OSM database for unresolved notes, because whenever I leave a note on StreetComplete mentioning an inaccuracy (e.g: a path where there isn't actually one, a driveway marked incorrectly as a road, etc.) I get an email alert a few days later notifying me that the note has been resolved - often by someone who lives in an entirely different country (and who can use the information I provide in the note plus the satellite imagery to resolve the note).

[matkoniecz]

I am one of such people (I do this partially to catch problems in StreetComplete design).

So thanks for leaving notes allowing remote fixing!

[JeremyNT]

Amazing, thanks for your efforts! I've just now sent a couple such notes up into the ether :)