These allrequire applicants to submit an acceptable Letter of Explanation addressing each specific issue and occurrence.Rental HistoryBecause a current landlord may say anything to get rid of a bad tenant out of desperation, we also requireinformation for the previous landlord of all applicants.

Do I tell them I’ve addressed their complaint and leave it at that?

Would tenants care that much about sharing a lease and technically an address if all of their living spaces were locked from eachother?

To me it seems like the county just needs a local residence address to send any documents to, whenever needed.

Is it possible to list my property and hide the exact address? 

As for the lease, you should have quiet hours in your lease and if you have a four plex you should have language that addresses care for common areas.

The ADU has separate meters and a separate address but is being listed as one property.

Probably, just don't give them your address until you are sure it is something you want to do.

What did you pay for it and what was the address?

Then you have a basis from which to address it with the tenants when you take over or you have their authorization to withhold it from the security deposit.