This can also be done on a regular single family home where you rent out the rooms, but most people want more privacy than that. 

Yes, my wife and I house hack now, but our next one will be a du-triplex so we can have some privacy.

Do we build a privacy fence around the backyard? 

One caveat is that I was still hoping to keep it free for 50-75% of the time, in order not to limit my family's privacy too much, and still be able to host relatives and friends that happen to be around.

Also, in the city I reside in, 2nd story ADUs are very controversial due to privacy concerns and so the city has imposed height & size restrictions, prohibited balconies & decks, restricted location of exterior stairs, requiring opaque windows and the like.To start, I would suggest an architect who has experience with ADUs who is familiar with the variances of your jurisdiction.Good luck!

Oregon law protects tenants' privacy: Oregon law also protects tenants' privacy, including their income sources.

They might have added an interior wall to that closet for more privacy.

Sellers often prefer off-market transactions to maintain privacy, so assure the agent that you'll handle the information confidentially.4.

In the 7 years I’ve owned a lake front property in MN we’ve had a $6,000 per person private road repair, a $7,500 per property roof replacement, and last year a $19,000 deck/privacy wall replacement.

Renting rooms in a SFH is an option but I'd ideally want a set up where I can preserve my privacy!