building interior plan

I think the privacy issues are likely to be not the same around the map. But as a guide you could think of the general accessibility of that type of information to the general public in the area. Some places will be very public and others not so, but it is also worth remembering publicly obtainable data about buildings from authorities and the like, i.e. in parts of Britain and North America Building plans made for planning control purposes are available for public scrutiny and then held on file. Accuracy to changes over the building life-cycle might not be reflected. I Guess it all comes down to a cultural judgement if in doubt you could just visit the place and discuss it with someone there. If you actually are connected to the specific building you have in mind then its probably a question you can answer internally to your organisation. Note the widespread disemination of the main OSM though. private offline sub-set additions could augment it more privately if needed.